Document and Entity Information	3 Months Ended
Document and Entity Information	Mar. 31, 2018 shares
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Entity Registrant Name	MEDIACOM BROADBAND CORP
Entity Central Index Key	0001161366
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding	0

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
CURRENT ASSETS
Cash	$ 170,970	$ 12,606
Accounts receivable, net of allowance for doubtful accounts of $3,090 and $3,364	32,259	71,994
Prepaid expenses and other current assets	32,790	22,881
Total current assets	236,019	107,481
Property, plant and equipment, net of accumulated depreciation of $1,688,250 and $1,663,609	832,131	825,348
Franchise rights	1,176,908	1,176,908
Goodwill	195,945	195,945
Other assets, net of accumulated amortization of $5,030 and $4,788	18,056	11,001
Total assets	2,459,059	2,316,683
CURRENT LIABILITIES
Accounts payable, accrued expenses and other current liabilities	155,147	147,739
Accounts payable - affiliates	3,384	22,154
Deferred revenue - current	22,181	41,382
Current portion of long-term debt	320,500	20,500
Total current liabilities	501,212	231,775
Long-term debt, net (less current portion)	1,200,795	1,537,080
Deferred revenue - non-current	7,913
Total liabilities	1,709,920	1,768,855
Commitments and contingencies (Note 10)
PREFERRED MEMBERS' INTEREST (Note 7)	150,000	150,000
MEMBER'S EQUITY
Capital contributions (distributions)	59,266	(98,268)
Retained earnings	539,873	496,096
Total member's equity	599,139	397,828
Total liabilities, preferred members' interest and member's equity	$ 2,459,059	$ 2,316,683

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 3,090	$ 3,364
Accumulated depreciation on property, plant and equipment	1,688,250	1,663,609
Accumulated amortization on other assets	$ 5,030	$ 4,788

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Revenues	$ 269,681	$ 261,508
Costs and expenses:
Service costs (exclusive of depreciation and amortization)	113,042	109,062
Selling, general and administrative expenses	47,708	47,517
Management fee expense	6,000	5,650
Depreciation and amortization	37,436	36,579
Operating income	65,495	62,700
Interest expense, net	(17,133)	(17,793)
Gain on derivatives, net	1,467	1,265
Other expense, net	(321)	(318)
Net income	49,508	45,854
Dividend to preferred members (Note 7)	(4,500)	(4,500)
Net income applicable to member	$ 45,008	$ 41,354

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 49,508	$ 45,854
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation and amortization	37,436	36,579
Gain on derivatives, net	(1,467)	(1,265)
Amortization of deferred financing costs	1,167	1,056
Changes in assets and liabilities:
Accounts receivable, net	6,887	3,608
Prepaid expenses and other assets	223	(5,390)
Accounts payable, accrued expenses and other current liabilities	7,903	(2,521)
Accounts payable - affiliates	(18,770)	2,229
Deferred revenue - current	(654)	964
Deferred revenue - non-current	(49)
Other non-current liabilities		(43)
Net cash flows provided by operating activities	82,184	81,071
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(44,889)	(46,037)
Change in accrued property, plant and equipment	1,018	3,358
Proceeds from sale of assets	743	52
Net cash flows used in investing activities	(43,128)	(42,627)
CASH FLOWS FROM FINANCING ACTIVITIES:
New borrowings of bank debt	31,000	78,000
Repayment of bank debt	(68,250)	(115,000)
Dividend payments on preferred members' interest (Note 7)	(4,500)	(4,500)
Capital contributions from parent (Note 8)	158,000	0
Capital distributions to parent (Note 8)	(500)	(800)
Other financing activities	3,558	(850)
Net cash flows provided by (used in) financing activities	119,308	(43,150)
Net change in cash	158,364	(4,706)
CASH, beginning of period	12,606	14,208
CASH, end of period	170,970	9,502
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest, net of amounts capitalized	8,726	$ 12,067
Non-cash items:
Accounts receivable/deferred revenue current - reclassification	32,848
Prepaid expenses and other current assets - reclassification	7,371
Deferred revenue - current/non-current - reclassification	7,962
Accounts payable/deferred revenue current - reclassification	$ 6,507

Organization	3 Months Ended
Organization	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	1. ORGANIZATION *Basis of Preparation of Unaudited Consolidated Financial Statements* Mediacom Broadband LLC (“Mediacom Broadband,” and collectively with its subsidiaries, “we,” “our” or “us”) is a Delaware limited liability company wholly-owned by Mediacom Communications Corporation (“MCC”). MCC is involved in the acquisition and operation of cable systems serving smaller cities and towns in the United States, and its cable systems are owned and operated through our operating subsidiaries and those of Mediacom LLC, a New York limited liability company wholly-owned by MCC. As limited liability companies, we and Mediacom LLC are not subject to income taxes and, as such, are included in the consolidated federal and state income tax returns of MCC, a C corporation. Our principal operating subsidiaries conduct all of our consolidated operations and own substantially all of our consolidated assets. Our operating subsidiaries are separate and distinct legal entities and have no obligation, contingent or otherwise, to make funds available to us. We rely on our parent, MCC, for various services such as corporate and administrative support. Our financial position, results of operations and cash flows could differ from those that would have resulted had we operated autonomously or as an entity independent of MCC. See Notes 8 and 9. We have prepared these unaudited consolidated financial statements in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”). In the opinion of management, such statements include all adjustments, consisting of normal recurring accruals and adjustments, necessary for a fair statement of our consolidated results of operations, financial position, and cash flows for the interim periods presented. The accounting policies followed during such interim periods reported are in conformity with generally accepted accounting principles in the United States of America and are consistent with those applied during annual periods. For a summary of our accounting policies and other information, refer to our Annual Report on Form 10-K for the year ended December 31, 2017. The results of operations for the interim periods are not necessarily indicative of the results that might be expected for future interim periods or for the full year ending December 31, 2018. Mediacom Broadband Corporation (“Broadband Corporation”), a Delaware corporation wholly-owned by us, co-issued, jointly and severally with us, public debt securities. Broadband Corporation has no operations, revenues or cash flows and has no assets, liabilities or stockholders’ equity on its balance sheet, other than a one-hundred dollar receivable from an affiliate and the same dollar amount of common stock. Therefore, separate financial statements have not been presented for this entity.

