Supplementary Condensed Consolidating Financial Information of Parent Guarantor and Subsidiary Issuers (Cash Flow) (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating activities
Net income	$ 93,033,000	$ 93,010,000	$ 91,998,000	$ 96,772,000	$ 186,043,000	$ 188,770,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization					138,939,000	60,932,000
Amortization of debt issuance costs, bond premiums and original issuance discounts					5,790,000	6,296,000
Losses on dispositions of property					13,000	225,000
Deferred income taxes					(466,000)	(117,000)
Stock-based compensation					8,508,000	4,603,000
Straight-line rent adjustments	8,643,000				17,287,000	33,233,000
Losses on debt extinguishment	0		3,473,000		0	3,473,000
Loan impairment charges	0		0		13,000,000	0
(Increase), decrease
Prepaid expenses and other assets					(2,312,000)	(1,123,000)
Intercompany					0	0
Increase, (decrease)
Accounts payable					(2,340,000)	(254,000)
Accrued expenses					1,305,000	157,000
Accrued interest					8,079,000	2,367,000
Accrued salaries and wages					(8,890,000)	6,607,000
Gaming, property and other taxes					(98,000)	(119,000)
Income taxes					0	0
Other liabilities					(777,000)	572,000
Net cash provided by operating activities					364,081,000	305,622,000
Investing activities
Capital project expenditures	0		(14,000)		0	(14,000)
Capital maintenance expenditures	(1,017,000)		(1,162,000)		(1,547,000)	(1,984,000)
Proceeds from sale of property and equipment					190,000	227,000
Collections of principal payments on investment in direct financing lease					0	29,239,000
Net cash (used in) provided by investing activities					(1,357,000)	27,468,000
Financing activities
Dividends paid					(292,414,000)	(269,537,000)
Taxes paid related to shares withheld for tax purposes on restricted stock award vestings, net of proceeds from exercise of options					(9,057,000)	(2,905,000)
Proceeds from issuance of long-term debt					155,000,000	1,000,000,000
Financing costs					(236,000)	(19,745,000)
Repayments of long-term debt					(217,061,000)	(923,601,000)
Premium and related costs paid on tender of senior unsecured notes					0	(1,884,000)
Intercompany financing					0	0
Net cash used in financing activities					(363,768,000)	(217,672,000)
Net (decrease) increase in cash and cash equivalents					(1,044,000)	115,418,000
Cash and cash equivalents at beginning of period		25,783,000		29,054,000	25,783,000	29,054,000
Cash and cash equivalents at end of period	24,739,000		144,472,000		24,739,000	144,472,000
Eliminations
Operating activities
Net income	(133,513,000)		(114,886,000)		(251,336,000)	(221,674,000)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization					0	0
Amortization of debt issuance costs, bond premiums and original issuance discounts					0	0
Losses on dispositions of property					0	0
Deferred income taxes					0	0
Stock-based compensation					0	0
Straight-line rent adjustments					0	0
Losses on debt extinguishment			0			0
Loan impairment charges					0
(Increase), decrease
Prepaid expenses and other assets					650,000	1,073,000
Intercompany					0	0
Increase, (decrease)
Accounts payable					0	0
Accrued expenses					0	0
Accrued interest					0	0
Accrued salaries and wages					0	0
Gaming, property and other taxes					0	0
Income taxes					(650,000)	(1,073,000)
Other liabilities					0	0
Net cash provided by operating activities					(251,336,000)	(221,674,000)
Investing activities
Capital project expenditures						0
Capital maintenance expenditures					0	0
Proceeds from sale of property and equipment					0	0
Collections of principal payments on investment in direct financing lease						0
Net cash (used in) provided by investing activities					0	0
Financing activities
Dividends paid					0	0
Taxes paid related to shares withheld for tax purposes on restricted stock award vestings, net of proceeds from exercise of options					0	0
Proceeds from issuance of long-term debt					0	0
Financing costs					0	0
Repayments of long-term debt					0	0
Premium and related costs paid on tender of senior unsecured notes						0
Intercompany financing					251,336,000	221,674,000
Net cash used in financing activities					251,336,000	221,674,000
Net (decrease) increase in cash and cash equivalents					0	0
Cash and cash equivalents at beginning of period		0		0	0	0
Cash and cash equivalents at end of period	0		0		0	0
Parent Guarantor
Operating activities
Net income	0		0		0	0
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization					0	0
Amortization of debt issuance costs, bond premiums and original issuance discounts					0	0
Losses on dispositions of property					0	0
Deferred income taxes					0	0
Stock-based compensation					0	0
Straight-line rent adjustments					0	0
Losses on debt extinguishment			0			0
Loan impairment charges					0
(Increase), decrease
Prepaid expenses and other assets					0	0
Intercompany					0	0
Increase, (decrease)
Accounts payable					0	0
Accrued expenses					0	0
Accrued interest					0	0
Accrued salaries and wages					0	0
Gaming, property and other taxes					0	0
Income taxes					0	0
Other liabilities					0	0
Net cash provided by operating activities					0	0
Investing activities
Capital project expenditures						0
Capital maintenance expenditures					0	0
