Marina District Finance 10-K 19 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Jun. 30, 2014
Entity Information [Line Items]
Entity Registrant Name	Marina District Finance Company, Inc.
Entity Central Index Key	1517007
Current Fiscal Year End Date	-19
Entity Filer Category	Non-accelerated Filer
Document Type	10-K
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding	0
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float		$0

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets
Cash and cash equivalents	$36,054	$37,527
Restricted Cash and Cash Equivalents, Current	5,676	0
Accounts receivable, net	32,839	33,328
Inventories	4,455	4,184
Prepaid expenses and other current assets	17,895	7,613
Amounts payable to (receivable from) State	0	1,037
Deferred income taxes	3,378	2,488
Total current assets	100,297	86,177
Property and equipment, net	1,173,222	1,212,934
Debt financing costs, net	8,435	11,347
Other assets, net	14,682	10,361
Total assets	1,296,636	1,320,819
Current liabilities
Current maturities of long-term debt	3,800	3,800
Accounts payable	5,674	5,924
Other current tax liabilities	3,573	0
Income taxes payable, net	4,143	0
Accrued liabilities	104,960	98,095
Total current liabilities	122,150	107,819
Long-term debt, net of current maturities	741,519	797,460
Deferred income taxes	6,315	7,049
Other long-term tax liabilities	9,768	9,224
Other liabilities	5,007	11,099
Commitments and contingencies (Note 6)
Members' Equity	411,877	388,168
Total liabilities and member equity	$1,296,636	$1,320,819

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating revenues:
Gaming	$672,570	$615,734	$609,128
Food and beverage	138,396	140,292	140,391
Room	118,308	115,113	114,505
Other	41,174	42,377	39,515
Gross revenues	970,448	913,516	903,539
Less promotional allowances	232,237	217,816	217,317
Net revenues	738,211	695,700	686,222
Operating costs and expenses:
Gaming	268,187	249,357	254,935
Food and beverage	71,259	71,048	71,584
Room	14,076	12,934	13,492
Other	33,953	34,642	31,712
Selling, general and administrative	132,898	148,780	139,101
Maintenance and utilities	61,740	59,514	59,633
Depreciation and amortization	58,969	60,908	63,956
Impairments of assets	0	5,032	2,811
Other operating items, net	-1,746	3,318	-7,700
Preopening expenses	269	4,056	240
Total operating costs and expenses	639,605	649,589	629,764
Operating income	98,606	46,111	56,458
Other expense
Interest expense, net	70,758	81,335	82,902
Loss (gain) on early extinguishments of debt	740	25,856	0
Total other expense	71,498	107,191	82,902
Income (loss) before state income taxes	27,108	-61,080	-26,444
State income tax benefit (provision)	-3,399	4,503	1,253
Net income (loss)	$23,709	($56,577)	($25,191)

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Members Equity (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Members' Equity	$411,877	$388,168	$411,877	$388,168	$444,745	$469,936
Increase Decrease in Member Equity [Roll Forward]
Net income (loss)	2,634	-40,765	23,709	-56,577	-25,191
Capital Contributions
Members' Equity	446,700	446,700	446,700	446,700	446,700	446,700
Increase Decrease in Member Equity [Roll Forward]
Net income (loss)			0	0	0
Retained Earnings/ (Accumulated Deficit)
Members' Equity	-34,823	-58,532	-34,823	-58,532	-1,955	23,236
Increase Decrease in Member Equity [Roll Forward]
Net income (loss)				($56,577)	($25,191)

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Activities
Net income (loss)	$23,709	($56,577)	($25,191)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	58,969	60,908	63,956
Gain from insurance recoveries	-2,197	0	-7,694
Amortization of debt financing costs	2,614	1,472	1,349
Amortization of discounts on long-term debt	2,308	3,782	3,716
Deferred income taxes	-1,624	-5,523	-1,636
Provision for doubtful accounts	4,028	2,824	1,954
Noncash asset write-downs	0	5,212	2,805
Gains (Losses) on Extinguishment of Debt	-740	-25,856	0
Gain Loss on Early Retirements of Debt		-25,857
Write-down of debt financing costs	0	0	146
Other operating activities	366	4	30
Changes in operating assets and liabilities:
Restricted Cash	-5,676	0	0
Accounts receivable, net	-3,539	749	-1,391
Inventories	-271	-320	439
Prepaid expenses and other current assets	-10,652	-871	-57
Other current tax liabilities	-3,573	0	0
Income taxes receivable/payable	5,180	-1,693	57
Other long-term tax assets	0	0	521
Other assets, net	-4,740	16,560	-1,437
Accounts payable and accrued liabilities	6,561	3,694	-390
Other long-term tax liabilities	544	-2,228	-195
Other liabilities	-6,092	2,133	-440
Net cash provided by operating activities	73,801	55,983	36,542
Cash Flows from Investing Activities
Capital expenditures	-18,716	-22,357	-34,742
Insurance proceeds for replacement assets	2,197	0	3,944
Other investing activities, net	0	0	2,800
Net cash used in investing activities	-16,519	-22,357	-27,998
Cash Flows from Financing Activities
Borrowings under bank credit facility	526,100	444,500	632,700
Payments under bank credit facility	-552,300	-424,600	-652,900
Proceeds from Issuance of Long-term Debt	0	376,200	0
Repayments of Senior Debt	0	416,209	0
Payments on term loan	-32,300	0	0
Debt financing costs	-255	-10,115	-443
Net cash used in financing activities	-58,755	-30,224	-20,643
Increase (decrease) in cash and cash equivalents	-1,473	3,402	-12,099
Cash and cash equivalents, beginning of period	37,527	34,125	46,224
Cash and cash equivalents, end of period	36,054	37,527	34,125
Supplemental Disclosure of Cash Flow Information
Cash paid for interest, net of amounts capitalized	66,466	82,914	77,693
Cash paid (received) for income taxes, net	-1,029	1,695	0
Supplemental Disclosure of Non-Cash Investing Activities
Payables for capital expenditures	$54	$0	$0