Recent Accounting Pronouncements	3 Months Ended
Recent Accounting Pronouncements	Mar. 31, 2018
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	2. RECENT ACCOUNTING PRONOUNCEMENTS *Accounting Pronouncements Adopted January 1, 2018* In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09 (“ASU 2014-09”) – Revenue from Contracts with Customers. The new guidance has impacted the timing of the recognition of installation revenue as well as installation costs and commission expenses. Under the new guidance, these amounts have been recognized as revenue and expenses over a period of time instead of immediately, as is being done under current practice. We adopted ASU 2014-09 as of January 1, 2018, using the modified retrospective method of adoption, with cumulative-effect adjustments consisting of: a decrease of $32.8 million to accounts receivable, an increase to prepaid expenses and other current assets of $7.2 million, an increase in other assets of $7.3 million, a decrease of accounts payable of $6.5 million, a decrease to deferred revenue - current of $18.5 million, an increase to deferred revenue – non-current of $8.0 million and a decrease to total shareholders’ equity of $1.3 million. Previously reported amounts were not restated as a result of this adoption method. Operating results for the three months ended March 31, 2018 are not materially different than results that would have been reported under guidance in effect before application of ASU 2014-09. See Note 12. In August 2016, the FASB issued ASU 2016-15 – Statement of Cash Flows – Clarification of Certain Cash Receipts and Cash Payments. (“ASU 2016-15”). Stakeholders indicated that there is diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows under Topic 230, Statement of Cash Flows, and other topics. ASU 2016-15 addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The amendments in ASU 2016-15 are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years using a retrospective transition method. We adopted ASU 2016-15 as of January 1, 2018. ASU 2016-15 did not have a material impact on our financial position, operations or cash flows upon adoption. *Accounting Pronouncements with Future Adoption Dates* In February 2016, the FASB issued ASU 2016-02 – Leases (Topic 842) (“ASU 2016-02”). The objective of ASU 2016-02 is to address the concerns to increase the transparency around lease obligations. To address these concerns, previously unrecorded off-balance sheet obligations will now be brought more prominently to light by presenting lease liabilities on the face of the balance sheet. Accompanied by enhanced qualitative and quantitative disclosures in the notes to the financial statements, financial statement users will be able to more accurately compare information from one company to another. This guidance is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2018. We continue to assess all of the potential impacts that the adoption of ASU 2016-02 will have on our consolidated financial statements, including the determination of the assets within the scope of the guidance, the development of new accounting policies, procedures and internal controls associated with the adoption of the standard and the need for new accounting systems. In January 2017, the FASB issued ASU 2017-04 – Intangibles – Goodwill and Other – (“ASU 2017-04”). ASU 2017-04 simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. A public business entity that is a U.S. Securities and Exchange Commission (SEC) filer should adopt the amendments in this Update for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. We do not expect ASU 2017-04 will have a material impact on our financial position, operations or cash flows upon adoption.

Fair Value

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value

3. FAIR VALUE

The tables below set forth our financial assets and liabilities measured at fair value on a recurring basis using a market-based approach. Our financial assets and liabilities, all of which represent interest rate exchange agreements (which we refer to as “interest rate swaps”) have been categorized according to the three-level fair value hierarchy established by Accounting Standards Codification (“ASC”) No. 820 — Fair Value Measurement, which prioritizes the inputs used in measuring fair value, as follows (dollars in thousands):

•

Level 1 — Quoted market prices in active markets for identical assets or liabilities.

•

Level 2 — Observable market based inputs or unobservable inputs that are corroborated by market data.

•

Level 3 — Unobservable inputs that are not corroborated by market data.


	Fair Value as of March 31, 2018
	Level 1		Level 2		Level 3		Total
Assets
Interest rate exchange agreements	$	—	$	3,621	$	—	$	3,621
Liabilities
Interest rate exchange agreements	$	—	$	—	$	—	$	—

	Fair Value as of December 31, 2017
	Level 1		Level 2		Level 3		Total
Assets
Interest rate exchange agreements	$	—	$	2,154	$	—	$	2,154
Liabilities
Interest rate exchange agreements	$	—	$	—	$	—	$	—

The fair value of our interest rate swaps represents the estimated amount that we would receive or pay to terminate such agreements, taking into account projected interest rates, based on quoted London Interbank Offered Rate (“LIBOR”) futures and the remaining time to maturity. While our interest rate swaps are subject to contractual terms that provide for the net settlement of transactions with counterparties, we do not offset assets and liabilities under these agreements for financial statement presentation purposes, and assets and liabilities are reported on a gross basis.

As of March 31, 2018, we recorded a current asset of $3.6 million and no current liability, long-term asset or long-term liability. As of December 31, 2017, we recorded a current asset of $2.2 million and no current liability, long-term asset or long-term liability.

As a result of the changes in the mark-to-market valuations on our interest rate swaps, we recorded net gains on derivatives of $1.5 million and $1.3 million for the three months ended March 31, 2018 and 2017, respectively.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Property, Plant and Equipment

3 Months Ended

Mar. 31, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

4. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consisted of the following (dollars in thousands):


	March 31,			December 31,
	2018			2017
Cable systems, equipment and customer devices	$	2,394,291		$	2,362,459
Vehicles		46,221			46,696
Buildings and leasehold improvements		37,875			37,810
Furniture, fixtures and office equipment		34,209			34,207
Land and land improvements		7,785			7,785

Property, plant and equipment, gross	$	2,520,381		$	2,488,957
Accumulated depreciation		(1,688,250	)		(1,663,609	)

Property, plant and equipment, net	$	832,131		$	825,348

Accounts Payable, Accrued Expenses and Other Current Liabilities

3 Months Ended

Mar. 31, 2018

Payables and Accruals [Abstract]

