Supplementary Condensed Consolidating Financial Information of Parent Guarantor and Subsidiary Issuers (Cash Flow) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating activities
Net income	$ 45,945	$ 47,012	$ 93,032	$ 91,324
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	27,617	26,349	55,028	52,871
Amortization of debt issuance costs			4,039	4,018
Losses on dispositions of property			67	159
Deferred income taxes			(1,537)	(1,919)
Stock-based compensation			8,505	5,087
Decrease (increase),
Prepaid expenses and other current assets			3,390	(17,296)
Other assets			(4)	(1,309)
Intercompany			0	0
(Decrease) increase,
Accounts payable			(665)	8,183
Accrued expenses			3,767	(6,360)
Accrued interest			(14)	(565)
Accrued salaries and wages			(3,441)	104
Gaming, property and other taxes			(989)	7,970
Income taxes			229	(18,476)
Other current and noncurrent liabilities			662	2,430
Net cash provided by operating activities			162,069	126,221
Investing activities
Capital project expenditures, net of reimbursements	(5,110)	(31,502)	(10,750)	(55,504)
Capital maintenance expenditures	(775)	(597)	(1,726)	(1,468)
Proceeds from sale of property and equipment			97	6
Funding of loan receivable			0	(43,000)
Principal payments on loan receivable			1,075	7,000
Acquisition of real estate			0	(140,730)
Other investing activities			(37)	0
Net cash used in investing activities			(11,341)	(233,696)
Financing activities
Dividends paid			(125,522)	(329,224)
Proceeds from exercise of options			12,928	17,463
Proceeds from issuance of long-term debt			0	208,000
Financing costs			0	(306)
Payments of long-term debt			(43,048)	(32,000)
Intercompany financing			0	0
Net cash used in financing activities			(155,642)	(136,067)
Net decrease in cash and cash equivalents			(4,914)	(243,542)
Cash and cash equivalents at beginning of period			35,973	285,221
Cash and cash equivalents at end of period	31,059	41,679	31,059	41,679
Eliminations
Operating activities
Net income			(24,689)	(739,255)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation			0	0
Amortization of debt issuance costs			0	0
Losses on dispositions of property			0	0
Deferred income taxes			0	0
Stock-based compensation			0	0
Decrease (increase),
Prepaid expenses and other current assets			0	1,220
Other assets			0	0
Intercompany			0	0
(Decrease) increase,
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	(1,220)
Other current and noncurrent liabilities			0	0
Net cash provided by operating activities			(24,689)	(739,255)
Investing activities
Capital project expenditures, net of reimbursements			0	0
Capital maintenance expenditures			0	0
Proceeds from sale of property and equipment			0	0
Funding of loan receivable				0
Principal payments on loan receivable			0	0
Acquisition of real estate				0
Other investing activities			0
Net cash used in investing activities			0	0
Financing activities
Dividends paid			0	0
Proceeds from exercise of options			0	0
Proceeds from issuance of long-term debt				0
Financing costs				0
Payments of long-term debt			0	0
Intercompany financing			24,689	739,255
Net cash used in financing activities			24,689	739,255
Net decrease in cash and cash equivalents			0	0
Cash and cash equivalents at beginning of period			0	0
Cash and cash equivalents at end of period	0	0	0	0
Parent Guarantor
Operating activities
Net income			0	329,933
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation			0	901
Amortization of debt issuance costs			0	0
Losses on dispositions of property			0	0
Deferred income taxes			0	0
Stock-based compensation			0	5,087
Decrease (increase),
Prepaid expenses and other current assets			0	318
Other assets			0	(1,288)
Intercompany			0	(2,711)
(Decrease) increase,
Accounts payable			0	7,320
Accrued expenses			0	(7,641)
Accrued interest			0	0
Accrued salaries and wages			0	880
Gaming, property and other taxes			0	50
Income taxes			0	(1,442)
Other current and noncurrent liabilities			0	1,216
Net cash provided by operating activities			0	332,623
Investing activities
Capital project expenditures, net of reimbursements			0	(1,586)