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Organization
	Marina District Development Company LLC, a New Jersey limited liability company ("MDDC"), is the parent of Marina District Finance Company, Inc., a New Jersey corporation ("MDFC"). MDFC is a 100% owned finance subsidiary of MDDC, which has fully and unconditionally guaranteed MDFC's securities.
	MDDC was incorporated in July 1998 and has been operating since July 3, 2003. MDFC was incorporated in 2000 and has been a wholly-owned subsidiary of MDDC since its inception. We developed, own and operate Borgata Hotel Casino and Spa, including The Water Club at Borgata (collectively, "Borgata"). Borgata is located on a 45.6-acre site at Renaissance Pointe in Atlantic City, New Jersey. Borgata is an upscale destination resort and gaming entertainment property.
	Borgata was developed as a joint venture between Boyd Atlantic City, Inc. ("BAC"), a wholly owned subsidiary of Boyd Gaming Corporation ("Boyd"), and MAC, Corp. ("MAC"), a second tier, wholly owned subsidiary of MGM Resorts International ("MGM"). The joint venture operates pursuant to an operating agreement between BAC and MAC (the "Operating Agreement"), in which BAC and MAC each hold a 50% interest in Marina District Development Holding Co., LLC, MDDC's parent holding company ("MDDHC").
	As managing member of MDDHC pursuant to the terms of the Operating Agreement, BAC, through MDDHC, has responsibility for the oversight and management of our day-to-day operations. We do not presently record a management fee to BAC, as our management team performs these services directly or negotiates contracts to provide for these services. As a result, the costs of these services are directly borne by us and are reflected in our consolidated financial statements. Boyd, the parent of BAC, is a diversified operator of 21wholly owned gaming entertainment properties. Headquartered in Las Vegas, Nevada, Boyd has other gaming operations in Nevada, Illinois, Indiana, Iowa, Kansas, Louisiana and Mississippi.
	On March 24, 2010, MAC transferred its 50% ownership interest (the "MGM Interest") in MDDHC, and certain land leased to MDDC, into a divestiture trust, of which MGM and its subsidiaries are the economic beneficiaries (the "Divestiture Trust") in connection with MGM's settlement agreement with the New Jersey Division of Gaming Enforcement ("NJDGE"). Subsequent to a Joint Petition of MGM, Boyd and MDDC, the NJCCC, on February 13, 2013, approved amendments to the settlement agreement which permitted MGM to file an application for a statement of compliance, which, if approved, would permit MGM to reacquire its interest in MDDC. On September 10, 2014, the NJCCC approved MGM's application. As a result, the Divestiture Trust was dissolved as of September 30, 2014, and MGM reacquired its interest in MDDC as of such date.
	There was no resulting direct impact on our consolidated financial statements from these events.
	Basis of Presentation
	The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") and include the accounts of MDDC and MDFC.
	All intercompany accounts and transactions have been eliminated.
	Cash and Cash Equivalents
	Cash and cash equivalents include highly liquid investments with maturities of three months or less at their date of purchase, and are on deposit with high credit quality financial institutions. The carrying values of these instruments approximate their fair values due to their short maturities.
	Restricted Cash
	Restricted cash consists primarily of advance payments related to amounts restricted by regulation for online gaming purposes. These restricted cash balances are held by high credit quality financial institutions. The carrying value of these instruments approximates their fair value due to their short maturities.
	Accounts Receivable, net
	Accounts receivable consist primarily of casino, hotel and other receivables. Accounts receivable are typically non-interest-bearing and are initially recorded at cost. Accounts are written off when management deems the account to be uncollectible. An estimated allowance for doubtful accounts is maintained to reduce our receivables to their estimated realizable amount. The allowance is estimated based on specific review of customer accounts and management's historical collection experience as well as current economic and business conditions. As a result, the net carrying value approximates fair value.
	The activity comprising our allowance for doubtful accounts is as follows:
		Year Ended December 31,
	(In thousands)	2014			2013			2012
	Beginning balance, January 1	$	20,996		$	22,356		$	23,555
	Additions	4,028			2,824			1,954
	Deductions	(3,532		)	(4,184		)	(3,153		)
	Ending balance, December 31	$	21,492		$	20,996		$	22,356
	Management does not believe that any significant concentration of credit risk existed at December 31, 2014.
	Inventories
	Inventories consist primarily of food and beverage and retail items and are stated at the lower of cost or market. Cost is determined using the average cost method.
	Property and Equipment, net
	Property and equipment are stated at cost. Depreciation is computed using the straight-line method over the estimated useful lives of the assets or, for leasehold improvements, over the shorter of the asset's useful life or term of the lease.
	The estimated useful lives of our major components of property and equipment are:
	Building and improvements	10 to 40 years
	Furniture and equipment	3 to 7 years
	Gains or losses on disposals of assets are recognized as incurred using the specific identification method. Costs of major improvements are capitalized, while costs of normal repairs and maintenance are charged to expense as incurred.
	We evaluate the carrying value of long-lived assets whenever events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. For an asset that is to be disposed of, we recognize the asset at the lower of carrying value or fair market value, less costs of disposal, as estimated based on comparable asset sales, solicited offers, or a discounted cash flow model. For a long-lived asset to be held and used, we review the asset for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. We then compare the estimated undiscounted future cash flows of the asset to the carrying value of the asset. The asset is not impaired if the undiscounted future cash flows exceed its carrying value. If the carrying value exceeds the undiscounted future cash flows, then an impairment charge is recorded, typically measured using a discounted cash flow model, which is based on the estimated future results of the relevant reporting unit discounted using our weighted-average cost of capital and market indicators of terminal year free cash flow multiples. If an asset is under development, future cash flows include remaining construction costs. All resulting recognized impairment charges are recorded as operating expenses.
	No impairment charge was recorded during the year ended December 31, 2014. An impairment charge of $2.8 million was recognized in the year ended December 31, 2012, as a result of the abandonment of a project to construct a parking structure.
	Capitalized Interest
	Interest costs, primarily associated with our expansion projects, are capitalized as part of the cost of our constructed assets. Interest costs, which include commitment fees, letter of credit fees and the amortized portion of deferred financing fees, discounts and origination fees, are capitalized on amounts expended for the respective projects using our weighted-average cost of borrowing. Capitalization of interest will cease when the respective project, or discernible portions of the projects, are substantially complete. We amortize capitalized interest over the estimated useful life of the related asset. No interest was capitalized during the years ended December 31, 2014 and 2013. Capitalized interest for the year ended December 31, 2012 was $0.5 million.
	Debt Financing Costs
	Debt financing costs, which include legal and other direct costs related to the issuance of our outstanding debt, are deferred and amortized to interest expense over the contractual term of the underlying long-term debt using the effective interest method. In the event that our debt is modified, repurchased or otherwise reduced prior to its original maturity date, we ratably reduce the unamortized debt financing costs.
	CRDA Investments
	Pursuant to the New Jersey Casino Control Act ("Casino Control Act"), as a casino licensee, we are assessed an amount equal to 1.25% of our land-based gross gaming revenues in order to fund qualified investments. This assessment is made in lieu of an Investment Alternative Tax ("IAT") equal to 2.5% of land-based gross gaming revenues. The Casino Control Act also provides for an assessment of licensees equal to 2.5% of online gross gaming revenues, which is made in lieu of an IAT equal to 5.0% of online gross gaming revenues. Once our funds are deposited with the New Jersey Casino Reinvestment Development Authority ("CRDA"), qualified investments may be satisfied by: (i) the purchase of bonds issued by the CRDA at below market rates of interest; (ii) direct investment in CRDA-approved projects; or (iii) a donation of funds to projects as determined by the CRDA. According to the Casino Control Act, funds on deposit with the CRDA are invested by the CRDA and the resulting income is shared two-thirds to the casino licensee and one-third to the CRDA. Further, the Casino Control Act requires that CRDA bonds be issued at statutory rates established at two-thirds of market value.
	We are required to make quarterly deposits with the CRDA to satisfy our investment obligations. At the date the obligation arises, we record charges to expense (i) pursuant to the respective underlying agreements for obligations with identified qualified investments and (ii) by applying a one-third valuation reserve to our obligations that are available to fund qualified investments to reflect the anticipated below market return on investment. The one-third valuation reserve is adjusted accordingly, if necessary when a qualified investment is identified. Our deposits with the CRDA, net of valuation reserves held by us, were $9.2 million and $4.6 million as of December 31, 2014 and 2013, respectively, and are included in other assets, net, on our consolidated balance sheets. An impairment charge of $5.0 million was recognized in the year ended December 31, 2013, related to our CRDA investments.
	Loyalty Programs
	We have established promotional programs to encourage repeat business from frequent and active customers. Members earn points based on gaming activity, and such points can be redeemed for a specified period of time, principally for restricted free play slot machine credits and complimentary goods and services. We accrue for earned points expected to be redeemed as a promotional allowance. The accruals are based on estimates and assumptions regarding the mix of restricted free play and complimentary goods and services expected to be redeemed and the costs of providing those benefits. Historical data is used to assist in the determination of the estimated accruals. The points accruals for our loyalty programs are included in accrued liabilities on our consolidated balance sheets.
	Long-Term Debt, Net of Current Maturities
	Long-term debt, net of current maturities is reported at amortized cost. The discount granted to the initial purchasers upon issuance is recorded as an adjustment to the face amount of the debt. The discount is accreted to interest expense using the effective interest method over the term of the underlying debt.
	Self-Insurance Reserves
	We are self-insured for general liability costs up to certain amounts and are self-insured up to certain stop loss amounts for employee health coverage. We are currently self-insured with respect to each catastrophe related property damage claim, non-catastrophe related property damage claim, general liability claim, and non-union employee medical case, respectively. Insurance claims and reserves include accruals of estimated settlements for known claims, as well as accruals of estimates for claims incurred but not yet reported. In estimating these accruals, we consider historical loss experience and make judgments about the expected levels of costs per claim. Management believes the estimates of future liability are reasonable based upon our methodology; however, changes in health care costs, accident frequency and severity and other factors could materially affect the estimate for these liabilities. Certain of these claims represent obligations to make future payments; and therefore we discount such reserves to an amount representing the present value of the claims which will be paid in the future using a blended rate, which represents the inherent risk and the average payout duration. Self-insurance reserves are included in accrued liabilities on our consolidated balance sheets.
		Year Ended December 31,
	(In thousands)	2014			2013			2012
	Beginning balance, January 1	$	11,566		$	9,083		$	8,095
	Charged to costs and expenses	20,045			19,780			18,455
	Payments made	(18,026		)	(17,297		)	(17,467		)
	Ending balance, December 31	$	13,585		$	11,566		$	9,083
	Revenue Recognition
	Gaming revenue represents the net win from gaming activities, which is the aggregate difference between gaming wins and losses. The majority of our gaming revenue is counted in the form of cash and chips and therefore is not subject to any significant or complex estimation procedures. Cash discounts and other incentives to customers related to gaming play are recorded as a reduction of gross gaming revenues as promotional allowances.
	Room revenue recognition criteria are met at the time of occupancy.
	Food and beverage revenue recognition criteria are met at the time of service.
	Promotional Allowances
	The retail value of accommodations, food and beverage, and other services furnished to guests on a complimentary basis is included in gross revenues and then deducted as promotional allowances. Promotional allowances also include incentives such as cash, goods and services (such as complimentary rooms and food and beverages) earned pursuant to our loyalty programs. We reward customers, through the use of loyalty programs, with points based on amounts wagered that can be redeemed for a specified period of time, principally for restricted free play slot machine credits and complimentary goods and services. We record the estimated retail value of these goods and services as revenue and then record a corresponding deduction as promotional allowances.
	The amounts included in promotional allowances are as follows:
		Year Ended December 31,
	(In thousands)	2014			2013			2012
	Rooms	$	71,551		$	71,632		$	71,979
Food and beverage	51,552			51,542			52,859
Other	109,134			94,642			92,479
Total promotional allowances	$	232,237		$	217,816		$	217,317
The estimated costs of providing such promotional allowances are as follows:
	Year Ended December 31,
(In thousands)	2014			2013			2012
Rooms	$	21,729		$	21,440		$	23,066
Food and beverage	40,894			39,774			42,067
Other	11,579			10,972			11,584
Total cost of promotional allowances	$	74,202		$	72,186		$	76,717
Gaming Taxes
We are subject to an annual tax assessment based on gross gaming revenues of 8% on our land-based gross gaming revenues and 15% on our online gross gaming revenues. These gaming taxes are recorded as a gaming expense in the consolidated statements of operations. These taxes were $51.9 million, $45.4 million and $44.3 million during the years ended December 31, 2014, 2013 and 2012, respectively.
Income Taxes
As a single member limited liability company, MDDC is treated as a disregarded entity for federal income tax purposes. As such, it is not subject to federal income tax and its income is treated as earned by its member, MDDHC. MDDHC is treated as a partnership for federal income tax purposes and federal income taxes are the responsibility of its members. In New Jersey, casino partnerships are subject to state income taxes under the Casino Control Act; therefore, MDDC, considered a casino partnership, is required to record New Jersey state income taxes. In 2004, MDDC was granted permission by the state of New Jersey, pursuant to a ruling request, to file a consolidated New Jersey corporation business tax return with the members of its parent, MDDHC. The amounts reflected in the condensed consolidated financial statements are reported as if MDDC was taxed for state purposes on a stand-alone basis; however, MDDC files a consolidated state tax return with the members of MDDHC. Under the terms of the tax sharing agreement between MDDC and the members of its parent, current year tax attributes of the members are utilized prior to MDDC’s separately determined net operating loss carryforward.  The utilization of the current year member tax attributes in 2014 resulted in an income tax payable of $4.1 million that will be remitted to the members of MDDHC under the tax sharing agreement.
The amounts due to these members are a result of each member's respective tax attributes included in the consolidated state tax return. A reconciliation of the components of our stand-alone state income taxes payable (receivable) is presented below:
	December 31,
(In thousands)	2014			2013
Amounts payable to members of MDDHC	$	4,148		$	—
Amounts receivable - State	(5		)	(1,037		)
Income taxes payable (receivable), net	$	4,143		$	(1,037	)
Advertising Expense
Direct advertising costs are expensed the first time such advertising appears. Advertising costs are included in selling, general and administrative expenses on the consolidated statements of operations and totaled $22.9 million, $14.1 million and $15.1 million for the years ended December 31, 2014, 2013 and 2012, respectively.
Preopening Expenses
Certain costs of start-up activities were expensed as incurred. During the years ended December 31, 2014, 2013 and 2012, we expensed $0.3 million, $4.1 million and $0.2 million, respectively. The preopening expenses incurred during 2014 were related primarily to our internet gaming initiative.
Other Operating Items, net
Other operating items, net, generally includes unusual, nonrecurring charges and credits. The net credit of $1.7 million for the year ended December 31, 2014, includes recoveries resulting from the receipt of insurance proceeds related to the fire that occurred during the construction of The Water Club in 2007 of $2.2 million. Other operating items, net, for the year ended December 31, 2013, totaled $3.3 million, including $2.1 million for self-insurance reserve adjustments related to prior periods. Other operating items, net, for the year ended December 31, 2012, reflected a net credit of $7.7 million, which was comprised of a gain of $3.8 million related to the subrogated insurance settlement related to the fire that occurred during the construction of The Water Club in 2007, and a gain of $3.8 million from business interruption proceeds due to the mandated closure of the property in August 2011 related to Hurricane Irene.
Concentrations of Credit Risk
Financial instruments that subject the Company to credit risk consist of cash equivalents, accounts receivable and CRDA deposits. The Company's policy is to limit the amount of credit exposure to any one financial institution, and place investments with financial institutions evaluated as being creditworthy, or in short-term money market funds which are exposed to minimal interest rate and credit risk. The Company has bank deposits which may at times exceed federally-insured limits.
Concentrations of credit risk, with respect to gaming receivables, are limited through the Company's credit evaluation process. The Company issues markers to approved gaming customers only following credit checks and investigations of creditworthiness.
Certain Risks and Uncertainties
The Company's operations are dependent on its continued licensing by the state gaming commission. The loss of our license could have a material adverse effect on future results of operations. The Company is dependent on geographically local markets for a significant number of its customers and revenues. If economic conditions in these areas deteriorate or additional gaming licenses are awarded in these markets, the Company's results of operations could be adversely affected. The Company is dependent on the economy of the United States, in general, and any deterioration in the national economic, energy, credit and capital markets could have a material adverse effect on future results of operations.
Use of Estimates
The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.
Reclassification
Certain prior period amounts presented on our consolidated balance sheets have been reclassified to conform to the current year presentation. The reclassification is related to long-term tax liabilities totaling $3.2 million reclassified from other long-term tax liabilities to other liabilities in our consolidated balance sheet for the year ended December 31, 2013. This reclassification had no effect on our total liabilities and member equity as previously reported.
Recently Issued Accounting Pronouncements
Accounting Standards Update 2014-17 ASC 805 Business Combinations ("Update 2014-17")
In November 2014, the FASB issued Update 2014-17, which provides guidance on whether and at what threshold an acquired entity that is a business or nonprofit activity can apply pushdown accounting in its separate financial statements. The pronouncement was effective on November 18, 2014. The impact of the adoption of Update 2014-17 did not have an effect on our consolidated financial statements.
Accounting Standards Update 2014-15 Disclosure of Uncertainties About an Entity's Ability to Continue as a Going Concern ("Update 2014-15")
In August 2014, the FASB issued Update 2014-15, which provides guidance on determining when and how reporting entities must disclose going-concern uncertainties in their financial statements. The pronouncement is effective for annual periods ending after December 15, 2016, and interim periods thereafter, and early adoption is permitted. The impact of the adoption of Update 2014-15 is currently under evaluation.
Accounting Standards Update 2014-09 Revenue from Contracts with Customers (Topic 606) ("Update 2014-09")
In May 2014, the FASB issued Update 2014-09. Update 2014-09 outlines a new, single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The pronouncement is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, and early adoption is not permitted. The impact of the adoption of Update 2014-09 to the Company's consolidated financial position or results of operations is currently under evaluation.
A variety of proposed or otherwise potential accounting standards are currently being studied by standard-setting organizations and certain regulatory agencies. Because of the tentative and preliminary nature of such proposed standards, we have not yet determined the effect, if any, that the implementation of such proposed standards would have on our consolidated financial statements.

Property_and_Equipment_Net

Property and Equipment, Net	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Property and Equipment, Net	PROPERTY AND EQUIPMENT, NET
	Property and equipment, net, consists of the following:
		December 31,
	(In thousands)	2014		2013
	Land	$	87,301	$	87,301
	Buildings and improvements	1,420,467		1,416,432
	Furniture and equipment	321,459		314,610
	Construction in progress	9,569		5,533
	Total property and equipment	1,838,796		1,823,876
	Less accumulated depreciation	665,574		610,942
	Property and equipment, net	$	1,173,222	$	1,212,934
	Depreciation expense was $58.5 million, $60.0 million and $63.4 million during the years ended December 31, 2014, 2013 and 2012, respectively.
	Construction in progress presented in the table above primarily relates to costs capitalized in conjunction with major improvements that have not yet been placed into service, and accordingly, such costs are not currently being depreciated.

Accrued_Liabilities

Accrued Liabilities	12 Months Ended
	Dec. 31, 2014
Accrued Liabilities [Abstract]
Accrued Liabilities	ACCRUED LIABILITIES
	Accrued liabilities consist of the following:
		December 31,
	(In thousands)	2014		2013
	Payroll and related	$	22,546	$	20,736
	Interest	15,205		15,840
	Gaming liabilities	25,463		20,714
	Player loyalty program liabilities	4,963		4,320
	General liability claims	11,212		9,601
	Other accruals	25,571		26,884
	Total accrued liabilities	$	104,960	$	98,095