Accounts Payable, Accrued Expenses and Other Current Liabilities

5. ACCOUNTS PAYABLE, ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

Accounts payable, accrued expenses and other current liabilities consisted of the following (dollars in thousands):


	March 31,		December 31,
	2018		2017
Accounts payable—trade	$	36,783	$	39,415
Accrued programming costs		31,053		28,840
Accrued taxes and fees		17,645		16,221
Accrued interest		14,771		7,422
Accrued payroll and benefits		14,210		13,102
Advance customer payments		7,640		13,817
Accrued property, plant and equipment		7,793		6,775
Bank overdrafts ⁽¹⁾		6,577		3,020
Accrued service costs		6,556		6,171
Accrued administrative costs		5,136		4,355
Accrued marketing costs		3,690		3,528
Accrued telecommunications costs		1,157		816
Other accrued expenses		2,136		4,257

Accounts payable, accrued expenses and other current liabilities	$	155,147	$	147,739

(1)

Bank overdrafts represent outstanding checks in excess of funds on deposit at our disbursement accounts. We transfer funds from our depository accounts to our disbursement accounts upon daily notification of checks presented for payment. Changes in bank overdrafts are reported in “other financing activities” in our Consolidated Statements of Cash Flows.

Debt

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Debt

6. DEBT

Outstanding debt consisted of the following (dollars in thousands):


	March 31,		December 31,
	2018		2017
Bank credit facility	$	1,039,750	$	1,077,000
5¹⁄₂% senior notes due 2021		200,000		200,000
6³⁄₈% senior notes due 2023		300,000		300,000

Total debt	$	1,539,750	$	1,577,000
Less: current portion		320,500		20,500

Total long-term debt, gross (less current portion)	$	1,219,250	$	1,556,500
Less: deferred financing costs, net		18,455		19,420

Total long-term debt, net (less current portion)	$	1,200,795	$	1,537,080

2018 Financing Activity

On March 2, 2018, we called for the irrevocable redemption of the entire $300.0 million principal amount outstanding of our 6³⁄₈% senior notes due April 2023 (the “6³⁄₈% Notes”). As such, we have reclassified the entire balance of the 6³⁄₈% Notes to current portion of long-term debt as of March 31, 2018.

On March 30, 2018, we received $158.0 million of cash contributions from our parent, MCC, which, in turn, received such contributions from Mediacom LLC on the same date.

On April 2, 2018, we redeemed the 6³⁄₈% Notes. See Note 14.

Bank Credit Facility

As of March 31, 2018, we maintained a $1.415 billion credit facility, comprising:

•

$375.0 million of revolving credit commitments, which expire on November 2, 2022;

•

$243.8 million of outstanding borrowings under Term Loan A-1, which mature on November 2, 2022;

•

$796.0 million of outstanding borrowings under Term Loan M, which mature on January 15, 2025;

As of March 31, 2018, we had $365.3 million of unused revolving credit commitments, all of which were available to be borrowed and used for general corporate purposes, after giving effect to $9.7 million of letters of credit issued thereunder to various parties as collateral.

The credit facility is collateralized by our ownership interests in our operating subsidiaries and is guaranteed by us on a limited recourse basis to the extent of such ownership interests. As of March 31, 2018, the credit agreement governing the credit facility (the “credit agreement”) required our operating subsidiaries to maintain a total leverage ratio (as defined in the credit agreement) of no more than 5.0 to 1.0 and an interest coverage ratio (as defined in the credit agreement) of no less than 2.0 to 1.0. For all periods through March 31, 2018, our operating subsidiaries were in compliance with all covenants under the credit agreement. As of the same date, the credit agreement allowed for the full or partial repayment of any outstanding debt under the credit facility at any time prior to maturity, subject to certain prices and conditions specified in the credit agreement.

Interest Rate Swaps

We have entered into several interest rate exchange agreements (which we refer to as “interest rate swaps”) with various banks to fix the variable rate on a portion of our borrowings under the credit facility to reduce the potential volatility in our interest expense that may result from changes in market interest rates. Our interest rate swaps have not been designated as hedges for accounting purposes, and have been accounted for on a mark-to-market basis as of, and for each of the three months ended March 31, 2018 and 2017. As of March 31, 2018, we had interest rate swaps that fixed the variable portion of $600 million of borrowings at a rate of 1.5%, all of which are scheduled to expire during December 2018.

As of March 31, 2018, the weighted average interest rate on outstanding borrowings under the credit facility, including the effect of our interest rate swaps, was 3.4%.

Senior Notes

As of March 31, 2018, we had $500 million of outstanding senior notes, comprising $200 million of 5¹⁄₂% senior notes due April 2021 and $300 million of the 6³⁄₈% Notes. On April 2, 2018, we redeemed the 6³⁄₈% Notes. See Note 14.

Our senior notes are unsecured obligations, and the indentures governing our senior notes (the “indentures”) limit the incurrence of additional indebtedness based upon a maximum debt to operating cash flow ratio (as defined in the indentures) of 8.5 to 1.0. For all periods through March 31, 2018, we were in compliance with all covenants under the indentures. As of the same date, the indentures allowed for the full or partial repayment of any of our senior notes at any time prior to maturity, subject to certain prices and conditions specified in the indentures.

Debt Ratings

MCC’s corporate credit ratings are currently Ba2 by Moody’s, with a positive outlook and BB by Standard and Poor’s (“S&P”), with a positive outlook, and our senior unsecured ratings are currently B1 by Moody’s, with a positive outlook and B+ by S&P, with a positive outlook. There are no covenants, events of default, borrowing conditions or other terms in the credit agreement or indentures that are based on changes in our credit rating assigned by any rating agency.