Proceeds from sale of property and equipment					0	0
Collections of principal payments on investment in direct financing lease						0
Net cash (used in) provided by investing activities					0	0
Financing activities
Dividends paid					(292,414,000)	(269,537,000)
Taxes paid related to shares withheld for tax purposes on restricted stock award vestings, net of proceeds from exercise of options					(9,057,000)	(2,905,000)
Proceeds from issuance of long-term debt					0	0
Financing costs					0	0
Repayments of long-term debt					0	0
Premium and related costs paid on tender of senior unsecured notes						0
Intercompany financing					301,471,000	272,442,000
Net cash used in financing activities					0	0
Net (decrease) increase in cash and cash equivalents					0	0
Cash and cash equivalents at beginning of period		0		0	0	0
Cash and cash equivalents at end of period	0		0		0	0
Subsidiary Issuers
Operating activities
Net income	135,752,000		107,249,000		277,259,000	225,373,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization					75,572,000	47,624,000
Amortization of debt issuance costs, bond premiums and original issuance discounts					5,790,000	6,296,000
Losses on dispositions of property					7,000	(9,000)
Deferred income taxes					0	0
Stock-based compensation					8,508,000	4,603,000
Straight-line rent adjustments					1,326,000	28,655,000
Losses on debt extinguishment			3,473,000			3,473,000
Loan impairment charges					0
(Increase), decrease
Prepaid expenses and other assets					(2,999,000)	(2,146,000)
Intercompany					(79,000)	183,000
Increase, (decrease)
Accounts payable					(2,350,000)	(450,000)
Accrued expenses					478,000	(39,000)
Accrued interest					8,079,000	2,367,000
Accrued salaries and wages					(8,441,000)	7,544,000
Gaming, property and other taxes					(142,000)	(190,000)
Income taxes					(71,000)	125,000
Other liabilities					(749,000)	992,000
Net cash provided by operating activities					362,188,000	324,401,000
Investing activities
Capital project expenditures						(14,000)
Capital maintenance expenditures					(4,000)	(51,000)
Proceeds from sale of property and equipment					182,000	210,000
Collections of principal payments on investment in direct financing lease						0
Net cash (used in) provided by investing activities					178,000	145,000
Financing activities
Dividends paid					0	0
Taxes paid related to shares withheld for tax purposes on restricted stock award vestings, net of proceeds from exercise of options					0	0
Proceeds from issuance of long-term debt					155,000,000	1,000,000,000
Financing costs					(236,000)	(19,745,000)
Repayments of long-term debt					(217,061,000)	(923,601,000)
Premium and related costs paid on tender of senior unsecured notes						(1,884,000)
Intercompany financing					(301,472,000)	(272,444,000)
Net cash used in financing activities					(363,769,000)	(217,674,000)
Net (decrease) increase in cash and cash equivalents					(1,403,000)	106,872,000
Cash and cash equivalents at beginning of period		4,632,000		6,734,000	4,632,000	6,734,000
Cash and cash equivalents at end of period	3,229,000		113,606,000		3,229,000	113,606,000
Other Subsidiary Non-Issuers
Operating activities
Net income	90,794,000		99,635,000		160,120,000	185,071,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization					63,367,000	13,308,000
Amortization of debt issuance costs, bond premiums and original issuance discounts					0	0
Losses on dispositions of property					6,000	234,000
Deferred income taxes					(466,000)	(117,000)
Stock-based compensation					0	0
Straight-line rent adjustments					15,961,000	4,578,000
Losses on debt extinguishment			0			0
Loan impairment charges					13,000,000
(Increase), decrease
Prepaid expenses and other assets					37,000	(50,000)
Intercompany					79,000	(183,000)
Increase, (decrease)
Accounts payable					10,000	196,000
Accrued expenses					827,000	196,000
Accrued interest					0	0
Accrued salaries and wages					(449,000)	(937,000)
Gaming, property and other taxes					44,000	71,000
Income taxes					721,000	948,000
Other liabilities					(28,000)	(420,000)
Net cash provided by operating activities					253,229,000	202,895,000
Investing activities
Capital project expenditures						0
Capital maintenance expenditures					(1,543,000)	(1,933,000)
Proceeds from sale of property and equipment					8,000	17,000
Collections of principal payments on investment in direct financing lease						29,239,000
Net cash (used in) provided by investing activities					(1,535,000)	27,323,000
Financing activities
Dividends paid					0	0
Taxes paid related to shares withheld for tax purposes on restricted stock award vestings, net of proceeds from exercise of options					0	0
Proceeds from issuance of long-term debt					0	0
Financing costs					0	0
Repayments of long-term debt					0	0
Premium and related costs paid on tender of senior unsecured notes						0
Intercompany financing					(251,335,000)	(221,672,000)
Net cash used in financing activities					(251,335,000)	(221,672,000)
Net (decrease) increase in cash and cash equivalents					359,000	8,546,000
Cash and cash equivalents at beginning of period		$ 21,151,000		$ 22,320,000	21,151,000	22,320,000
Cash and cash equivalents at end of period	$ 21,510,000		$ 30,866,000		$ 21,510,000	$ 30,866,000