Longterm_Debt_Net

Long-term Debt, Net	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Long-term Debt, Net	LONG-TERM DEBT
	Long-term debt, net of current maturities, consists of the following:
				December 31, 2014
	(In thousands)	Interest Rates at Dec. 31, 2014		Outstanding Principal			Unamortized Discount			Unamortized Origination Fees			Long-Term Debt, Net
	Revolving Credit Facility	4.1	%	$	13,700		$	—		$	—		$	13,700
	Incremental Term Loan	6.75	%	347,700			(2,701		)	—			344,999
	9.875% Senior Secured Notes due 2018	9.88	%	393,500			(1,488		)	(5,392		)	386,620
				754,900			(4,189		)	(5,392		)	745,319
	Less current maturities			3,800			—			—			3,800
	Long-term debt, net			$	751,100		$	(4,189	)	$	(5,392	)	$	741,519
				31-Dec-13
	(In thousands)	Interest Rates at Dec. 31, 2013		Outstanding Principal			Unamortized Discount			Unamortized Origination Fees			Long-Term Debt, Net
	Revolving Credit Facility	3.86	%	$	39,900		$	—		$	—		$	39,900
	Incremental Term Loan	6.75	%	380,000			(3,766		)	—			376,234
	9.875% Senior Secured Notes due 2018	9.88	%	393,500			(1,811		)	(6,563		)	385,126
				813,400			(5,577		)	(6,563		)	801,260
	Less current maturities			3,800			—			—			3,800
	Long-term debt, net			$	809,600		$	(5,577	)	$	(6,563	)	$	797,460
	Bank Credit Facility
	Significant Terms
	On July 24, 2013, MDFC entered into an Amended and Restated Credit Agreement (the "Credit Facility") with MDDC, certain financial institutions, and Wells Fargo Bank, National Association, as administrative agent, letter of credit issuer and swing line lender. The Credit Facility replaces the Credit Agreement, dated as of August 6, 2010, among MDFC, MDDC, various lenders and Wells Fargo Bank, National Association, as administrative agent, letter of credit issuer and swing line lender, as amended (the "Prior Credit Facility"), which provided for the bank credit facility.
	The Credit Facility provides for a $60 million senior secured revolving credit facility including a $15.0 million swing loan sublimit (the "Revolving Credit Facility") which matures in February 2018 (or earlier upon the occurrence or non-occurrence of certain events). A portion of the availability under the Revolving Credit Facility was used to repay obligations outstanding under the Prior Credit Facility.
	The Credit Facility includes an accordion feature which permits an increase in the Revolving Credit Facility in an amount not to exceed $15 million. We exercised this feature in fourth quarter 2014 to increase our Revolving Credit Facility by $10 million. The Credit Facility provides for a $70 million senior secured Revolving Credit Facility which matures in February 2018 (or earlier upon the occurrence or non-occurrence of certain events). The accordion feature also allows for the issuance of senior secured term loans to refinance the MDFC's 9.875% Senior Secured Notes due 2018 (the "2018 Notes") outstanding pursuant to the Indenture, subject to the satisfaction of certain conditions.
	Amounts Outstanding
	The outstanding principal amounts under the Revolving Credit Facility are comprised of the following:
		December 31,
	(In thousands)	2014			2013
	Revolving Credit Facility	$	5,000		$	35,000
	Swing Loan	8,700			4,900
	Total outstanding principal amounts under the Revolving Credit Facility	$	13,700		$	39,900
	At December 31, 2014, after consideration of $4.8 million allocated to support a letter of credit, remaining contractual availability under the Revolving Credit Facility was $51.5 million.
	Interest and Fees
	Outstanding borrowings under the Revolving Credit Facility including those borrowings under the swing loan accrue interest, at the option of MDFC, at a rate based upon either: (i) the highest of (a) the agent bank's quoted prime rate, (b) the one-month Eurodollar rate plus 1.00%, and (c) the daily federal funds rate plus 0.50%, or (ii) the Eurodollar rate, plus with respect to each of clause (i) and (ii), an applicable margin as specified in the Revolving Credit Facility. In addition, a commitment fee is incurred on the unused portion of the Revolving Credit Facility ranging from 0.50% per annum to 0.75% per annum.
	Guarantees and Collateral
	The Revolving Credit Facility is guaranteed on a senior secured basis by MDDC and any future subsidiaries of MDDC and is secured by a first priority lien on substantially all of the assets of MDFC, MDDC and any future subsidiaries of MDDC, subject to certain exceptions. The obligations under the Revolving Credit Facility will have priority in payment to the payment of the 2018 Notes. Neither BAC, its parent, its affiliates, nor MAC are guarantors of the credit facility.
	Financial and Other Covenants
	The Revolving Credit Facility contains customary affirmative and negative covenants, including but not limited to, (i) establishing a minimum Consolidated EBITDA (as defined in the Revolving Credit Facility) of $110 million over each trailing twelve-month period ending on the last day of each calendar quarter; (ii) imposing limitations on MDFC's and MDDC's ability to incur additional debt, create liens, enter into transactions with affiliates, merge or consolidate, and engage in unrelated business activities; and (iii) imposing restrictions on MDDC's ability to make restricted payments, other than those allowed by the Credit Facility ("Borgata Restricted Payments"). Borgata Restricted Payments primarily include (i) the Tax Amount (as defined in the Credit Facility), so long as Borgata remains a pass-through entity for United States federal income tax purposes, and (ii) cash dividends to the extent no event of default would be caused, financial covenants would not exceed or be outside of applicable ratios.
	Debt Financing Costs
	In conjunction with the bank credit facility and the amendment thereto, during the years ended December 31, 2014, 2013 and 2012, we incurred incremental debt financing costs of $0.3 million, $10.1 million and $0.4 million, respectively, related to the bank credit facility which have been deferred and are being amortized over the remaining term of the bank credit facility.
	During the year ended December 31, 2013, we recognized a $0.5 million loss on early extinguishments of debt to write-off the remaining, unamortized deferred finance charges related to the Prior Credit Facility.
	During the year ended December 31, 2012, we accelerated the amortization of approximately $0.1 million of the outstanding deferred loan fees, which adjusted the fees by an amount representing the pro rata reduction in borrowing capacity under our Prior Credit Facility.
	Incremental Term Loan
	On December 16, 2013, MDFC entered into a Lender Joint Agreement (the "Incremental Term Loan"), among MDDC, Wells Fargo Bank, National Association, as administrative agent, and Deutsche Bank AG New York Branch, as incremental term lender. The Incremental Term Loan increased the term commitments under the Revolving Credit Facility by an aggregate amount of $380.0 million. The Incremental Term Loan was fully funded on December 16, 2013, and proceeds were used to repay MDFC’s outstanding 2015 Notes.
	The interest rate per annum applicable to the Incremental Term Loan is either (a) the Effective Eurodollar Rate (the greater of the Eurodollar Rate in effect for such interest period and 1.00%) plus the Term Loan Applicable Rate (ranging from 5.50% to 5.75%) if and to the extent the Incremental Term Loan is a Eurodollar Rate Loan under the Revolving Credit Facility, or (b) the Base Rate (Effective Eurodollar Rate for one month plus 1.00%) plus the Term Loan Applicable Rate (ranging from 4.50% to 4.75%) if and to the extent the Incremental Term Loan is a Base Rate Loan under the Revolving Credit Facility. The Incremental Term Loan was issued with 1.00% of original issue discount.
	The Incremental Term Loan requires fixed quarterly amortization of principal equal to 0.25% of the original principal amount of the Incremental Term Loan beginning March 31, 2014. The remaining outstanding principal amount of the Incremental Term Loan is required to be paid on August 15, 2018. We prepaid $32.3 million of the Incremental Term Loan during the year ended December 31, 2014, and recognized a $0.7 million loss on early extinguishments of debt related to the prepayment.
	With some exceptions, in the event of a full or partial prepayment of the Incremental Term Loan prior to the second anniversary of the funding of the Incremental Term Loan, such prepayment will include a premium in an amount equal to (a) 2.00% of the principal amount so prepaid, in the case of any such prepayment prior to the first anniversary of the funding of the Incremental Term Loan and (b) 1.00% of the principal amount so prepaid, in the case of any such prepayment on or after the first anniversary of the funding of the Incremental Term Loan but prior to the second anniversary of the funding of the Incremental Term Loan.
	Original Issue Discount
	The original issue discount has been recorded as an offset to the principal amount of the Incremental Term Loan and is being accreted to interest expense over the term of the loan using the effective interest method. At December 31, 2014, the effective interest rate on the Incremental Term Loan was 6.9%.
	9.875% Senior Secured Notes Due 2018
	Significant Terms
	In August 2010, MDFC issued, through a private placement, $400 million principal amount of 2018 Notes, at an issue price of 99.315%, resulting in an original issue discount of $2.7 million. The 2018 Notes require semi-annual interest payments on February 15 and August 15, which commenced on February 15, 2011. The 2018 Notes are guaranteed on a senior secured basis by MDDC and any future restricted subsidiaries of MDDC. The 2018 Notes contain covenants that, among other things, limit MDFC's ability and the ability of MDDC to (i) incur additional indebtedness or liens; (ii) pay dividends or make distributions; (iii) make certain investments; (iv) sell or merge with other companies; and (v) enter into certain types of transactions.
	MDFC shall have the option to redeem the 2018 Notes, in whole or in part, at redemption prices (expressed as percentages of the principal amount) ranging from 104.938% beginning on August 15, 2014, to 102.469% beginning on August 15, 2015, to 100% beginning on August 15, 2016 and thereafter, plus accrued and unpaid interest, to the applicable redemption date.
	Original Issue Discount
	The original issue discount has been recorded as an offset to the principal amount of these notes and is being accreted to interest expense over the term of the notes using the effective interest method. At December 31, 2014, the effective interest rate on the 2018 Notes was 10.4%.
	Indenture
	The indenture governing the 2018 Notes allows for the incurrence of additional indebtedness, if after giving effect to such incurrence, our coverage ratio (as defined in the indenture, essentially a ratio of Consolidated EBITDA to fixed charges, including interest) for a trailing four quarter period on a pro forma basis would be at least 2.0 to 1.0. Such pro forma coverage ratio was above 2.0 to 1.0 at December 31, 2014.
	Loss on Early Extinguishments of Debt
	During the year ended December 31, 2014, we recognized a $0.7 million loss on early extinguishments of debt related to early payments made on the Incremental Term Loan, as previously mentioned. During the year ended December 31, 2013, we recognized a $25.3 million loss on early extinguishments of debt related to the repurchase and retirement of the 2015 Notes, in addition to the previously mentioned $0.5 million loss on early extinguishments of debt related to the Prior Credit Facility.
	Covenant Compliance
	As of December 31, 2014, we believe that we were in compliance with the financial and other covenants of our debt instruments.
	Scheduled Maturities of Long-Term Debt
	The scheduled maturities of long-term debt, as discussed above, are as follows:
	For the Year Ending December 31,	(In thousands)
	2015	$	3,800
2016	3,800
2017	3,800
2018	743,500
2019	—
Thereafter	—
Total outstanding principal of long-term debt	$	754,900