Fair Value

The fair values of our senior notes and outstanding debt under the credit facility (which were calculated based upon unobservable inputs that are corroborated by market data that we determine to be Level 2), were as follows (dollars in thousands):


	March 31,		December 31,
	2018		2017
5¹⁄₂% senior notes due 2021	$	202,500	$	203,750
6³⁄₈% senior notes due 2023		311,064		312,000

Total senior notes	$	513,564	$	515,750

Bank credit facility	$	1,042,735	$	1,078,995

Preferred Members' Interest	3 Months Ended
Preferred Members' Interest	Mar. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]
Preferred Members' Interest	7. PREFERRED MEMBERS’ INTEREST In July 2001, we received a $150.0 million preferred membership investment (“PMI”) from the operating subsidiaries of Mediacom LLC, which has a 12% annual dividend, payable quarterly in cash. We may voluntarily repay the PMI any time at par, and the operating subsidiaries of Mediacom LLC have the option to call for the redemption of the PMI upon the repayment of all of our outstanding senior notes. We paid $4.5 million in cash dividends on the PMI during each of the three months ended March 31, 2018 and 2017.

Member's Equity	3 Months Ended
Member's Equity	Mar. 31, 2018
Equity [Abstract]
Member's Equity	8. MEMBER’S EQUITY As a wholly-owned subsidiary of MCC, our business affairs, including our financing decisions, are directed by MCC. See Note 9. Capital distributions to parent and capital contributions from parent are reported on a gross basis in the Consolidated Statements of Cash Flows. We received $158.0 million and $0 million in capital contributions from parent during the three months ended March 31, 2018 and 2017, respectively. We made capital distributions to parent in cash of $0.5 million and $0.8 million during the three months ended March 31, 2018 and 2017, respectively. See Note 14.

Related Party Transactions	3 Months Ended
Related Party Transactions	Mar. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	9. RELATED PARTY TRANSACTIONS MCC manages us pursuant to management agreements with our operating subsidiaries. Under such agreements, MCC has full and exclusive authority to manage our day-to-day operations and conduct our business. We remain responsible for all expenses and liabilities relating to the construction, development, operation, maintenance, repair and ownership of our systems. As compensation for the performance of its services, subject to certain restrictions, MCC is entitled under each management agreement to receive management fees in an amount not to exceed 4.0% of the annual gross operating revenues of our operating subsidiaries. MCC is also entitled to the reimbursement of all expenses necessarily incurred in its capacity as manager. MCC charged us management fees of $6.0 million and $5.7 million for the three months ended March 31, 2018 and 2017, respectively. Mediacom LLC is a preferred equity investor in us. See Note 7.

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	10. COMMITMENTS AND CONTINGENCIES *Legal Proceedings* We are involved in various legal actions arising in the ordinary course of business. In the opinion of management, the ultimate disposition of these matters is not expected to have a material adverse effect on our consolidated financial position, results of operations, cash flows or business.

Goodwill and Other Intangible Assets	3 Months Ended
Goodwill and Other Intangible Assets	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	11. GOODWILL AND OTHER INTANGIBLE ASSETS In accordance with the FASB’s ASC No. 350 — Intangibles — Goodwill and Other (“ASC 350”), the amortization of goodwill and indefinite-lived intangible assets is prohibited and requires such assets to be tested annually for impairment, or more frequently if impairment indicators arise. We have determined that our goodwill and franchise rights are indefinite-lived assets and therefore not amortizable. We last evaluated the factors surrounding our Mediacom Broadband reporting unit as of October 1, 2017 and did not believe that it was “more likely than not” that a goodwill impairment existed at that time. As such, we did not perform Step 2 of the goodwill impairment test. We last evaluated our other intangible assets as of October 1, 2017 and did not believe that it was “more likely than not” that an impairment existed at that time. Because we believe there has not been a meaningful change in the long-term fundamentals of our business during the first three months of 2018, we determined that there has been no triggering event under ASC 350 and, as such, no interim impairment test was required for our goodwill and other intangible assets as of March 31, 2018.

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Revenue Recognition

3 Months Ended

Mar. 31, 2018

Text Block [Abstract]

Revenue Recognition

12. REVENUE RECOGNITION

We adopted the new accounting guidance for revenue recognition (i.e. ASU 2014-09) as of January 1, 2018. See Note 2.

We disaggregate revenue from contracts with customers by type of services. We have determined that disaggregating revenue into these categories depicts how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors in our one reporting segment.

Nature of Services

Our primary revenue stream is subscription-based and consists of: video service, high-speed data service and phone service. These services have base-level offerings and can be upgraded to premium level services. Residential customers can cancel their services at any time with no penalty. Small-to-medium business customers and large enterprise-class customers (collectively, “business customers”) are generally subject to fixed-term contracts with penalties imposed for early cancellation. We recognized revenue as services are provided on a monthly basis in an amount that reflects the consideration to which we expect to be entitled in exchange for those services. Billing for all services (regardless of customer type) typically occurs in advance of services being delivered and paid by customers on a monthly basis.

We also generate revenue from installation services and customer premise equipment rental associated with its subscription-based services. After installation occurs, equipment is rented to the customer over the service period to allow the customer to use the various subscription services noted above. Installation services are not separate performance obligations, rather the fees for installation services are viewed as advance payments for future services and are recognized over the period of benefit which is estimated to be the life of the customer relationship (approximately three years for residential customers and 1-10 years for all other customers). Customer premise equipment rentals are not separate performance obligations and they are considered to be highly interdependent on the underlying video, high-speed data and/or telephone service. Revenue for equipment rental is recognized when control of the underlying services is transferred to our customers over time.

One of our other revenue streams is advertising sales. These revenues represent the insertion of commercials into various video and/or internet platforms for an advertising customer. Revenue for these services is billed in advance and the performance obligation for these contracts is satisfied as the commercials are displayed. There are no agent relationships included in our delivery of our advertising services. Our obligation for returns and/or refunds is deemed insignificant. Revenue is recognized at a point in time as commercials are displayed by us and viewed by the public.

A significant portion of our revenue streams are derived from customers who may cancel their subscriptions at any time without penalty. As such, the amount of revenue related to unsatisfied, remaining performance obligations is not necessarily indicative of the future revenue to be recognized from our existing customer base. Revenue from customers with a contract containing a specified contract term and non-cancelable service period will be recognized over the term of such contracts, which is generally 1-10 years.

