Restatement (Details) - USD ($) $ in Thousands				3 Months Ended			6 Months Ended		12 Months Ended
	Oct. 01, 2014	Nov. 01, 2013	Oct. 01, 2013	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Restatement
Depreciation expense				$ 62,275	$ 69,874		$ 125,644	$ 140,059
Long-term debt				1,289,165			1,289,165
General and administrative expense				118,901	107,735		235,157	215,310
Increase to income tax provision				16,221	20,111		26,636	22,112
Other non-current liabilities				27,356			27,356		$ 27,447
Interest expense				109,798	105,069		218,144	209,583
Restatement adjustment
Restatement
Rent expense				(109,519)	(104,613)		(218,364)	(208,922)
Depreciation expense				20,523	22,691		40,970	45,510
General and administrative expense				329	(163)		516	(327)
Increase to income tax provision				5,067	11,357		6,222	6,558
Other non-current liabilities				19,896			19,896		19,189
Interest expense				97,503	94,177		193,686	187,396
Previously reported
Restatement
Rent expense				109,519	104,613		218,364	208,922
Depreciation expense				41,752	47,183		84,674	94,549
General and administrative expense				118,572	107,898		234,641	215,637
Increase to income tax provision				11,154	8,754		20,414	15,554
Other non-current liabilities				7,460			7,460		8,258
Interest expense				12,295	10,892		24,458	22,187
Revision of sale-leaseback to financing obligation
Restatement
Period of cumulative pre-tax loss position						3 years
Revision of sale-leaseback to financing obligation | Restatement adjustment
Restatement
Additional liabilities representing the present value of future minimum lease payments				3,590,000			3,590,000		3,610,000
Interest expense				97,300	94,000		193,400	187,100
Depreciation expense				22,800	22,200		45,500	44,400
Increase to income tax provision				8,000	16,500		13,100	16,700
Revision of sale-leaseback to financing obligation | Previously reported
Restatement
Rent expense				109,500	104,600		218,400	208,900
Correction of errors in goodwill and indefinite-lived gaming license intangible asset impairment analyses | Restatement adjustment
Restatement
Goodwill and other intangible asset impairment charge									(161,200)	$ (334,100)
Correction of errors in goodwill and indefinite-lived gaming license intangible asset impairment analyses | Previously reported
Restatement
Goodwill and other intangible asset impairment charge	$ 316,500	$ 745,900	$ 312,500
Reclassification of real estate zoning costs to cost of gaming licenses within other intangible assets | Restatement adjustment
Restatement
Depreciation expense				(2,700)			(5,300)
Reclassification of real estate zoning costs to cost of gaming licenses within other intangible assets | Previously reported
Restatement
Property and equipment, net									150,000
Correction of corporate airplane lease accounting treatment | Restatement adjustment
Restatement
Property and equipment, net				6,000			6,000		7,000
Interest expense				200			200	300
Depreciation expense				500	1,000		500	1,000
Long-term debt				24,900			24,900		24,900
General and administrative expense				(200)	$ (300)		(200)	$ (300)
Reclassification of contingent earn-out liability | Restatement adjustment
Restatement
Long-term debt				(19,900)			(19,900)		(19,200)
General and administrative expense				400			700
Other non-current liabilities				19,900			19,900		$ 19,200
Interest expense				$ (400)			$ (700)