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES
	Provision for (Benefit from) State Income Taxes
	A summary of the provision for (benefit from) state income taxes is as follows:
		December 31,
	(In thousands)	2014				2013				2012
	State
	Current	$	4,152			$	2			$	57
	Deferred	(753		)		(4,505		)		(1,310		)
	Provision for (benefit from) state income taxes	$	3,399			$	(4,503	)		$	(1,253	)
	The following table provides a reconciliation between the state statutory rate and the effective income tax rate where both are expressed as a percentage of income:
		December 31,
		2014			2013			2012
	Tax provision at state statutory rate	9	%		9	%		9	%
	Accrued interest on uncertain tax benefits	3.2			(1.5	)		(2.1	)
	New jobs investment tax credit	—			—			(1.9	)
	Other, net	0.3			(0.1	)		(0.3	)
	Total state income tax provision	12.5	%		7.4	%		4.7	%
	Deferred Tax Assets and Liabilities
	Deferred tax assets and liabilities are provided to record the effects of temporary differences between the tax basis of an asset or liability and its amount as reported in our consolidated balance sheets. These temporary differences result in taxable or deductible amounts in future years.
	The components comprising the Company's net deferred state tax liability are as follows:
		December 31,
	(In thousands)	2014				2013
	Deferred state tax assets
	Net operating loss carryforward	$	3,037			$	9,257
	Provision for doubtful accounts	1,490				1,466
	Reserve for employee benefits	1,454				1,150
	Accrued expenses	1,031				921
	Interest accrued on uncertain tax benefits	580				492
	Other	704				765
	Gross deferred state tax assets	8,296				14,051
	Deferred state tax liabilities
	Difference between book and tax basis of property	10,215				17,728
	Prepaid services and supplies	825				657
	Other	193				227
	Gross deferred state tax liabilities	11,233				18,612
	Net deferred state tax liabilities	$	2,937			$	4,561
	At December 31, 2014, we have a state income tax net operating loss of approximately $33.7 million which may be carried forward or used until expiration beginning in 2032.
	The items comprising our deferred state income taxes as presented on our consolidated balance sheets are as follows:
		Year Ended December 31,
	(In thousands)	2014				2013
	Non-current deferred income tax liability	$	6,315			$	7,049
	Current deferred income tax asset	(3,378		)		(2,488		)
	Net deferred state tax liability	$	2,937			$	4,561
	In connection with our formation in 2000, MAC contributed assets consisting of land and South Jersey Transportation Authority bonds with a tax basis of approximately $9.2 million and $13.8 million, respectively. The recorded book value of those assets was $90 million. Pursuant to the Joint Venture and Tax Sharing Agreements between BAC and MAC, any subsequent gain or loss associated with the sale of the MAC contributed property would be allocated directly to MAC for both state and federal income tax purposes. As such, no state deferred tax liability has been recorded in connection with the book and tax basis differences related to the MAC contributed property.
	Accounting for Uncertain Tax Positions
	The impact of an uncertain income tax position on the income tax return must be recognized at the largest amount that is more-likely-than-not to be sustained upon audit by the relevant taxing authority. An uncertain income tax position will not be recognized if it has less than a 50% likelihood of being sustained. Accounting guidance, which is applicable to all income tax positions, provides direction on derecognition, classification, interest and penalties, accounting in interim periods and disclosure.
	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
		Year Ended December 31,
	(In thousands)	2014				2013				2012
	Unrecognized tax benefit, January 1	$	6,221			$	6,225			$	9,068
	Additions based on tax positions related to current year	1				1				10
	Additions based on tax positions related to prior years	—				—				—
	Reductions based on tax positions settled with taxing authorities	—				—				(1,078		)
	Reductions based on tax positions related to prior years	(5		)		(5		)		(1,775		)
	Unrecognized tax benefit, December 31	$	6,217			$	6,221			$	6,225
	Included in the $6.2 million balance of unrecognized tax benefits at December 31, 2014 are $6.0 million of tax benefits that, if recognized, would affect the effective tax rate and $0.2 million of tax benefits that, if recognized, would result in adjustments to other tax accounts, primarily deferred taxes.
	We recognize accrued interest and penalties related to unrecognized tax benefits in the income tax provision. During each of the years ended December 31, 2014 and 2013, we recognized accrued interest and penalties of approximately $0.5 million. During the year ended December 31, 2012, we recognized interest related benefits, due to the state impact of favorable federal settlements, of $0.5 million in our tax provision. We have $3.5 million and $3.0 million for the payment of interest and penalties accrued at December 31, 2014 and 2013, respectively.
	Status of Examinations
	We are subject to state taxation in New Jersey and our state tax returns are subject to examination for tax years ended on or after December 31, 2001. Statute expirations, related to state income tax returns filed for years prior to December 31, 2010 have been extended to July 31, 2015. The statute of limitations for all remaining state income tax returns will expire over the period October 2015 through October 2019. As we are a partnership for federal income tax purposes, we are not subject to federal income tax.
	In January 2015, we received Joint Committee on Taxation ("Joint Committee") approval of our 2005-2009 IRS appeals settlement reached in August 2013. During 2013 we settled our federal income tax audit related to tax returns filed for the years ended December 31, 2003 and 2004; and effectively settled a portion of our federal income tax audit for returns filed for the years ended 2005 through 2009. Adjustments related to our federal examination affect the members of MDDHC, as we are not subject to federal income tax. We have recorded the expected state tax impact to our unrecognized tax benefits of certain federal income tax adjustments that have been settled with the IRS, for which the state and federal tax treatment should be consistent. The audit adjustments relate primarily to the appropriate class lives of certain depreciable assets. The state tax impact of the federal audit adjustments approved by the Joint Committee in January will be recorded in the first quarter of 2015. The state tax impact of the 2003-2004 federal exam settlements resulted in a reduction to our unrecognized tax benefit in 2012 of $2.9 million. Additionally, our New Jersey state income tax returns for the years ended December 31, 2003 through December 31, 2009 are under audit by the New Jersey Division of Taxation. It is reasonably possible over the next twelve-month period that we may experience a decrease in our unrecognized tax benefits, as of December 31, 2014, in an amount up to $6.2 million, substantially all of which would impact our effective tax rate.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES
	Commitments
	Utility Contract
	In 2005, we amended our executory contracts with a wholly-owned subsidiary of a local utility company, extending the end of the terms to 20 years from the opening of The Water Club. The utility company provides us with electricity and thermal energy (hot water and chilled water). Obligations under the thermal energy executory contract contain both fixed fees and variable fees based upon usage rates. The fixed fee components under the thermal energy executory contract are currently estimated at approximately $11.7 million per annum. We also committed to purchase a certain portion of our electricity demand at essentially a fixed rate, which is estimated at approximately $1.7 million per annum. Electricity demand in excess of the commitment is subject to market rates based on our tariff class.
	Investment Alternative Tax
	The New Jersey state law provides, among other things, for an assessment of licensees equal to 1.25% of land-based gross gaming revenues in lieu of an investment alternative tax equal to 2.5% of land-based gross gaming revenues and for an assessment of licensees equal to 2.5% of online gross gaming revenues in lieu of an IAT equal to 5.0% of online gross gaming revenues. Generally, we may satisfy this investment obligation by investing in qualified eligible direct investments, by making qualified contributions or by depositing funds with the CRDA. Funds deposited with the CRDA may be used to purchase bonds designated by the CRDA or, under certain circumstances, may be donated to the CRDA in exchange for credits against future CRDA investment obligations. CRDA bonds have terms up to fifty years and bear interest at below market rates.
	Our CRDA obligations for the years ended December 31, 2014, 2013 and 2012 were $9.1 million, $7.8 million and $7.7 million, respectively, of which valuation provisions of $2.4 million, $2.2 million and $4.4 million, respectively, were recorded due to the respective underlying agreements.
	In order to address the shrinking property tax base caused by reduced valuations and the closures of four Atlantic City casinos in 2014, city and state officials have proposed a Payment In Lieu of Taxes (“Pilot”) program. Under such proposed legislation, each Atlantic City casino would be required to make an allocated annual lump sum payment for a 15 year period. Additional proposed legislation would redirect $25 million to $30 million in certain casino IAT collections to municipal debt payments. Currently, the CRDA utilizes these IAT funds for development projects in Atlantic City.
	Atlantic City Tourism District
	As part of the State of New Jersey's plan to revitalize Atlantic City, a new law was enacted in February 2011 requiring that a tourism district (the "Tourism District") be created and managed by the CRDA. The Tourism District has been established to include each of the Atlantic City casino properties along with certain other tourism related areas of Atlantic City. The law requires that a public-private partnership be created between the CRDA and a private entity that represents existing and future casino licensees. The private entity, known as The Atlantic City Alliance (the "ACA"), has been established in the form of a not-for-profit limited liability company, of which MDDC is a member. The public-private partnership between the ACA and CRDA shall be for an initial term of five years and its general purpose shall be to revitalize the Tourism District. The law requires that a $5 million contribution be made to this effort by all casinos prior to 2012 followed by an annual amount of $30 million to be contributed quarterly by the casinos commencing January 1, 2012 for a term of five years. Each casino's share of the quarterly contributions will equate to a percentage representing its gross gaming revenue for each corresponding period compared to the aggregate gross gaming revenues for that period for all casinos. As a result, we will expense our pro rata share of the $155 million as incurred.
	Pending proposed Pilot program legislation, the ACA would be eliminated; however, the remaining two years of the $30 million annual funding would be redirected to help stabilize the Atlantic City budget under the potential legislation. During the years ended December 31, 2014, 2013 and 2012, we incurred expenses of $7.4 million, $6.5 million and $6.1 million, respectively, for our pro rata share of the contributions to the ACA.
	Leases
	As of December 31, 2014, MDDC owns approximately 26 acres of land and all improvements thereon with respect to that portion of the property consisting of the Borgata hotel. In addition, MDDC, as lessee, entered into a series of ground leases for a total of approximately 20 acres of land on which our existing employee parking garage, public space expansion, rooms expansion, and modified surface parking lot reside, as well as, an undeveloped parcel. All of these parcels were originally leased from MAC. Following the 2010 sale of several of the leased parcels by MAC to a third party, now only the surface parking lease is with MAC. The lease terms extend until December 31, 2070 with the exception of the surface parking lot lease which could be terminated by either party effective on the last day of the month that is three months after notice is given. The leases consist of:
	•	Lease and Option Agreement, dated as of January 16, 2002, as amended by the Modification of Lease and Option Agreement, dated as of August 20, 2004, and the Second Modification of Employee Parking Structure Lease and Option Agreement, dated March 23, 2010, for approximately 2 acres of land underlying the parking garage (the "Parking Structure Ground Lease");
	•	Expansion Ground Lease, dated as of January 1, 2005, as amended by the Modification of Expansion Ground Lease, dated March 23, 2010, for approximately 4 acres of land underlying the Public Space Expansion (the "Public Space Expansion Ground Lease");
	•	Tower Expansion & Additional Structured Parking Ground Lease Agreement, dated as of January 1, 2005, as amended by the Modification of Tower Expansion & Additional Structured Parking Ground Lease Agreement, dated February 20, 2010, and the Second Modification of Tower Expansion & Additional Structured Parking Ground Lease Agreement, dated March 23, 2010, for approximately 2 acres of land underlying the Rooms Expansion and 3 acres of land underlying a parking structure each (the "Rooms Expansion Ground Lease");
	•	Surface Lot Ground Lease, dated as of August 20, 2004, as amended by a letter agreement, dated April 10, 2009, a letter agreement dated September 21, 2009, the Modification of Surface Lot Ground Lease, dated March 23, 2010, and the Amendment to the Surface Lot Ground Lease dated November 7, 2013, for approximately 8 acres of land consisting of the surface parking lot (collectively, the "Surface Parking Lot Ground Lease"); and
	•	The Ground Lease Agreement, dated as of March 23, 2010, for approximately 1 acre of undeveloped land. On March 3, 2015, we announced plans to build an outdoor entertainment venue to host concerts and festivals on the undeveloped land. Construction is expected to be completed in early summer 2015.
	MDDC owns all improvements made on the leased lands during the term of each ground lease. Upon expiration of such term, ownership of such improvements reverts back to the landlord. Total rent incurred under the ground leases was $6.1 million for each of the years ended December 31, 2014 and 2013, and $5.8 million for the year ended December 31, 2012. In addition, MDDC is responsible for all property taxes assessed on the leased properties. Total property taxes incurred for ground lease agreements were $9.2 million, $18.3 million and $15.6 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	If during the term of the Parking Structure Ground Lease, the Rooms Expansion Ground Lease, the Public Space Expansion Ground Lease or the Ground Lease Agreement, the third party landlord ("Landlord") or any person associated with the Landlord is found by the NJCCC to be unsuitable to be associated with a casino enterprise and such person is not removed from such association in a manner acceptable to the NJCCC, then MDDC may, upon written notice to the Landlord, elect to purchase the leased land for the appraised value as determined under the terms of such ground leases, unless the Landlord elects, upon receipt of such notice, to sell the land to a third party, subject to the ground leases. If the Landlord elects to sell the land to a third party but is unable to do so within one year, then the Landlord must sell the land to MDDC for the appraised value.
	In addition, MDDC has an option to purchase the land leased under the Parking Structure Ground Lease at any time during the term of that lease so long as it is not in default thereunder, at fair market value as determined in accordance with the terms of the Parking Structure Ground Lease. In the event that the land underlying the Surface Parking Lot Ground Lease is sold to a third party, MDDC has the option to build a parking garage, if necessary, to replace the lost parking spaces on the land underlying the Ground Lease Agreement.
	Pursuant to the Operating Agreement, MAC is responsible for its allocable share of expenses related to master plan and government improvements at Renaissance Pointe. The related amounts due from MAC for these types of expenditures incurred by us were $0.2 million and $0.3 million at December 31, 2014 and 2013, respectively. Reimbursable expenditures incurred were $0.7 million for both years ended December 31, 2014, and 2013, and $0.6 million for the year ended December 31, 2012.
	Future Minimum Lease Payments and Rental Income
	Future minimum lease payments required under noncancelable operating leases (principally for land, see above and Note 10, Related Party Transactions) as of December 31, 2014 are as follows:
	For the Year Ending December 31,	(In thousands)
	2015	$	8,258
	2016	7,288
	2017	6,705
	2018	6,573
	2019	6,280
	Thereafter	320,289
	Total	$	355,393
	For the years ended December 31, 2014, 2013 and 2012, total rent expense was $15.9 million, $14.7 million and $13.8 million, respectively, which were included in Selling, General and Administrative accounts in the consolidated statements of operations.
	Future minimum rental income, which is primarily related to retail and restaurant facilities located within our property, as of December 31, 2014 is as follows:
	For the Year Ending December 31,	(In thousands)
	2015	$	1,753
	2016	1,525
	2017	1,444
	2018	1,444
	2019	1,444
	Thereafter	5,232
	Total	$	12,842
	For the years ended December 31, 2014, 2013 and 2012 , total rent income was $2.7 million, $3.1 million and $3.3 million, respectively, which is recorded as other revenue in the consolidated statements of operations.
	Contingencies
	Borgata Property Taxes
	We have filed tax appeal complaints, in connection with our property tax assessments for tax years 2009 through 2014, in New Jersey Tax Court ("Tax Court"). The trial for tax years 2009 and 2010 was held during the second quarter of 2013 and a decision was issued on October 18, 2013. The assessor valued our real property at approximately $2.3 billion. The Tax Court found in our favor and reduced our real property valuation to $880 million and $870 million for tax years 2009 and 2010, respectively. The City of Atlantic City (the "City") filed an appeal in the New Jersey Superior Court - Appellate Division ("Appellate Court") in November 2013. No trial date has been set for the Appellate Court hearing. We have paid our property tax obligations consistent with the assessor’s valuation and based on the Tax Court’s decision, we estimate the 2009 and 2010 property tax refunds and related statutory interest will be approximately $49.0 million and $12.0 million, respectively. There can be no assurances that the Tax Court’s decision in the 2009-2010 appeal will be upheld at the appellate level. Due to the uncertainty surrounding the ultimate resolution of the City’s appeal, we will not recognize any gain until a final, non-appealable decision has been rendered.
	On June 5, 2014, we entered into a settlement agreement with the City. The agreement resolved the tax appeal complaints we filed in connection with property tax assessments for tax years 2011 through 2014. Under the terms of the agreement, we are entitled to receive a tax refund of $88.25 million for tax years 2011 through 2013, as well as a tax credit of $19.25 million for tax year 2014, resulting from a reduced property tax valuation relative to 2013. Additionally, the City has agreed to a defined property tax valuation for tax year 2015. Although the tax rate for 2015 is unknown, we believe that the revised valuation will result in significantly lower real estate taxes as compared to 2013. In exchange, we have agreed to relinquish our right to further contest the property tax assessments for tax years 2011 through 2015, contingent upon the City fulfilling its obligations under the agreement. The agreement does not affect the pending appeals of the property tax assessments for tax years 2009 and 2010. Per the terms of the agreement, the City intends to fulfill its obligation to pay the refund to us through a bond issuance. The ordinance to issue the bonds was approved by applicable state and local agencies in September 2014; however, the occurrence and timing of such issuance continues to be subject to general market conditions. In the event that the City does not issue bonds, or otherwise fails to pay the refund, we retain our right to compel a trial on the filed appeals. We cannot be certain that the City will issue bonds or fund their obligations under the agreement through other sources. Due to this uncertainty, we will not record the recovery of the $88.25 million in previously paid property taxes until the City has successfully issued bonds or obtained other dedicated sources of funding in an amount sufficient to pay the refund for tax years 2011-2013 per the terms of the agreement.
	Legal Matters
	We are subject to various claims and litigation in the ordinary course of business. In our opinion, all pending legal matters are either adequately covered by insurance, or if not insured, will not have a material impact on our financial position, results of operations or cash flows.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS
	The authoritative accounting guidance for fair value measurements defines fair value, expands disclosure requirements around fair value and specifies a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company's market assumptions.
	These inputs create the following fair value hierarchy:
	•	Level 1: Quoted prices for identical instruments in active markets.
	•	Level 2: Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets.
	•	Level 3: Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable.
	As required by the guidance for fair value measurements, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Thus, assets and liabilities categorized as Level 3 may be measured at fair value using inputs that are observable (Levels 1 and 2) and unobservable (Level 3). Management's assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of assets and liabilities and their placement within the fair value hierarchy levels.
	Balances Measured at Fair Value
	The following tables show the fair values of certain of our financial instruments:
		December 31, 2014
	(In thousands)	Balance			Level 1			Level 2		Level 3
	Assets
	Cash and cash equivalents	$	36,054		$	36,054		$	—	$	—
	Restricted cash	5,676			5,676			—		—
	CRDA investments, net	9,158			—			—		9,158
		December 31, 2013
	(In thousands)	Balance			Level 1			Level 2		Level 3
	Assets
	Cash and cash equivalents	$	37,527		$	37,527		$	—	$	—
	CRDA investments, net	4,613			—			—		4,613
	The fair value of our cash and cash equivalents and restricted cash, classified in the fair value hierarchy as Level 1, is based on statements received from our banks at December 31, 2014 and December 31, 2013. The fair value of our CRDA deposits, classified in the fair value hierarchy as Level 3, is based on estimates of the realizable value applied to the balances on statements received from the CRDA at December 31, 2014 and December 31, 2013.
	The following table summarizes the changes in fair value of the Company's Level 3 assets:
		Year Ended December 31,
	(In thousands)	2014			2013
	Balance at January 1,	$	4,613		$	28,464
	Deposits	7,239			6,651
	Included in earnings	(2,378		)	(7,825		)
	Settlements	(316		)	(22,677		)
	Ending balance at December 31,	$	9,158		$	4,613
	Balances Disclosed at Fair Value
	The following tables present the fair value measurement information about our long-term debt:
		December 31, 2014
		Outstanding Face Amount			Carrying Value			Estimated Fair Value		Fair Value Hierarchy
	(In thousands)
	Revolving Credit Facility	$	13,700		$	13,700		$	13,700	Level 2
	Incremental Term Loan	347,700			344,999			340,746		Level 2
	9.875% Senior Secured Notes due 2018	393,500			386,620			412,191		Level 1
	Total debt	$	754,900		$	745,319		$	766,637
		December 31, 2013
		Outstanding Face Amount			Carrying Value			Estimated Fair Value		Fair Value Hierarchy
	(In thousands)
	Revolving Credit Facility	$	39,900		$	39,900		$	39,900	Level 2
	Incremental Term Loan	380,000			376,234			381,900		Level 2
	9.875% Senior Secured Notes due 2018	393,500			385,126			425,472		Level 1
	Total debt	$	813,400		$	801,260		$	847,272
	The estimated fair value of our Revolving Credit Facility at December 31, 2014 and 2013 approximates its carrying value due to the short-term nature and variable repricing of the underlying Eurodollar loans comprising our Revolving Credit Facility. The estimated fair value of our incremental term loan is based on a relative value analysis performed on or about December 31, 2014 and December 31, 2013. The estimated fair value of our senior secured notes is based on quoted market prices as of December 31, 2014 and 2013.
	There were no transfers between Level 1, Level 2 and Level 3 measurements during the years ended December 31, 2014 and 2013.