Franchise fees imposed by local governmental authorities are collected on a monthly basis from our customers and are periodically remitted to the local governmental authorities. Because franchise fees are our obligation, we present them on a gross basis within revenues with a corresponding operating expense. Franchise fees reported on a gross basis amounted to $5.3 million and $5.5 million for the three months ended March 31, 2018 and 2017, respectively.

Significant Judgments

We often provide multiple services to a customer such as: subscription services, premium video and HSD upgrades, installation services and equipment rental. These services are highly integrated within our video, HSD and phone service offerings. Judgment is required to determine whether the delivery of customer premise equipment, installation services, and additional premium services are considered distinct and should be accounted for separately from subscription services. Alternatively, the determination that these offerings are not distinct would cause these offerings to be accounted for on a combined basis within our subscription services.

Allocation of the transaction price to the distinct performance obligations in bundled service subscriptions requires judgment. The transaction price for bundled residential services is often discounted. This results in a combined, bundled price that is less than the sum of each of the individual standalone selling prices for each service. We allocate discounts for bundled residential services among each of the services to which the discount relates based on the relative standalone selling prices of those services. Standalone selling prices for our residential services are directly observable.

We believe that non-refundable upfront installation fees charged to customers result in a material right to renew the contract. As such, these upfront fees are not required to be paid upon subsequent renewals. These fees are deferred and recognized over the estimated life of the contract (approximately three years for residential customers and 1-10 years for all other customers). Estimation of the deferral period requires consideration of both quantitative and qualitative factors.

Our revenues by type of service are as follows (dollars in thousands):


	Three Months Ended
Type of services	March 31, 2018
Video	$	107,672
Data		97,501
Phone		15,149
Business		40,153
Advertising		9,206

Total revenue	$	269,681

Virtually all our revenue streams, including subscription services, advertising and equipment rental, are recognized over time. The company recognizes revenue at a point in time for services such as pay-per-view, video on demand and miscellaneous fees.

Contract Balances

We perform our obligations under contracts with customers by transferring services in exchange for receiving consideration from our customers. The timing of our performance often differs from the timing of the customer’s payment, which results in the recognition of a contract asset or a contract liability. We recognize a contract asset when we have the right to consideration for services transferred to a customer. Contract assets are classified as accounts receivable in our Consolidated Balance Sheet, where our right to consideration is unconditional. We recognize a contract liability for amounts paid by the customer, where we have a right to receive consideration before the transfer of services to the customer. Customers are generally billed in advance for most services we provide, resulting in a contract liability until such services are transferred to the customer. Contract liabilities are recorded as deferred revenue (current and non-current) in our Consolidated Balance Sheet.

The amount of revenue recognized during the three months ending March 31, 2018 that was included in the opening contract liability balance is $16.7 million.

The difference in the opening and closing balances of our receivables and contract liability primarily result from the timing difference between our performance and the customer’s payment.

There was no impairment of receivables during the three months ended March 31, 2018.

Contract Costs

We capitalize amounts paid to obtain and fulfill a contract with a customer (e.g. sales commissions and installation activities on new contracts). We incur sales commissions in our effort to obtain customer contracts. These commissions are paid as an incentive to our employees, who are performing in a sales function, which is directly related to the contract obtained. Additionally, we incur costs to fulfill a contract through installation activities performed by its technicians. These costs include allocations of the amounts incurred for all activities associated with the installation services which are performed at a customer’s premises, such as technician’s wages and benefits, fuel costs, and vehicle maintenance.

As of March 31, 2018, the balance recognized from the costs incurred to obtain or fulfill a contract with a customer was $14.3 million of which approximately $7.0 million was short-term (recorded in prepaid and other current assets) and $7.3 million was long-term (other assets, net).

We amortize the contract assets recognized from the costs to obtain or fulfill a contract with a customer on a systematic basis, consistent with the pattern of transfer to which the services relate. For residential customers, there are no stated contract terms but operate on a day to day basis that renews over time, in practice. For these residential contracts, the contract period including renewals is estimated to be our average churn rate or turnover rate, which is approximately three years. For business customers, the amortization period is the initial contract term which ranges from 1 – 10 years. The amount of amortization that we recognized in service costs for installation activities for the three months ended March 31, 2018 was $0.5 million. The amount of amortization that we recognized in selling, general and administrative expenses for sales commissions for the three months ended March 31, 2018 was $1.7 million.

Supplemental Disclosures of Cash Flow Information

Our customers are typically billed in advance for the services we provide on a monthly basis. Historically, we have recorded such amounts in both accounts receivable and deferred revenue at the time of billing. With our adoption of the new revenue recognition guidance as of January 1, 2018, we record billed amounts when we have established an unconditional right to receive payment from our customers for services to be delivered or delivered to date under the customer’s contract. Since we adopted this new guidance using the modified retrospective method, and for more information about accounts receivable, deferred revenue and other affected accounts, please refer to the non-cash items noted in the Supplemental Disclosures of Cash Flow Information section in our Consolidated Statement of Cash Flows for the three months ended March 31, 2018. Previously reported amounts were not restated as a result of this adoption method.

Sale of Assets	3 Months Ended
Sale of Assets	Mar. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Sale of Assets	13. SALE OF ASSETS *Tower Asset Sale* On November 15, 2017, MCC entered into an asset purchase agreement (the “APA”) to sell substantially all of its operating subsidiaries’ tower assets (the “tower assets”) to CTI Towers (“CTI”), subject to closing conditions and requirements per the APA. Such tower assets were non-strategic to MCC’s cable operations. CTI leases space on towers to wireless carriers, and MCC will receive equity in CTI, representing a minority position, in exchange for MCC’s tower assets. On December 21, 2017, we contributed certain tower assets to MCC which, in turn, sold such tower assets to CTI. This transaction partially completed the tower asset sale, and we expect to contribute our remaining tower assets to MCC and, in turn, MCC will sell such assets to CTI during the year ending December 31, 2018, pursuant to the terms and conditions of the APA. The contributed tower assets had a net book value of approximately $0.1 million at the time of transfer. In conjunction, with the sale, we reduced our asset retirement obligation (liability) by approximately $0.1 million. On March 15, 2018, we contributed certain tower assets to MCC which, in turn, sold such tower assets to CTI. This transaction partially completed the tower asset sale, and we expect to contribute our remaining tower assets to MCC and, in turn, MCC will sell such assets to CTI during the year ending December 31, 2018, pursuant to the terms and conditions of the APA. The contributed tower assets had a net book value of approximately $0.1 million at the time of transfer. In conjunction, with the sale, we reduced our asset retirement obligation (liability) by approximately $0.1 million.

Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	14. SUBSEQUENT EVENTS On April 2, 2018, we redeemed the 6³⁄₈% Notes at a redemption price of 103.188% for each $1,000 principal amount outstanding or approximately $309.6 million. Such redemption was funded with cash contributions of $158.0 million from our parent, MCC, which were received on March 30, 2018, along with $151.6 million of borrowings under our revolving credit commitments. See Note 6.

Organization (Policies)	3 Months Ended
Organization (Policies)	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Preparation of Unaudited Consolidated Financial Statements	*Basis of Preparation of Unaudited Consolidated Financial Statements* Mediacom Broadband LLC (“Mediacom Broadband,” and collectively with its subsidiaries, “we,” “our” or “us”) is a Delaware limited liability company wholly-owned by Mediacom Communications Corporation (“MCC”). MCC is involved in the acquisition and operation of cable systems serving smaller cities and towns in the United States, and its cable systems are owned and operated through our operating subsidiaries and those of Mediacom LLC, a New York limited liability company wholly-owned by MCC. As limited liability companies, we and Mediacom LLC are not subject to income taxes and, as such, are included in the consolidated federal and state income tax returns of MCC, a C corporation. Our principal operating subsidiaries conduct all of our consolidated operations and own substantially all of our consolidated assets. Our operating subsidiaries are separate and distinct legal entities and have no obligation, contingent or otherwise, to make funds available to us. We rely on our parent, MCC, for various services such as corporate and administrative support. Our financial position, results of operations and cash flows could differ from those that would have resulted had we operated autonomously or as an entity independent of MCC. See Notes 8 and 9. We have prepared these unaudited consolidated financial statements in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”). In the opinion of management, such statements include all adjustments, consisting of normal recurring accruals and adjustments, necessary for a fair statement of our consolidated results of operations, financial position, and cash flows for the interim periods presented. The accounting policies followed during such interim periods reported are in conformity with generally accepted accounting principles in the United States of America and are consistent with those applied during annual periods. For a summary of our accounting policies and other information, refer to our Annual Report on Form 10-K for the year ended December 31, 2017. The results of operations for the interim periods are not necessarily indicative of the results that might be expected for future interim periods or for the full year ending December 31, 2018. Mediacom Broadband Corporation (“Broadband Corporation”), a Delaware corporation wholly-owned by us, co-issued, jointly and severally with us, public debt securities. Broadband Corporation has no operations, revenues or cash flows and has no assets, liabilities or stockholders’ equity on its balance sheet, other than a one-hundred dollar receivable from an affiliate and the same dollar amount of common stock. Therefore, separate financial statements have not been presented for this entity.

Fair Value (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value of Interest Rate Swap Assets and Liabilities


	Fair Value as of March 31, 2018
	Level 1		Level 2		Level 3		Total
Assets
Interest rate exchange agreements	$	—	$	3,621	$	—	$	3,621
Liabilities
Interest rate exchange agreements	$	—	$	—	$	—	$	—

	Fair Value as of December 31, 2017
	Level 1		Level 2		Level 3		Total
Assets
Interest rate exchange agreements	$	—	$	2,154	$	—	$	2,154
Liabilities
Interest rate exchange agreements	$	—	$	—	$	—	$	—

Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2018

Property, Plant and Equipment [Abstract]

Components of Property, Plant and Equipment

Property, plant and equipment consisted of the following (dollars in thousands):


	March 31,			December 31,
	2018			2017
Cable systems, equipment and customer devices	$	2,394,291		$	2,362,459
Vehicles		46,221			46,696
Buildings and leasehold improvements		37,875			37,810
Furniture, fixtures and office equipment		34,209			34,207
Land and land improvements		7,785			7,785

Property, plant and equipment, gross	$	2,520,381		$	2,488,957
Accumulated depreciation		(1,688,250	)		(1,663,609	)

Property, plant and equipment, net	$	832,131		$	825,348

Accounts Payable, Accrued Expenses and Other Current Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Payables and Accruals [Abstract]

Summary of Accounts Payable, Accrued Expenses and Other Current Liabilities

Accounts payable, accrued expenses and other current liabilities consisted of the following (dollars in thousands):


	March 31,		December 31,
	2018		2017
Accounts payable—trade	$	36,783	$	39,415
Accrued programming costs		31,053		28,840
Accrued taxes and fees		17,645		16,221
Accrued interest		14,771		7,422
Accrued payroll and benefits		14,210		13,102
Advance customer payments		7,640		13,817
Accrued property, plant and equipment		7,793		6,775
Bank overdrafts ⁽¹⁾		6,577		3,020
Accrued service costs		6,556		6,171
Accrued administrative costs		5,136		4,355
Accrued marketing costs		3,690		3,528
Accrued telecommunications costs		1,157		816
Other accrued expenses		2,136		4,257

Accounts payable, accrued expenses and other current liabilities	$	155,147	$	147,739

(1)

Debt (Tables)

3 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Summary of Outstanding Debt

Outstanding debt consisted of the following (dollars in thousands):


	March 31,		December 31,
	2018		2017
Bank credit facility	$	1,039,750	$	1,077,000
5¹⁄₂% senior notes due 2021		200,000		200,000
6³⁄₈% senior notes due 2023		300,000		300,000

Total debt	$	1,539,750	$	1,577,000
Less: current portion		320,500		20,500

Total long-term debt, gross (less current portion)	$	1,219,250	$	1,556,500
Less: deferred financing costs, net		18,455		19,420