Capital maintenance expenditures			0	0
Proceeds from sale of property and equipment			0	0
Funding of loan receivable				0
Principal payments on loan receivable			0	0
Acquisition of real estate				0
Other investing activities			0
Net cash used in investing activities			0	(1,586)
Financing activities
Dividends paid			(125,522)	(329,224)
Proceeds from exercise of options			12,928	17,463
Proceeds from issuance of long-term debt				0
Financing costs				0
Payments of long-term debt			0	0
Intercompany financing			109,951	(54,999)
Net cash used in financing activities			(2,643)	(366,760)
Net decrease in cash and cash equivalents			(2,643)	(35,723)
Cash and cash equivalents at beginning of period			2,643	42,801
Cash and cash equivalents at end of period	0	7,078	0	7,078
Subsidiary Issuers
Operating activities
Net income			93,904	122,366
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation			47,264	44,437
Amortization of debt issuance costs			4,039	4,018
Losses on dispositions of property			46	0
Deferred income taxes			0	0
Stock-based compensation			8,505	0
Decrease (increase),
Prepaid expenses and other current assets			938	(16,415)
Other assets			(1)	0
Intercompany			2,244	(867)
(Decrease) increase,
Accounts payable			(694)	1,089
Accrued expenses			4,172	880
Accrued interest			(14)	(565)
Accrued salaries and wages			(3,178)	0
Gaming, property and other taxes			(973)	6,252
Income taxes			122	(7,365)
Other current and noncurrent liabilities			749	0
Net cash provided by operating activities			157,123	153,830
Investing activities
Capital project expenditures, net of reimbursements			(4,853)	(53,918)
Capital maintenance expenditures			0	0
Proceeds from sale of property and equipment			91	0
Funding of loan receivable				0
Principal payments on loan receivable			0	0
Acquisition of real estate				0
Other investing activities			(37)
Net cash used in investing activities			(4,799)	(53,918)
Financing activities
Dividends paid			0	0
Proceeds from exercise of options			0	0
Proceeds from issuance of long-term debt				208,000
Financing costs				(306)
Payments of long-term debt			(43,048)	(32,000)
Intercompany financing			(110,004)	(491,524)
Net cash used in financing activities			(153,052)	(315,830)
Net decrease in cash and cash equivalents			(728)	(215,918)
Cash and cash equivalents at beginning of period			4,450	221,095
Cash and cash equivalents at end of period	3,722	5,177	3,722	5,177
Other Subsidiary Non-Issuers
Operating activities
Net income			23,817	378,280
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation			7,764	7,533
Amortization of debt issuance costs			0	0
Losses on dispositions of property			21	159
Deferred income taxes			(1,537)	(1,919)
Stock-based compensation			0	0
Decrease (increase),
Prepaid expenses and other current assets			2,452	(2,419)
Other assets			(3)	(21)
Intercompany			(2,244)	3,578
(Decrease) increase,
Accounts payable			29	(226)
Accrued expenses			(405)	401
Accrued interest			0	0
Accrued salaries and wages			(263)	(776)
Gaming, property and other taxes			(16)	1,668
Income taxes			107	(8,449)
Other current and noncurrent liabilities			(87)	1,214
Net cash provided by operating activities			29,635	379,023
Investing activities
Capital project expenditures, net of reimbursements			(5,897)	0
Capital maintenance expenditures			(1,726)	(1,468)
Proceeds from sale of property and equipment			6	6
Funding of loan receivable				(43,000)
Principal payments on loan receivable			1,075	7,000
Acquisition of real estate				(140,730)
Other investing activities			0
Net cash used in investing activities			(6,542)	(178,192)
Financing activities
Dividends paid			0	0
Proceeds from exercise of options			0	0
Proceeds from issuance of long-term debt				0
Financing costs				0
Payments of long-term debt			0	0
Intercompany financing			(24,636)	(192,732)
Net cash used in financing activities			(24,636)	(192,732)
Net decrease in cash and cash equivalents			(1,543)	8,099
Cash and cash equivalents at beginning of period			28,880	21,325
Cash and cash equivalents at end of period	$ 27,337	$ 29,424	$ 27,337	$ 29,424