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	EMPLOYEE BENEFIT PLANS
	We contribute to multi-employer pension defined benefit plans under terms of collective-bargaining agreements that cover our union-represented employees. These unions cover certain of our culinary, hotel and other trade workers. We are obligated to make defined contributions under these plans.
	The significant risks of participating in multiemployer plans include, but are not limited to, the following:
	•	We may elect to stop participating in our multi-employer plans. As a result of such election, we may be required to pay a withdrawal liability based on the underfunded status of the plan, as applicable. Our ability to fund such payments would be based on the results of our operations and subject to the risk factors that impact our business. If any of these risks actually occur, our business, financial condition and results of operations could be materially and adversely affected and it could affect our ability to meet our obligations to the multiemployer plan.
	•	We may contribute assets to the multi-employer plan for the benefit of our covered employees that are used to provide benefits to employees of other participating employers.
	•	We may be required to fund additional amounts if other participating employers stop contributing to the multiemployer plan.
	Contributions, based on wages paid to covered employees, totaled $7.9 million, $7.3 million and $6.7 million during the years ended December 31, 2014, 2013 and 2012, respectively. These aggregate contributions were not individually significant to any of the respective plans. There were no significant changes that would affect the comparability of our employer contributions during the years ended December 31, 2014, 2013 and 2012. Our estimated share of unfunded vested liabilities related to certain multi-employer pension plans is approximately $126.6 million as of January 1, 2014.
	We have a retirement savings plan under Section 401(k) of the Internal Revenue Code covering our non-union employees. The plan allows employees to defer up to the lesser of the Internal Revenue Code prescribed maximum amount or 100% of their income on a pre-tax basis through contributions to the plan. We expensed our voluntary contributions to the 401(k) plan of $1.3 million during the year ended December 31, 2014, and $1.4 million for each of the years ended December 31, 2013 and 2012.

Selected_Quarterly_Financial_I

Selected Quarterly Financial Information (Unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Information	SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
	The following table presents selected quarterly financial information:
		Year Ended December 31, 2014
	(In thousands)	First			Second			Third		Fourth			Year
	Summary Operating Results:
	Net revenues	$	167,264		$	181,854		$	209,946	$	179,147		$	738,211
	Operating income	6,322			27,596			43,437		21,251			98,606
	Net income (loss)	(10,664		)	8,762			22,977		2,634			23,709
		Year Ended December 31, 2013
	(In thousands)	First			Second			Third		Fourth			Year
	Summary Operating Results:
	Net revenues	$	165,644		$	172,877		$	200,051	$	157,128		$	695,700
	Operating income	12,204			6,944			28,712		(1,749		)	46,111
	Net income (loss)	(8,035		)	(12,957		)	5,180		(40,765		)	(56,577		)

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS
	We engage in transactions with BAC and MAC in the ordinary course of business. Related party balances are non-interest bearing and are included in accounts receivable or accrued liabilities, as applicable, on the consolidated balance sheets.
	Surface Lot Ground Lease
	We entered into a ground lease agreement with MAC for approximately 8 acres that provides the land on which our surface parking lot resides. The lease is on a month-to-month term and may be terminated by either party effective on the last day of the month that is three months after notice is given. Pursuant to the surface lot ground lease agreement, our lease payment is comprised of a de minimus monthly payment to the landlord and the property taxes, which are paid directly to the taxing authority. Property taxes incurred for the surface lot ground lease agreement were $1.0 million, $3.2 million, and $2.8 million for the years ended December 31, 2014, 2013 and 2012, respectively, which was included in selling, general and administrative on the consolidated statements of operations.
	Compensation of Certain Employees
	We reimburse BAC for out-of-pocket costs and expenses incurred related to employee travel and certain advertising expenses. In previous years, BAC was also reimbursed for compensation paid to employees performing services for us and for various payments made on our behalf, primarily related to third-party insurance premiums and certain financing fees. The related amounts due to BAC for these types of expenditures paid by BAC were $0.1 million and $0.4 million at December 31, 2014 and 2013, respectively. Reimbursable expenditures were $2.9 million, $7.7 million, and $10.9 million for the years ended December 31, 2014, 2013 and 2012, respectively. Reimbursable expenses, with the exception of deferred financing fees, are included in selling, general and administrative on the consolidated statements of operations.

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS
	We have evaluated all events or transactions that occurred after December 31, 2014. During this period, we did not identify any subsequent events, the effects of which would require adjustment to our financial position or results of operations as of and for the year ended December 31, 2014.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Basis of Presentation	The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") and include the accounts of MDDC and MDFC.
	All intercompany accounts and transactions have been eliminated.
Cash and Cash Equivalents	Cash and Cash Equivalents
	Cash and cash equivalents include highly liquid investments with maturities of three months or less at their date of purchase, and are on deposit with high credit quality financial institutions. The carrying values of these instruments approximate their fair values due to their short maturities.
Restricted Cash	Restricted Cash
	Restricted cash consists primarily of advance payments related to amounts restricted by regulation for online gaming purposes. These restricted cash balances are held by high credit quality financial institutions. The carrying value of these instruments approximates their fair value due to their short maturities.
Accounts Receivable, Net	Accounts Receivable, net
	Accounts receivable consist primarily of casino, hotel and other receivables. Accounts receivable are typically non-interest-bearing and are initially recorded at cost. Accounts are written off when management deems the account to be uncollectible. An estimated allowance for doubtful accounts is maintained to reduce our receivables to their estimated realizable amount. The allowance is estimated based on specific review of customer accounts and management's historical collection experience as well as current economic and business conditions. As a result, the net carrying value approximates fair value.
	The activity comprising our allowance for doubtful accounts is as follows:
		Year Ended December 31,
	(In thousands)	2014			2013			2012
	Beginning balance, January 1	$	20,996		$	22,356		$	23,555
	Additions	4,028			2,824			1,954
	Deductions	(3,532		)	(4,184		)	(3,153		)
	Ending balance, December 31	$	21,492		$	20,996		$	22,356
	Management does not believe that any significant concentration of credit risk existed at December 31, 2014.
Inventories	Inventories
	Inventories consist primarily of food and beverage and retail items and are stated at the lower of cost or market. Cost is determined using the average cost method.
Property and Equipment, net	Property and Equipment, net
	Property and equipment are stated at cost. Depreciation is computed using the straight-line method over the estimated useful lives of the assets or, for leasehold improvements, over the shorter of the asset's useful life or term of the lease.
	The estimated useful lives of our major components of property and equipment are:
	Building and improvements	10 to 40 years
	Furniture and equipment	3 to 7 years
	Gains or losses on disposals of assets are recognized as incurred using the specific identification method. Costs of major improvements are capitalized, while costs of normal repairs and maintenance are charged to expense as incurred.
Impairment of Long-Lived Assets	We evaluate the carrying value of long-lived assets whenever events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. For an asset that is to be disposed of, we recognize the asset at the lower of carrying value or fair market value, less costs of disposal, as estimated based on comparable asset sales, solicited offers, or a discounted cash flow model. For a long-lived asset to be held and used, we review the asset for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. We then compare the estimated undiscounted future cash flows of the asset to the carrying value of the asset. The asset is not impaired if the undiscounted future cash flows exceed its carrying value. If the carrying value exceeds the undiscounted future cash flows, then an impairment charge is recorded, typically measured using a discounted cash flow model, which is based on the estimated future results of the relevant reporting unit discounted using our weighted-average cost of capital and market indicators of terminal year free cash flow multiples. If an asset is under development, future cash flows include remaining construction costs. All resulting recognized impairment charges are recorded as operating expenses.
	No impairment charge was recorded during the year ended December 31, 2014. An impairment charge of $2.8 million was recognized in the year ended December 31, 2012, as a result of the abandonment of a project to construct a parking structure.
Capitalized Interest	Capitalized Interest
	Interest costs, primarily associated with our expansion projects, are capitalized as part of the cost of our constructed assets. Interest costs, which include commitment fees, letter of credit fees and the amortized portion of deferred financing fees, discounts and origination fees, are capitalized on amounts expended for the respective projects using our weighted-average cost of borrowing. Capitalization of interest will cease when the respective project, or discernible portions of the projects, are substantially complete. We amortize capitalized interest over the estimated useful life of the related asset. No interest was capitalized during the years ended December 31, 2014 and 2013. Capitalized interest for the year ended December 31, 2012 was $0.5 million.
Debt Financing Costs	Debt Financing Costs
	Debt financing costs, which include legal and other direct costs related to the issuance of our outstanding debt, are deferred and amortized to interest expense over the contractual term of the underlying long-term debt using the effective interest method. In the event that our debt is modified, repurchased or otherwise reduced prior to its original maturity date, we ratably reduce the unamortized debt financing costs.
CRDA Investments	CRDA Investments
	Pursuant to the New Jersey Casino Control Act ("Casino Control Act"), as a casino licensee, we are assessed an amount equal to 1.25% of our land-based gross gaming revenues in order to fund qualified investments. This assessment is made in lieu of an Investment Alternative Tax ("IAT") equal to 2.5% of land-based gross gaming revenues. The Casino Control Act also provides for an assessment of licensees equal to 2.5% of online gross gaming revenues, which is made in lieu of an IAT equal to 5.0% of online gross gaming revenues. Once our funds are deposited with the New Jersey Casino Reinvestment Development Authority ("CRDA"), qualified investments may be satisfied by: (i) the purchase of bonds issued by the CRDA at below market rates of interest; (ii) direct investment in CRDA-approved projects; or (iii) a donation of funds to projects as determined by the CRDA. According to the Casino Control Act, funds on deposit with the CRDA are invested by the CRDA and the resulting income is shared two-thirds to the casino licensee and one-third to the CRDA. Further, the Casino Control Act requires that CRDA bonds be issued at statutory rates established at two-thirds of market value.
	We are required to make quarterly deposits with the CRDA to satisfy our investment obligations. At the date the obligation arises, we record charges to expense (i) pursuant to the respective underlying agreements for obligations with identified qualified investments and (ii) by applying a one-third valuation reserve to our obligations that are available to fund qualified investments to reflect the anticipated below market return on investment. The one-third valuation reserve is adjusted accordingly, if necessary when a qualified investment is identified. Our deposits with the CRDA, net of valuation reserves held by us, were $9.2 million and $4.6 million as of December 31, 2014 and 2013, respectively, and are included in other assets, net, on our consolidated balance sheets. An impairment charge of $5.0 million was recognized in the year ended December 31, 2013, related to our CRDA investments.
Loyalty Programs	Loyalty Programs
	We have established promotional programs to encourage repeat business from frequent and active customers. Members earn points based on gaming activity, and such points can be redeemed for a specified period of time, principally for restricted free play slot machine credits and complimentary goods and services. We accrue for earned points expected to be redeemed as a promotional allowance. The accruals are based on estimates and assumptions regarding the mix of restricted free play and complimentary goods and services expected to be redeemed and the costs of providing those benefits. Historical data is used to assist in the determination of the estimated accruals. The points accruals for our loyalty programs are included in accrued liabilities on our consolidated balance sheets.
Long-Term Debt, Net of Current Maturities	Long-Term Debt, Net of Current Maturities
	Long-term debt, net of current maturities is reported at amortized cost. The discount granted to the initial purchasers upon issuance is recorded as an adjustment to the face amount of the debt. The discount is accreted to interest expense using the effective interest method over the term of the underlying debt.
Self-Insurance Reserves	Self-Insurance Reserves
	We are self-insured for general liability costs up to certain amounts and are self-insured up to certain stop loss amounts for employee health coverage. We are currently self-insured with respect to each catastrophe related property damage claim, non-catastrophe related property damage claim, general liability claim, and non-union employee medical case, respectively. Insurance claims and reserves include accruals of estimated settlements for known claims, as well as accruals of estimates for claims incurred but not yet reported. In estimating these accruals, we consider historical loss experience and make judgments about the expected levels of costs per claim. Management believes the estimates of future liability are reasonable based upon our methodology; however, changes in health care costs, accident frequency and severity and other factors could materially affect the estimate for these liabilities. Certain of these claims represent obligations to make future payments; and therefore we discount such reserves to an amount representing the present value of the claims which will be paid in the future using a blended rate, which represents the inherent risk and the average payout duration. Self-insurance reserves are included in accrued liabilities on our consolidated balance sheets.
Revenue Recognition	Revenue Recognition
	Gaming revenue represents the net win from gaming activities, which is the aggregate difference between gaming wins and losses. The majority of our gaming revenue is counted in the form of cash and chips and therefore is not subject to any significant or complex estimation procedures. Cash discounts and other incentives to customers related to gaming play are recorded as a reduction of gross gaming revenues as promotional allowances.
	Room revenue recognition criteria are met at the time of occupancy.
	Food and beverage revenue recognition criteria are met at the time of service.
Promotional Allowances	Promotional Allowances
	The retail value of accommodations, food and beverage, and other services furnished to guests on a complimentary basis is included in gross revenues and then deducted as promotional allowances. Promotional allowances also include incentives such as cash, goods and services (such as complimentary rooms and food and beverages) earned pursuant to our loyalty programs. We reward customers, through the use of loyalty programs, with points based on amounts wagered that can be redeemed for a specified period of time, principally for restricted free play slot machine credits and complimentary goods and services. We record the estimated retail value of these goods and services as revenue and then record a corresponding deduction as promotional allowances.
	The amounts included in promotional allowances are as follows:
		Year Ended December 31,
	(In thousands)	2014			2013			2012
	Rooms	$	71,551		$	71,632		$	71,979
	Food and beverage	51,552			51,542			52,859
	Other	109,134			94,642			92,479
	Total promotional allowances	$	232,237		$	217,816		$	217,317
	The estimated costs of providing such promotional allowances are as follows:
		Year Ended December 31,
	(In thousands)	2014			2013			2012
	Rooms	$	21,729		$	21,440		$	23,066
	Food and beverage	40,894			39,774			42,067
	Other	11,579			10,972			11,584
	Total cost of promotional allowances	$	74,202		$	72,186		$	76,717
Gaming Taxes	Gaming Taxes
	We are subject to an annual tax assessment based on gross gaming revenues of 8% on our land-based gross gaming revenues and 15% on our online gross gaming revenues. These gaming taxes are recorded as a gaming expense in the consolidated statements of operations. These taxes were $51.9 million, $45.4 million and $44.3 million during the years ended December 31, 2014, 2013 and 2012, respectively.
Income Taxes	Income Taxes
	As a single member limited liability company, MDDC is treated as a disregarded entity for federal income tax purposes. As such, it is not subject to federal income tax and its income is treated as earned by its member, MDDHC. MDDHC is treated as a partnership for federal income tax purposes and federal income taxes are the responsibility of its members. In New Jersey, casino partnerships are subject to state income taxes under the Casino Control Act; therefore, MDDC, considered a casino partnership, is required to record New Jersey state income taxes. In 2004, MDDC was granted permission by the state of New Jersey, pursuant to a ruling request, to file a consolidated New Jersey corporation business tax return with the members of its parent, MDDHC. The amounts reflected in the condensed consolidated financial statements are reported as if MDDC was taxed for state purposes on a stand-alone basis; however, MDDC files a consolidated state tax return with the members of MDDHC. Under the terms of the tax sharing agreement between MDDC and the members of its parent, current year tax attributes of the members are utilized prior to MDDC’s separately determined net operating loss carryforward.  The utilization of the current year member tax attributes in 2014 resulted in an income tax payable of $4.1 million that will be remitted to the members of MDDHC under the tax sharing agreement.
	The amounts due to these members are a result of each member's respective tax attributes included in the consolidated state tax return. A reconciliation of the components of our stand-alone state income taxes payable (receivable) is presented below:
		December 31,
	(In thousands)	2014			2013
	Amounts payable to members of MDDHC	$	4,148		$	—
	Amounts receivable - State	(5		)	(1,037		)
	Income taxes payable (receivable), net	$	4,143		$	(1,037	)
Advertising Expense	Advertising Expense
	Direct advertising costs are expensed the first time such advertising appears. Advertising costs are included in selling, general and administrative expenses on the consolidated statements of operations and totaled $22.9 million, $14.1 million and $15.1 million for the years ended December 31, 2014, 2013 and 2012, respectively.
Preopening Expenses	Preopening Expenses
	Certain costs of start-up activities were expensed as incurred. During the years ended December 31, 2014, 2013 and 2012, we expensed $0.3 million, $4.1 million and $0.2 million, respectively. The preopening expenses incurred during 2014 were related primarily to our internet gaming initiative.
Other Operating Items, net	Other Operating Items, net
	Other operating items, net, generally includes unusual, nonrecurring charges and credits. The net credit of $1.7 million for the year ended December 31, 2014, includes recoveries resulting from the receipt of insurance proceeds related to the fire that occurred during the construction of The Water Club in 2007 of $2.2 million. Other operating items, net, for the year ended December 31, 2013, totaled $3.3 million, including $2.1 million for self-insurance reserve adjustments related to prior periods. Other operating items, net, for the year ended December 31, 2012, reflected a net credit of $7.7 million, which was comprised of a gain of $3.8 million related to the subrogated insurance settlement related to the fire that occurred during the construction of The Water Club in 2007, and a gain of $3.8 million from business interruption proceeds due to the mandated closure of the property in August 2011 related to Hurricane Irene.
Concentrations of Credit Risk	Concentrations of Credit Risk
	Financial instruments that subject the Company to credit risk consist of cash equivalents, accounts receivable and CRDA deposits. The Company's policy is to limit the amount of credit exposure to any one financial institution, and place investments with financial institutions evaluated as being creditworthy, or in short-term money market funds which are exposed to minimal interest rate and credit risk. The Company has bank deposits which may at times exceed federally-insured limits.
	Concentrations of credit risk, with respect to gaming receivables, are limited through the Company's credit evaluation process. The Company issues markers to approved gaming customers only following credit checks and investigations of creditworthiness.
Certain Risks and Uncertainties	Certain Risks and Uncertainties
	The Company's operations are dependent on its continued licensing by the state gaming commission. The loss of our license could have a material adverse effect on future results of operations. The Company is dependent on geographically local markets for a significant number of its customers and revenues. If economic conditions in these areas deteriorate or additional gaming licenses are awarded in these markets, the Company's results of operations could be adversely affected. The Company is dependent on the economy of the United States, in general, and any deterioration in the national economic, energy, credit and capital markets could have a material adverse effect on future results of operations.
Use of Estimates	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.
Reclassification	Reclassification
	Certain prior period amounts presented on our consolidated balance sheets have been reclassified to conform to the current year presentation. The reclassification is related to long-term tax liabilities totaling $3.2 million reclassified from other long-term tax liabilities to other liabilities in our consolidated balance sheet for the year ended December 31, 2013. This reclassification had no effect on our total liabilities and member equity as previously reported.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements
	Accounting Standards Update 2014-17 ASC 805 Business Combinations ("Update 2014-17")
	In November 2014, the FASB issued Update 2014-17, which provides guidance on whether and at what threshold an acquired entity that is a business or nonprofit activity can apply pushdown accounting in its separate financial statements. The pronouncement was effective on November 18, 2014. The impact of the adoption of Update 2014-17 did not have an effect on our consolidated financial statements.
	Accounting Standards Update 2014-15 Disclosure of Uncertainties About an Entity's Ability to Continue as a Going Concern ("Update 2014-15")
	In August 2014, the FASB issued Update 2014-15, which provides guidance on determining when and how reporting entities must disclose going-concern uncertainties in their financial statements. The pronouncement is effective for annual periods ending after December 15, 2016, and interim periods thereafter, and early adoption is permitted. The impact of the adoption of Update 2014-15 is currently under evaluation.
	Accounting Standards Update 2014-09 Revenue from Contracts with Customers (Topic 606) ("Update 2014-09")
	In May 2014, the FASB issued Update 2014-09. Update 2014-09 outlines a new, single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The pronouncement is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, and early adoption is not permitted. The impact of the adoption of Update 2014-09 to the Company's consolidated financial position or results of operations is currently under evaluation.
	A variety of proposed or otherwise potential accounting standards are currently being studied by standard-setting organizations and certain regulatory agencies. Because of the tentative and preliminary nature of such proposed standards, we have not yet determined the effect, if any, that the implementation of such proposed standards would have on our consolidated financial statements.