Total long-term debt, net (less current portion)	$	1,200,795	$	1,537,080

Fair Values of Senior Notes and Outstanding Debt under Credit Facility


	March 31,		December 31,
	2018		2017
5¹⁄₂% senior notes due 2021	$	202,500	$	203,750
6³⁄₈% senior notes due 2023		311,064		312,000

Total senior notes	$	513,564	$	515,750

Bank credit facility	$	1,042,735	$	1,078,995

Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2018

Text Block [Abstract]

Summary of Disaggregation of Revenue Qualitative Reconciliation

Our revenues by type of service are as follows (dollars in thousands):


	Three Months Ended
Type of services	March 31, 2018
Video	$	107,672
Data		97,501
Phone		15,149
Business		40,153
Advertising		9,206

Total revenue	$	269,681

Organization - Additional Information (Detail)	Mar. 31, 2018 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Amount due from affiliate by subsidiary	$ 100

- Definition

Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due after 1 year (or 1 business cycle).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-06(3)(a)(3))
-URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e604059-122996

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(1))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(3))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(11))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(3))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Recent Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Decrease to accounts receivable	$ 32,259		$ 71,994
Increase to prepaid expenses and other current assets	32,790		22,881
Increase in other assets	18,056		11,001
Decrease of accounts payable	36,783		39,415
Decrease to deferred revenue - current	22,181		41,382
Increase to deferred revenue - non-current	7,913
Decrease to total shareholders' equity	$ 599,139		$ 397,828
Accounting Standards Update 2014-09 [Member] \| Difference between Revenue Guidance in Effect Before and After Topic 606 [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Decrease to accounts receivable		$ 32,800
Increase to prepaid expenses and other current assets		7,200
Increase in other assets		7,300
Decrease of accounts payable		6,500
Decrease to deferred revenue - current		18,500
Increase to deferred revenue - non-current		8,000
Decrease to total shareholders' equity		$ 1,300

Fair Value - Fair Value of Interest Rate Swap Assets and Liabilities (Detail) - Interest Rate Swap [Member] - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$ 3,621	$ 2,154
Liabilities	0	0
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	3,621	2,154
Liabilities	0	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	$ 0	$ 0

Fair Value - Additional Information (Detail) - USD ($)	3 Months Ended
Fair Value - Additional Information (Detail) - USD ($)	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Current liability	$ 0		$ 0
Long-term liability	0		0
Long term assets	0		0
Current assets	3,600,000		$ 2,200,000
Net gains on derivatives	$ 1,500,000	$ 1,300,000

Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,520,381	$ 2,488,957
Accumulated depreciation	(1,688,250)	(1,663,609)
Property, plant and equipment, net	832,131	825,348
Cable Systems, Equipment and Customer Devices [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,394,291	2,362,459
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	46,221	46,696
Buildings and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	37,875	37,810
Furniture, Fixtures and Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	34,209	34,207
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 7,785	$ 7,785

Accounts Payable, Accrued Expenses and Other Current Liabilities - Summary of Accounts Payable, Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Payables and Accruals [Abstract]
Accounts payable-trade	$ 36,783	$ 39,415
Accrued programming costs	31,053	28,840
Accrued taxes and fees	17,645	16,221
Accrued interest	14,771	7,422
Accrued payroll and benefits	14,210	13,102
Advance customer payments	7,640	13,817
Accrued property, plant and equipment	7,793	6,775
Bank overdrafts	6,577	3,020
Accrued service costs	6,556	6,171
Accrued administrative costs	5,136	4,355
Accrued marketing costs	3,690	3,528
Accrued telecommunications costs	1,157	816
Other accrued expenses	2,136	4,257
Accounts payable, accrued expenses and other current liabilities	$ 155,147	$ 147,739

Debt - Summary of Outstanding Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total debt	$ 1,539,750	$ 1,577,000
Less: current portion	320,500	20,500
Total long-term debt, gross (less current portion)	1,219,250	1,556,500
Total long-term debt, gross (less current portion)	1,219,250	1,556,500
Less: deferred financing costs, net	18,455	19,420
Total long-term debt, net (less current portion)	1,200,795	1,537,080
Bank Credit Facility [Member]
Debt Instrument [Line Items]
Total debt	1,039,750	1,077,000
5 1/2% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Total debt	200,000	200,000
6 3/8% Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Total debt	$ 300,000	$ 300,000

Debt - Summary of Outstanding Debt (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2018
5 1/2% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument, Interest rate	5.50%
Debt instrument, Maturity	2021
6 3/8% Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Debt instrument, Interest rate	6.375%
Debt instrument, Maturity	2023

Debt - Additional Information (Detail) - USD ($) $ in Thousands			3 Months Ended
	Apr. 02, 2018	Mar. 30, 2018	Mar. 31, 2018	Mar. 31, 2017	Mar. 02, 2018
Debt Instrument [Line Items]
Capital contributions from parent		$ 158,000	$ 158,000	$ 0
Outstanding senior notes			$ 500,000
Maximum [Member]
Debt Instrument [Line Items]
Required debt to operating cash flow			850.00%
Bank Credit Facility [Member]
Debt Instrument [Line Items]
Unused revolving credit commitments			$ 365,300
Letter of Credit [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding			$ 9,700
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Expiration date of revolving credit commitments			Dec. 31, 2018
Interest rate on borrowings			1.50%
Weighted average interest rate on outstanding borrowings			3.40%
Interest Rate Swap [Member] \| Not Designated as Hedging Instrument [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding			$ 600,000
Bank Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding			$ 1,415,000
Bank Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio			500.00%
Bank Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest coverage ratio			200.00%
Bank Credit Facility [Member] \| Revolving Credit Commitments at Present [Member]
Debt Instrument [Line Items]
Revolving credit commitments			$ 375,000
Expiration date of revolving credit commitments			Nov. 02, 2022
Bank Credit Facility [Member] \| Term Loan A-1 [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding			$ 243,800
Expiration date of revolving credit commitments			Nov. 02, 2022
Bank Credit Facility [Member] \| Term Loan M [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding			$ 796,000
Expiration date of revolving credit commitments			Jan. 15, 2025
6 3/8% Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Debt, called for redemption					$ 300,000
Capital contributions from parent		$ 158,000
Outstanding senior notes			$ 300,000
6 3/8% Senior Notes Due 2023 [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Notes redeemable date	Apr. 02, 2018
6 3/8% Senior Notes Due 2023 [Member] \| Subsequent Event [Member] \| Revolving Credit Commitments at Present [Member]
Debt Instrument [Line Items]
Revolving credit commitment outstanding	$ 151,600
5 1/2% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Outstanding senior notes			$ 200,000
Senior notes expiration date			2021-04