Other_Operating_Items_Net_Othe

Other Operating Items, Net Other Operating Items, Net (Policies) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of Other Operating Items [Line Items]
Other operating items, net	($1,746)	$3,318	($7,700)

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Allowance of Doubtful Accounts	The activity comprising our allowance for doubtful accounts is as follows:
		Year Ended December 31,
	(In thousands)	2014			2013			2012
	Beginning balance, January 1	$	20,996		$	22,356		$	23,555
	Additions	4,028			2,824			1,954
	Deductions	(3,532		)	(4,184		)	(3,153		)
	Ending balance, December 31	$	21,492		$	20,996		$	22,356
Property and Equipment	The estimated useful lives of our major components of property and equipment are:
	Building and improvements	10 to 40 years
	Furniture and equipment	3 to 7 years
Changes in Self-Insurance Reserves	Self-insurance reserves are included in accrued liabilities on our consolidated balance sheets.
		Year Ended December 31,
	(In thousands)	2014			2013			2012
	Beginning balance, January 1	$	11,566		$	9,083		$	8,095
	Charged to costs and expenses	20,045			19,780			18,455
	Payments made	(18,026		)	(17,297		)	(17,467		)
	Ending balance, December 31	$	13,585		$	11,566		$	9,083
Promotional Allowances	The amounts included in promotional allowances are as follows:
		Year Ended December 31,
	(In thousands)	2014			2013			2012
	Rooms	$	71,551		$	71,632		$	71,979
	Food and beverage	51,552			51,542			52,859
	Other	109,134			94,642			92,479
	Total promotional allowances	$	232,237		$	217,816		$	217,317
	The estimated costs of providing such promotional allowances are as follows:
		Year Ended December 31,
	(In thousands)	2014			2013			2012
	Rooms	$	21,729		$	21,440		$	23,066
	Food and beverage	40,894			39,774			42,067
	Other	11,579			10,972			11,584
	Total cost of promotional allowances	$	74,202		$	72,186		$	76,717
Reconciliation of State Income Taxes Payable	The amounts due to these members are a result of each member's respective tax attributes included in the consolidated state tax return. A reconciliation of the components of our stand-alone state income taxes payable (receivable) is presented below:
		December 31,
	(In thousands)	2014			2013
	Amounts payable to members of MDDHC	$	4,148		$	—
	Amounts receivable - State	(5		)	(1,037		)
	Income taxes payable (receivable), net	$	4,143		$	(1,037	)

Property_and_Equipment_Net_Tab

Property and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Property and Equipment, Net	Property and equipment, net, consists of the following:
		December 31,
	(In thousands)	2014		2013
	Land	$	87,301	$	87,301
	Buildings and improvements	1,420,467		1,416,432
	Furniture and equipment	321,459		314,610
	Construction in progress	9,569		5,533
	Total property and equipment	1,838,796		1,823,876
	Less accumulated depreciation	665,574		610,942
	Property and equipment, net	$	1,173,222	$	1,212,934

Accrued_Liabilities_Tables

Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2014
Accrued Liabilities [Abstract]
Accrued Liabilities	Accrued liabilities consist of the following:
		December 31,
	(In thousands)	2014		2013
	Payroll and related	$	22,546	$	20,736
	Interest	15,205		15,840
	Gaming liabilities	25,463		20,714
	Player loyalty program liabilities	4,963		4,320
	General liability claims	11,212		9,601
	Other accruals	25,571		26,884
	Total accrued liabilities	$	104,960	$	98,095

Longterm_Debt_Net_Tables

Long-term Debt, Net (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Long-term Debt, Net	Long-term debt, net of current maturities, consists of the following:
				December 31, 2014
	(In thousands)	Interest Rates at Dec. 31, 2014		Outstanding Principal			Unamortized Discount			Unamortized Origination Fees			Long-Term Debt, Net
	Revolving Credit Facility	4.1	%	$	13,700		$	—		$	—		$	13,700
	Incremental Term Loan	6.75	%	347,700			(2,701		)	—			344,999
	9.875% Senior Secured Notes due 2018	9.88	%	393,500			(1,488		)	(5,392		)	386,620
				754,900			(4,189		)	(5,392		)	745,319
	Less current maturities			3,800			—			—			3,800
	Long-term debt, net			$	751,100		$	(4,189	)	$	(5,392	)	$	741,519
				31-Dec-13
	(In thousands)	Interest Rates at Dec. 31, 2013		Outstanding Principal			Unamortized Discount			Unamortized Origination Fees			Long-Term Debt, Net
	Revolving Credit Facility	3.86	%	$	39,900		$	—		$	—		$	39,900
	Incremental Term Loan	6.75	%	380,000			(3,766		)	—			376,234
	9.875% Senior Secured Notes due 2018	9.88	%	393,500			(1,811		)	(6,563		)	385,126
				813,400			(5,577		)	(6,563		)	801,260
	Less current maturities			3,800			—			—			3,800
	Long-term debt, net			$	809,600		$	(5,577	)	$	(6,563	)	$	797,460
Schedule of Line of Credit Facilities	The outstanding principal amounts under the Revolving Credit Facility are comprised of the following:
		December 31,
	(In thousands)	2014			2013
	Revolving Credit Facility	$	5,000		$	35,000
	Swing Loan	8,700			4,900
	Total outstanding principal amounts under the Revolving Credit Facility	$	13,700		$	39,900
Scheduled Maturities of Face Amounts of Long-term Debt
	For the Year Ending December 31,	(In thousands)
	2015	$	3,800
	2016	3,800
	2017	3,800
	2018	743,500
	2019	—
	Thereafter	—
	Total outstanding principal of long-term debt	$	754,900

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Summary of Provision for State Income Taxes	A summary of the provision for (benefit from) state income taxes is as follows:
		December 31,
	(In thousands)	2014				2013				2012
	State
	Current	$	4,152			$	2			$	57
	Deferred	(753		)		(4,505		)		(1,310		)
	Provision for (benefit from) state income taxes	$	3,399			$	(4,503	)		$	(1,253	)
Reconciliation Between the State Statutory Rate and the Effective Income Tax Rate	The following table provides a reconciliation between the state statutory rate and the effective income tax rate where both are expressed as a percentage of income:
		December 31,
		2014			2013			2012
	Tax provision at state statutory rate	9	%		9	%		9	%
	Accrued interest on uncertain tax benefits	3.2			(1.5	)		(2.1	)
	New jobs investment tax credit	—			—			(1.9	)
	Other, net	0.3			(0.1	)		(0.3	)
	Total state income tax provision	12.5	%		7.4	%		4.7	%
Schedule of Deferred Tax Assets and Liabilities	The components comprising the Company's net deferred state tax liability are as follows:
		December 31,
	(In thousands)	2014				2013
	Deferred state tax assets
	Net operating loss carryforward	$	3,037			$	9,257
	Provision for doubtful accounts	1,490				1,466
	Reserve for employee benefits	1,454				1,150
	Accrued expenses	1,031				921
	Interest accrued on uncertain tax benefits	580				492
	Other	704				765
	Gross deferred state tax assets	8,296				14,051
	Deferred state tax liabilities
	Difference between book and tax basis of property	10,215				17,728
	Prepaid services and supplies	825				657
	Other	193				227
	Gross deferred state tax liabilities	11,233				18,612
	Net deferred state tax liabilities	$	2,937			$	4,561
	At December 31, 2014, we have a state income tax net operating loss of approximately $33.7 million which may be carried forward or used until expiration beginning in 2032.
	The items comprising our deferred state income taxes as presented on our consolidated balance sheets are as follows:
		Year Ended December 31,
	(In thousands)	2014				2013
	Non-current deferred income tax liability	$	6,315			$	7,049
	Current deferred income tax asset	(3,378		)		(2,488		)
	Net deferred state tax liability	$	2,937			$	4,561
Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
		Year Ended December 31,
	(In thousands)	2014				2013				2012
	Unrecognized tax benefit, January 1	$	6,221			$	6,225			$	9,068
	Additions based on tax positions related to current year	1				1				10
	Additions based on tax positions related to prior years	—				—				—
	Reductions based on tax positions settled with taxing authorities	—				—				(1,078		)
	Reductions based on tax positions related to prior years	(5		)		(5		)		(1,775		)
	Unrecognized tax benefit, December 31	$	6,217			$	6,221			$	6,225

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments under Noncancelable Operating Leases	Future minimum lease payments required under noncancelable operating leases (principally for land, see above and Note 10, Related Party Transactions) as of December 31, 2014 are as follows:
	For the Year Ending December 31,	(In thousands)
	2015	$	8,258
	2016	7,288
	2017	6,705
	2018	6,573
	2019	6,280
	Thereafter	320,289
	Total	$	355,393
Schedule of Future Minimum Rental Income	Future minimum rental income, which is primarily related to retail and restaurant facilities located within our property, as of December 31, 2014 is as follows:
	For the Year Ending December 31,	(In thousands)
	2015	$	1,753
	2016	1,525
	2017	1,444
	2018	1,444
	2019	1,444
	Thereafter	5,232
	Total	$	12,842

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis	The following tables show the fair values of certain of our financial instruments:
		December 31, 2014
	(In thousands)	Balance			Level 1			Level 2		Level 3
	Assets
	Cash and cash equivalents	$	36,054		$	36,054		$	—	$	—
	Restricted cash	5,676			5,676			—		—
	CRDA investments, net	9,158			—			—		9,158
		December 31, 2013
	(In thousands)	Balance			Level 1			Level 2		Level 3
	Assets
	Cash and cash equivalents	$	37,527		$	37,527		$	—	$	—
	CRDA investments, net	4,613			—			—		4,613
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]	The following table summarizes the changes in fair value of the Company's Level 3 assets:
		Year Ended December 31,
	(In thousands)	2014			2013
	Balance at January 1,	$	4,613		$	28,464
	Deposits	7,239			6,651
	Included in earnings	(2,378		)	(7,825		)
	Settlements	(316		)	(22,677		)
	Ending balance at December 31,	$	9,158		$	4,613
Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis	The following tables present the fair value measurement information about our long-term debt:
		December 31, 2014
		Outstanding Face Amount			Carrying Value			Estimated Fair Value		Fair Value Hierarchy
	(In thousands)
	Revolving Credit Facility	$	13,700		$	13,700		$	13,700	Level 2
	Incremental Term Loan	347,700			344,999			340,746		Level 2
	9.875% Senior Secured Notes due 2018	393,500			386,620			412,191		Level 1
	Total debt	$	754,900		$	745,319		$	766,637
		December 31, 2013
		Outstanding Face Amount			Carrying Value			Estimated Fair Value		Fair Value Hierarchy
	(In thousands)
	Revolving Credit Facility	$	39,900		$	39,900		$	39,900	Level 2
	Incremental Term Loan	380,000			376,234			381,900		Level 2
	9.875% Senior Secured Notes due 2018	393,500			385,126			425,472		Level 1
	Total debt	$	813,400		$	801,260		$	847,272

Selected_Quarterly_Financial_I1

Selected Quarterly Financial Information (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	The following table presents selected quarterly financial information:
		Year Ended December 31, 2014
	(In thousands)	First			Second			Third		Fourth			Year
	Summary Operating Results:
	Net revenues	$	167,264		$	181,854		$	209,946	$	179,147		$	738,211
	Operating income	6,322			27,596			43,437		21,251			98,606
	Net income (loss)	(10,664		)	8,762			22,977		2,634			23,709
		Year Ended December 31, 2013
	(In thousands)	First			Second			Third		Fourth			Year
	Summary Operating Results:
	Net revenues	$	165,644		$	172,877		$	200,051	$	157,128		$	695,700
	Operating income	12,204			6,944			28,712		(1,749		)	46,111
	Net income (loss)	(8,035		)	(12,957		)	5,180		(40,765		)	(56,577		)

Summary_of_Significant_Account3

Summary of Significant Accounting Policies (Organization) (Details)	12 Months Ended
	Dec. 31, 2014	Mar. 23, 2010
	entity
Organization Attributes [Line Items]
Number of gaming rntertainment properties	21
Borgata [Member]
Organization Attributes [Line Items]
Land owned	45.6
MDFC
Organization Attributes [Line Items]
Subsidiaries, ownership percentage	100.00%
BAC
Organization Attributes [Line Items]
Ownership interest in joint venture	50.00%
MAC
Organization Attributes [Line Items]
Ownership interest in joint venture		50.00%

Summary_of_Significant_Account4

Summary of Significant Accounting Policies (Joint Venture Interest) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
Impairments of assets	$0	$5,032	$2,811

Summary_of_Significant_Account5

Summary of Significant Accounting Policies Cash and Cash Equivalents (Details)	12 Months Ended
	Dec. 31, 2014
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents, Maturity of Qualifying Investments, Maximum	3 months

Summary_of_Significant_Account6

Summary of Significant Accounting Policies (Accounts Receivable, Net) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning balance, January 1	$20,996	$22,356	$23,555
Provision for doubtful accounts	4,028	2,824	1,954
Deductions	-3,532	-4,184	-3,153
Ending balance, December 31	$21,492	$20,996	$22,356

Summary_of_Significant_Account7

Summary of Significant Accounting Policies (Property, Plant and Equipment Useful Lives) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Impairments of assets	$0	$5,032	$2,811
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	40 years
Furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years

Summary_of_Significant_Account8

Summary of Significant Accounting Policies (Interest Costs Capitalized) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Interest costs capitalized	$0	$0	$500

Summary_of_Significant_Account9

Summary of Significant Accounting Policies (Gaming Investments) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Regulatory Gaming Assets [Line Items]
Preopening expenses	$269,000	$4,056,000	$240,000
Gaming Taxes	51,900,000	45,400,000	44,300,000
Impairments of assets	0	5,032,000	2,811,000
Other Assets, Net | CRDA
Regulatory Gaming Assets [Line Items]
Borgata net deposits with CRDA	$9,200,000	$4,600,000
Land-based gaming [Member] | State of New Jersey [Member]
Regulatory Gaming Assets [Line Items]
State Gaming Licenses, Annual Fee, Percentage of Licensee Gross Gaming Revenues	1.25%
State Alternative Investment Tax, Percentage of Gross Gaming Revenues	2.50%
On-line Gaming [Member] | State of New Jersey [Member]
Regulatory Gaming Assets [Line Items]
State Gaming Licenses, Annual Fee, Percentage of Licensee Gross Gaming Revenues	2.50%
State Alternative Investment Tax, Percentage of Gross Gaming Revenues	5.00%

Recovered_Sheet1

Summary of Significant Accounting Policies Self-Insurance Reserves (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Self Insurance Reserve [Abstract]
Self Insurance Reserve	$13,585	$11,566	$9,083	$8,095
Charged to costs and expenses	20,045	19,780	18,455
Self Insurance Reserve, Decreases from Payments Made	$18,026	$17,297	$17,467

Recovered_Sheet2

Summary of Significant Accounting Policies (Promotional Allowances) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Promotional Allowances [Line Items]
Promotional allowances	$232,237	$217,816	$217,317
Cost of promotional allowances	74,202	72,186	76,717
Rooms
Promotional Allowances [Line Items]
Promotional allowances	71,551	71,632	71,979
Cost of promotional allowances	21,729	21,440	23,066
Food and beverage
Promotional Allowances [Line Items]
Promotional allowances	51,552	51,542	52,859
Cost of promotional allowances	40,894	39,774	42,067
Other
Promotional Allowances [Line Items]
Promotional allowances	109,134	94,642	92,479
Cost of promotional allowances	$11,579	$10,972	$11,584

Recovered_Sheet3

Summary of Significant Accounting Policies (Gaming Taxes) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Gaming Taxes [Line Items]
State Income Taxes Payable to Members of Partnership	$4,148,000	$0
Preopening expenses	269,000	4,056,000	240,000
Other operating items, net	-1,746,000	3,318,000	-7,700,000
Gaming Taxes	$51,900,000	$45,400,000	$44,300,000
State of New Jersey [Member] | Land-based gaming [Member]
Schedule of Gaming Taxes [Line Items]
Annual Tax Assessment - Gross Gaming Revenues	8.00%
State of New Jersey [Member] | On-line Gaming [Member]
Schedule of Gaming Taxes [Line Items]
Annual Tax Assessment - Gross Gaming Revenues	15.00%

Recovered_Sheet4

Summary of Significant Accounting Policies (Income Taxes) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014
Accounting Policies [Abstract]
Self Insurance Reserve, Decreases from Payments Made	$18,026	$17,297	$17,467
Amounts payable to members of MDDHC	4,148	0
Amounts receivable from State	0	-1,037
Income taxes payable (receivable), net	4,143	0		4,143
Income Taxes Receivable	($5)	($1,037)

Recovered_Sheet5

Summary of Significant Accounting Policies (Other) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Operating Costs and Expenses [Line Items]
Gaming Taxes	$51,900,000	$45,400,000	$44,300,000
Advertising expense	22,900,000	14,100,000	15,100,000
Other operating items, net	-1,746,000	3,318,000	-7,700,000
Self Insurance Reserve [Roll Forward]
Beginning balance, January 1	11,566,000	9,083,000	8,095,000
Charged to costs and expenses	20,045,000	19,780,000	18,455,000
Payments made	-18,026,000	-17,297,000	-17,467,000
Ending balance, December 31	13,585,000	11,566,000	9,083,000
Preopening expenses	269,000	4,056,000	240,000
Insurance-related Assessments [Member]
Other Operating Costs and Expenses [Line Items]
Other operating items, net		2,100,000
Fire, Water Club at Borgata [Member] | Gain from Insurance Recoveries
Other Operating Costs and Expenses [Line Items]
Other operating items, net	2,200,000	3,800,000
Hurricane, Irene [Member] | Gain from Insurance Recoveries
Other Operating Costs and Expenses [Line Items]
Other operating items, net		$3,800,000

Property_and_Equipment_Net_Det

Property and Equipment, Net (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Total property and equipment	$1,838,796,000	$1,823,876,000
Less accumulated depreciation	665,574,000	610,942,000
Property and equipment, net	1,173,222,000	1,212,934,000
Depreciation	58,500,000	60,000,000	63,400,000
Land
Property, Plant and Equipment [Line Items]
Total property and equipment	87,301,000	87,301,000
Buildings and improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	1,420,467,000	1,416,432,000
Furniture and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	321,459,000	314,610,000
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$9,569,000	$5,533,000

Accrued_Liabilities_Payables_a

Accrued Liabilities Payables and Accruals (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Payables and Accruals [Abstract]
Interest	$22,546	$20,736
Player loyalty program liabilities	25,463	20,714
Customer Loyalty Program Liability, Current	4,963	4,320
Liability for Claims and Claims Adjustment Expense	11,212	9,601
Other Accrued Liabilities, Current	25,571	26,884
Other accruals	15,205	15,840
Total accrued liabilities	$104,960	$98,095

Longterm_Debt_Net_Schedule_of_

Long-term Debt, Net (Schedule of Long-Term Debt) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Aug. 31, 2010
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Outstanding Principal	$754,900	$813,400
Unamortized Discount	-4,189	-5,577
Unamortized Origination Fees	-5,392	-6,563
Long-term debt, net of current maturities	741,519	797,460
Long-Term Debt, Net	745,319	801,260
Current maturities of long-term debt	3,800	3,800
Long-term Debt, Gross, Excluding Current Maturities	751,100	809,600
Secured Debt [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	6.75%	6.75%
Line of Credit [Member] | Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End	4.10%	3.86%
Term Loan [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Unamortized Discount	-2,701	-3,766
Unamortized Origination Fees	0	0
Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Unamortized Discount	0	0
Unamortized Origination Fees	0	0
Long-Term Debt, Net	13,700	39,900
Senior Secured Notes | 9.875% Senior Secured Notes due 2018
Debt Instrument [Line Items]
Unamortized Discount	-1,488	-1,811	-2,700
Unamortized Origination Fees	-5,392	-6,563
Long-Term Debt, Net	386,620	385,126
Debt Instrument, Interest Rate, Stated Percentage	9.88%	9.88%
Level 1 | Secured Debt [Member] | Incremental Term Loan
Debt Instrument [Line Items]
Outstanding Principal		380,000
Level 1 | Secured Debt [Member] | 9.875% Senior Secured Notes due 2018
Debt Instrument [Line Items]
Outstanding Principal	393,500	393,500
Level 1 | Term Loan [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Outstanding Principal	347,700
Level 1 | Carrying Value | Fair Value, Measurements, Nonrecurring [Member] | Secured Debt [Member] | Incremental Term Loan
Debt Instrument [Line Items]
Long-Term Debt, Net	$344,999	$376,234

Longterm_Debt_Net_Bank_Credit_

Long-term Debt, Net (Bank Credit Facility Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 16, 2013
Debt Instrument [Line Items]
Payments of Debt Issuance Costs	$255,000	$10,115,000	$443,000
Gains (Losses) on Extinguishment of Debt	-740,000	-25,856,000	0
Line of Credit [Member]
Debt Instrument [Line Items]
Contractual availability remaining under credit facility	51,500,000
Payments of Debt Issuance Costs		10,100,000	400,000
Acceleration of amortization of deferred loan fees			100,000
Line of Credit [Member] | Bank Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End	4.10%	3.86%
Subsidiary, Borgata [Member] | Bank Credit Facility
Debt Instrument [Line Items]
Gains (Losses) on Extinguishment of Debt		-500,000
Subsidiary, Borgata [Member] | 9.875% Senior Secured Notes due 2018 | Senior Secured Notes
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	9.88%
Subsidiary, Borgata [Member] | Bank Credit Facility Amendment | Line of Credit [Member]
Debt Instrument [Line Items]
Consolidated EBITDA required	110,000,000
Outstanding balance	13,700,000	39,900,000
Debt Instrument Increase, Additional Borrowing	15,000,000
Subsidiary, Borgata [Member] | Bank Credit Facility Amendment | Line of Credit [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity	60,000,000
Outstanding balance	5,000,000	35,000,000
Subsidiary, Borgata [Member] | Bank Credit Facility Amendment | Line of Credit [Member] | Incremental Term Loan [Member]
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity				380,000,000
Gains (Losses) on Extinguishment of Debt	-700,000	-25,300,000
Subsidiary, Borgata [Member] | Bank Credit Facility Amendment | Line of Credit [Member] | Swing Loan [Member]
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity	15,000,000
Outstanding balance	8,700,000	4,900,000
Subsidiary, Borgata [Member] | Bank Credit Facility Amendment | Letter of Credit [Member]
Debt Instrument [Line Items]
Outstanding balance	$4,800,000
Subsidiary, Borgata [Member] | Bank Credit Facility Amendment | Minimum | Line of Credit [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Commitment fee on unused capacity, percentage	0.50%
Subsidiary, Borgata [Member] | Bank Credit Facility Amendment | Maximum | Line of Credit [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Commitment fee on unused capacity, percentage	0.75%
Federal Funds Rate [Member] | Subsidiary, Borgata [Member] | Bank Credit Facility Amendment | Line of Credit [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
One-month Eurodollar [Member] | Subsidiary, Borgata [Member] | Bank Credit Facility Amendment | Line of Credit [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%

Longterm_Debt_Net_Senior_Secur

Long-term Debt, Net (Senior Secured Notes Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 31, 2010
Debt Instrument [Line Items]
Discount at issuance	$4,189,000	$5,577,000
Gains (Losses) on Extinguishment of Debt	-740,000	-25,856,000	0
Line of Credit [Member]
Debt Instrument [Line Items]
Contractual availability remaining under credit facility	51,500,000
Senior Secured Notes
Debt Instrument [Line Items]
Minimum required coverage ratio	2
Senior Secured Notes | 9.875% Senior Secured Notes due 2018
Debt Instrument [Line Items]
Face amount				400,000,000
Debt Instrument, Interest Rate, Stated Percentage	9.88%	9.88%
Issue price, percentage				99.32%
Discount at issuance	1,488,000	1,811,000		2,700,000
Minimum | Senior Secured Notes
Debt Instrument [Line Items]
Actual coverage ratio (less than 2.0)				2
Subsidiary, Borgata [Member] | Bank Credit Facility
Debt Instrument [Line Items]
Gains (Losses) on Extinguishment of Debt		-500,000
Subsidiary, Borgata [Member] | 9.875% Senior Secured Notes due 2018 | Senior Secured Notes
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	9.88%
Subsidiary, Borgata [Member] | Senior Secured Notes | 9.875% Senior Secured Notes due 2018
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	10.40%
Subsidiary, Borgata [Member] | On or After August 15, 2014 and Prior to August 15, 2015 | Senior Secured Notes | 9.875% Senior Secured Notes due 2018
Debt Instrument [Line Items]
Redemption price, percentage		104.94%
Subsidiary, Borgata [Member] | On or After August 15, 2015 and Prior to August 15, 2016 | Senior Secured Notes | 9.875% Senior Secured Notes due 2018
Debt Instrument [Line Items]
Redemption price, percentage		102.47%
Subsidiary, Borgata [Member] | On or After August 15, 2016 | Senior Secured Notes | 9.875% Senior Secured Notes due 2018
Debt Instrument [Line Items]
Redemption price, percentage		100.00%
Subsidiary, Borgata [Member] | Bank Credit Facility Amendment | Line of Credit [Member]
Debt Instrument [Line Items]
Outstanding balance	$13,700,000	$39,900,000