Debt - Fair Values of Senior Notes and Outstanding Debt under Credit Facility (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total senior notes	$ 513,564	$ 515,750
5 1/2% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Total senior notes	202,500	203,750
6 3/8% Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Total senior notes	311,064	312,000
Bank Credit Facility [Member]
Debt Instrument [Line Items]
Total senior notes	$ 1,042,735	$ 1,078,995

Debt - Fair Values of Senior Notes and Outstanding Debt under Credit Facility (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2018
5 1/2% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument, Interest rate	5.50%
Debt instrument, Maturity	2021
6 3/8% Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Debt instrument, Interest rate	6.375%
Debt instrument, Maturity	2023

Preferred Members' Interest - Additional Information (Detail) - Mediacom LLC [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jul. 31, 2001
Class Of Stock [Line Items]
Preferred equity investment			$ 150.0
Percentage of annual cash dividend on preferred equity investment	12.00%
Cash dividends on PMI	$ 4.5	$ 4.5

Member's Equity - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended
	Mar. 30, 2018	Mar. 31, 2018	Mar. 31, 2017
Equity [Abstract]
Capital contributions from parent	$ 158,000	$ 158,000	$ 0
Capital distributions to parent		$ 500	$ 800

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Related Party Transaction [Line Items]
Management fees charged by MCC	$ 6,000	$ 5,650
MCC [Member]
Related Party Transaction [Line Items]
Management fees charged by MCC	$ 6,000	$ 5,700
MCC [Member] \| Management Fees [Member] \| Operating Revenues [Member] \| Maximum [Member]
Related Party Transaction [Line Items]
Rate of annual gross operating revenues of our operating subsidiaries	4.00%

Revenue Recognition - Additional Information (Detail)	3 Months Ended
Revenue Recognition - Additional Information (Detail)	Mar. 31, 2018 USD ($) Segment	Mar. 31, 2017 USD ($)
Disaggregation of Revenue [Line Items]
Number of reporting segments affected \| Segment	1
Franchise fees imposed by local governmental authorities	$ 5,300,000	$ 5,500,000
Contract with Customer, Liability, Revenue Recognized	16,700,000
Costs incurred to obtain or fulfill a contract with a customer	14,300,000
Short-term [Member]
Disaggregation of Revenue [Line Items]
Costs incurred to obtain or fulfill a contract with a customer	7,000,000
Long-term [Member]
Disaggregation of Revenue [Line Items]
Costs incurred to obtain or fulfill a contract with a customer	7,300,000
Accounts Receivable [Member]
Disaggregation of Revenue [Line Items]
Impairment of receivables	$ 0
Residential Contracts [Member]
Disaggregation of Revenue [Line Items]
Estimated revenue, expected recognition period	3 years
Amortization period	Three years
Commercial and Enterprise Contracts [Member] \| Minimum [Member]
Disaggregation of Revenue [Line Items]
Amortization period	1 years
Commercial and Enterprise Contracts [Member] \| Maximum [Member]
Disaggregation of Revenue [Line Items]
Amortization period	10 years
Other Customers [Member] \| Minimum [Member]
Disaggregation of Revenue [Line Items]
Estimated revenue, expected recognition period	1 year
Other Customers [Member] \| Maximum [Member]
Disaggregation of Revenue [Line Items]
Estimated revenue, expected recognition period	10 years
Installation Activities [Member]
Disaggregation of Revenue [Line Items]
Amortization recognized	$ 500,000
Sales Commissions [Member]
Disaggregation of Revenue [Line Items]
Amortization recognized	$ 1,700,000
Specified Contract Term and Non-Cancelable Service Period [Member] \| Minimum [Member]
Disaggregation of Revenue [Line Items]
Estimated revenue, expected recognition period	1 year
Specified Contract Term and Non-Cancelable Service Period [Member] \| Maximum [Member]
Disaggregation of Revenue [Line Items]
Estimated revenue, expected recognition period	10 years

Revenue Recognition - Summary of Disaggregation of Revenue Qualitative Reconciliation (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Total revenue	$ 269,681	$ 261,508
Video [Member]
Disaggregation of Revenue [Line Items]
Type of services	107,672
Data [Member]
Disaggregation of Revenue [Line Items]
Type of services	97,501
Phone [Member]
Disaggregation of Revenue [Line Items]
Type of services	15,149
Business [Member]
Disaggregation of Revenue [Line Items]
Type of services	40,153
Advertising [Member]
Disaggregation of Revenue [Line Items]
Type of services	$ 9,206

Sale of Assets - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 15, 2018	Mar. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net book value		$ 832,131	$ 825,348
CTI Towers [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net book value	$ 100
Reduction of asset retirement obligation (liability) in conjunction of sale	$ 100

Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands			3 Months Ended
	Apr. 02, 2018	Mar. 30, 2018	Mar. 31, 2018	Mar. 31, 2017
Subsequent Event [Line Items]
Capital contributions from parent		$ 158,000	$ 158,000	$ 0
6 3/8% Senior Notes Due 2023 [Member]
Subsequent Event [Line Items]
Capital contributions from parent		$ 158,000
Subsequent Event [Member] \| 6 3/8% Senior Notes Due 2023 [Member]
Subsequent Event [Line Items]
Debt, redemption price percentage	103.188%
Debt, aggregate redemption price	$ 309,600
Subsequent Event [Member] \| 6 3/8% Senior Notes Due 2023 [Member] \| Revolving Credit Commitments at Present [Member]
Subsequent Event [Line Items]
Revolving credit commitment outstanding	$ 151,600

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details