Longterm_Debt_Net_Maturities_o

Long-term Debt, Net (Maturities of Long-Term Debt) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]
2013	$3,800
2014	3,800
2015	3,800
2016	743,500
2017	0
Thereafter	0
Total outstanding principal of long-term debt	$754,900	$813,400

Longterm_Debt_Net_Term_Loan_De

Long-term Debt, Net Term Loan (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 16, 2013
Debt Instrument [Line Items]
Payments of Debt Issuance Costs	$255,000	$10,115,000	$443,000
Debt Instrument, Optional Annual Principal Payment	32,300,000
Gains (Losses) on Extinguishment of Debt	-740,000	-25,856,000	0
Line of Credit [Member]
Debt Instrument [Line Items]
Payments of Debt Issuance Costs		10,100,000	400,000
Bank Credit Facility Amendment | Subsidiary, Borgata [Member] | Line of Credit [Member] | Incremental Term Loan [Member]
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity				380,000,000
Debt Instrument, Interest Rate, Effective Percentage	6.90%
Debt Instrument, Issue Discount, Percentage	1.00%
Debt Instrument, Fixed Quarterly Amortization of Principal, Percentage	0.25%
Gains (Losses) on Extinguishment of Debt	($700,000)	($25,300,000)
Bank Credit Facility Amendment | Subsidiary, Borgata [Member] | Line of Credit [Member] | Incremental Term Loan [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Bank Credit Facility Amendment | Subsidiary, Borgata [Member] | Line of Credit [Member] | Incremental Term Loan [Member] | Eurodollar Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Maximum | Bank Credit Facility Amendment | Subsidiary, Borgata [Member] | Line of Credit [Member] | Incremental Term Loan [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.75%
Maximum | Bank Credit Facility Amendment | Subsidiary, Borgata [Member] | Line of Credit [Member] | Incremental Term Loan [Member] | Eurodollar Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	5.75%
Minimum | Bank Credit Facility Amendment | Subsidiary, Borgata [Member] | Line of Credit [Member] | Incremental Term Loan [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.50%
Minimum | Bank Credit Facility Amendment | Subsidiary, Borgata [Member] | Line of Credit [Member] | Incremental Term Loan [Member] | Eurodollar Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	5.50%
On or After the First Anniversary of Debt Issuance [Member] | Bank Credit Facility Amendment | Subsidiary, Borgata [Member] | Line of Credit [Member] | Incremental Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Prepayment Fee, Percentage	1.00%
Prior to First Anniversary Of Debt Issuance [Member] | Bank Credit Facility Amendment | Subsidiary, Borgata [Member] | Line of Credit [Member] | Incremental Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Prepayment Fee, Percentage	2.00%

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (MAC, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2000
MAC
Investments, Owned, Federal Income Tax Note [Line Items]
Land contributed by joint venture partner	$9.20
Debt securities contributed by joint venture partner	13.8
Assets contributed by joint venture partner	$90

Income_Taxes_Provision_Benefit

Income Taxes (Provision (Benefit) for Income Taxes) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense		$500,000	$500,000
State
Current	4,152,000	2,000	57,000
Deferred	-753,000	-4,505,000	-1,310,000
Provision for (benefit from) state income taxes	$3,399,000	($4,503,000)	($1,253,000)

Income_Taxes_Reconciliation_of

Income Taxes (Reconciliation of Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Tax provision at state statutory rate	9.00%	9.00%	9.00%
Accrued interest on uncertain tax benefits	3.20%	-1.50%	-2.10%
New jobs investment tax credit	0.00%	0.00%	-1.90%
Other, net	0.30%	-0.10%	-0.30%
Total state income tax provision	12.50%	7.40%	4.70%

Income_Taxes_Deferred_Tax_Asse

Income Taxes (Deferred Tax Assets and Liabilities) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Deferred state tax assets
Net operating loss carryforward	$3,037,000	$9,257,000
Provision for doubtful accounts	580,000	492,000
Reserve for employee benefits	1,490,000	1,466,000
Accrued expenses	1,454,000	1,150,000
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	1,031,000	921,000
Interest accrued on uncertain tax benefits	704,000	765,000
Gross deferred state tax assets	8,296,000	14,051,000
Deferred state tax liabilities
Difference between book and tax basis of property	10,215,000	17,728,000
Prepaid services and supplies	825,000	657,000
Other	193,000	227,000
Gross deferred state tax liabilities	11,233,000	18,612,000
Net deferred state tax liabilities	2,937,000	4,561,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$33,700,000

Income_Taxes_Deferred_Tax_Asse1

Income Taxes (Deferred Tax Assets and Liabilities, Balance Sheet Location) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Income Tax Disclosure [Abstract]
Non-current deferred income tax liability	$6,315	$7,049
Current deferred income tax asset	-3,378	-2,488
Net deferred state tax liabilities	$2,937	$4,561

Income_Taxes_Unrecognized_Tax_

Income Taxes (Unrecognized Tax Benefits) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefit, January 1	$6,221,000	$6,225,000	$9,068,000
Additions based on tax positions related to current year	1,000	1,000	10,000
Additions based on tax positions related to prior years	0	0	0
Reductions based on tax positions settled with taxing authorities	0	0	-1,078,000
Reductions based on tax positions related to prior years	-5,000	-5,000	-1,775,000
Unrecognized tax benefit, December 31	6,217,000	6,221,000	6,225,000
Unrecognized tax benefits that would impact effective tax rate	6,000,000
Unrecognized tax benefits that would impact deferred income taxes	200,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense		500,000	500,000
Income tax penalties and interest accrued	3,500,000	3,000,000
Internal Revenue Service (IRS)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Reductions based on tax positions settled with taxing authorities			-2,900,000
Maximum | Internal Revenue Service (IRS)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Reductions based on tax positions settled with taxing authorities	($6,200,000)

Commitments_and_Contingencies_1

Commitments and Contingencies (Narrative) (Details) (USD $)	1 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2007	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Loss Contingencies [Line Items]
Operating Leases, Rent Expense		$15.90	$14.70	$13.80
Due from Related Parties		0.2	0.3
Initial term of utility contract	20 years	50 years
Reimbursable expenses			0.7	0.6
Investment Alternative Tax:
New Jersey Casino Reinvestment Development Authority obligation		9.1	7.8	7.7
New Jersey Casino Reinvestment Development Authority obligation, valuation provision recorded		2.4	2.2	4.4
Revitalization District Tax
Loss Contingencies [Line Items]
Expense under the agreement recorded in period		7.4	6.5	6.1
Atlantic City Tourism District:
Initial term of ACA assessment		5 years
Atlantic City Alliance initial contribution		5
ACA annual assessment by all casinos		30
ACA total five year assessment by all casinos plus initial contribution		155
Purchase Commitment, Thermal Energy Commitment
Loss Contingencies [Line Items]
Annual purchase commitments		11.7
Long-Term Purchase Commitment, Electricity Commitment
Loss Contingencies [Line Items]
Annual purchase commitments		1.7
On-line Gaming [Member] | State of New Jersey [Member]
Loss Contingencies [Line Items]
State Gaming Licenses, Annual Fee, Percentage of Licensee Gross Gaming Revenues		2.50%
State Alternative Investment Tax, Percentage of Gross Gaming Revenues		5.00%
Land-based gaming [Member] | State of New Jersey [Member]
Loss Contingencies [Line Items]
State Gaming Licenses, Annual Fee, Percentage of Licensee Gross Gaming Revenues		1.25%
State Alternative Investment Tax, Percentage of Gross Gaming Revenues		2.50%
Borgata [Member]
Leases:
Owned land, acres		26
Land subject to ground leases		20
Borgata [Member] | Land Underlying Parking Garage
Leases:
Land subject to ground leases		2
Borgata [Member] | Land Underlying Public Space Expansion
Leases:
Land subject to ground leases		4
Borgata [Member] | Land Underlying Rooms Expansion
Leases:
Land subject to ground leases		2
Borgata [Member] | Land Underlying Parking Structure
Leases:
Land subject to ground leases		3
Borgata [Member] | Land Comprising Surface Parking Lot [Member]
Leases:
Land subject to ground leases		8
Borgata [Member] | Undeveloped Land Parcel
Leases:
Land subject to ground leases		1
Alternative Parking Structure Ground Lease [Member]
Loss Contingencies [Line Items]
Operating Leases, Rent Expense			$6.10	$5.80

Commitments_and_Contingencies_2

Commitments and Contingencies (Minimum Lease Obligations) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Loss Contingencies [Line Items]
Property Tax, Incurred on Ground Leases	$9,200,000	$18,300,000	$15,600,000
2013	8,258,000
2014	7,288,000
2015	6,705,000
2016	6,573,000
2017	6,280,000
Thereafter	320,289,000
Total	355,393,000
Operating Leases, Rent Expense	15,900,000	14,700,000	13,800,000
Alternative Parking Structure Ground Lease [Member]
Loss Contingencies [Line Items]
Operating Leases, Rent Expense		$6,100,000	$5,800,000

Commitments_and_Contingencies_3

Commitments and Contingencies (Future Minimum Sublease Rental Income) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
2013	$1,753,000
2014	1,525,000
2015	1,444,000
2016	1,444,000
2017	1,444,000
Thereafter	5,232,000
Total	12,842,000
Rental income	$2,700,000	$3,100,000	$3,300,000

Commitments_and_Contingencies_4

Commitments and Contingencies Loss Contingencies (Details) (Subsidiary, Borgata [Member], Property Tax Assessment [Member], USD $)	Dec. 31, 2010	Dec. 31, 2009
In Millions, unless otherwise specified
Settled Valuation [Member]
Loss Contingencies [Line Items]
Real property valuation	$870	$880
Original Valuation [Member]
Loss Contingencies [Line Items]
Real property valuation		$2,300

Commitments_and_Contingencies_5

Commitments and Contingencies Gain Contingencies (Details) (Subsidiary, Borgata [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Real Estate Tax Expense [Member]
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	$49
Gain Contingency, Unrecorded Amount, Interest	12
2014 [Member]
Gain Contingencies [Line Items]
Income Tax Credits and Adjustments	19.25
2011-2013 [Member] | Real Estate Tax Expense [Member]
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	$88.25

Fair_Value_Measurements_Fair_V

Fair Value Measurements (Fair Value Measurement Inputs) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Cash and Cash Equivalents, Current	$5,676	$0
Cash and cash equivalents	36,054	37,527	34,125	46,224
Fair Value, Measurements, Recurring | Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	36,054	37,527
Restricted Cash and Cash Equivalents, Current	5,676
CRDA investments, net	9,158	4,613
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Cash and Cash Equivalents, Current	5,676
Cash and cash equivalents	36,054	37,527
CRDA investments, net	0	0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Restricted Cash and Cash Equivalents, Current	0
CRDA investments, net	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Restricted Cash and Cash Equivalents, Current	0
CRDA investments, net	$9,158	$4,613

Fair_Value_Measurements_Change

Fair Value Measurements (Changes in Fair Value of Level 3 Assets) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CRDA Deposits [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	$7,239	$6,651
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	-2,378	-7,825
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	9,158	4,613	28,464
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	$316	($22,677)

Fair_Value_Measurements_Fair_V1

Fair Value Measurements (Fair Value Balance Sheet Grouping) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Outstanding Principal	$754,900	$813,400
Long-term debt	754,900	813,400
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	745,319	801,260
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	766,637	847,272
Level 2 | Revolving Credit Facility | Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Outstanding Principal	13,700	39,900
Level 2 | Revolving Credit Facility | Revolving Credit Facility | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	13,700	39,900
Level 2 | Revolving Credit Facility | Revolving Credit Facility | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	13,700	39,900
Level 1 | Term Loan [Member] | Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Outstanding Principal	347,700
Level 1 | Incremental Term Loan | Secured Debt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Outstanding Principal		380,000
Level 1 | Incremental Term Loan | Secured Debt [Member] | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	344,999	376,234
Level 1 | Incremental Term Loan | Secured Debt [Member] | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	340,746	381,900
Level 1 | 9.875% Senior Secured Notes due 2018 | Secured Debt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Outstanding Principal	393,500	393,500
Level 1 | 9.875% Senior Secured Notes due 2018 | Secured Debt [Member] | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	386,620	385,126
Level 1 | 9.875% Senior Secured Notes due 2018 | Secured Debt [Member] | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$412,191	$425,472

Other_Operating_Items_Net_Deta

Other Operating Items, Net (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of Other Operating Items [Line Items]
Impairments of assets	$0	$5,032	$2,811
Other operating items, net	($1,746)	$3,318	($7,700)
9.875% Senior Secured Notes due 2018 | Senior Secured Notes
Components of Other Operating Items [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	9.88%	9.88%

Employee_Benefit_Plans_Retirem

Employee Benefit Plans (Retirement Savings Plan Under Section 401(k)) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]
Contributions based on wages paid to covered employees	$7.90	$7.30	$6.70
Our share of unfunded vested liabilities related to certain multi-employer pension plans		126.6
Maximum employee contributions, percentage of Income	100.00%
Voluntary contributions to the 401(k) profit-sharing plans and trusts	$1.30	$1.40	$1.40

Selected_Quarterly_Financial_I2

Selected Quarterly Financial Information (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$179,147	$209,946	$181,854	$167,264	$157,128	$200,051	$172,877	$165,644	$738,211	$695,700	$686,222
Operating income	21,251	43,437	27,596	6,322	-1,749	28,712	6,944	12,204	98,606	46,111	56,458
Net income (loss)	$2,634	$22,977	$8,762	($10,664)	($40,765)	$5,180	($12,957)	($8,035)	$23,709	($56,577)	($25,191)

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
Property Tax, Incurred on Ground Leases	$9.20	$18.30	$15.60
MGM
Related Party Transaction [Line Items]
Land subject to ground leases	8
BAC
Related Party Transaction [Line Items]
Related party payables	0.1	0.4
Related party expenditures	2.9	7.7	10.9
Land Comprising Surface Parking Lot [Member]
Related Party Transaction [Line Items]
Property Tax, Incurred on Ground Leases	$1	$3.20	$2.80