Condensed Consolidated Statements of Changes in Shareholders' Equity (USD $)	Total USD ($)	Preferred Stock	Common Stock USD ($)	Additional Paid-In Capital USD ($)	Retained Earnings USD ($)	Accumulated Other Comprehensive (Loss) Income USD ($)	Noncontrolling Interests USD ($)	Comprehensive Income (Loss) USD ($)
Balance at Dec. 31, 2009	$ 1,852,076,000		$ 786,000	$ 1,480,476,000	$ 397,407,000	$ (26,028,000)	$ (565,000)
Balance (in shares) at Dec. 31, 2009		12,500	78,972,256
Increase (Decrease) in Shareholders' Equity
Repurchase of preferred stock	(11,200,000)			(11,200,000)
Repurchase of preferred stock (in shares)		(225)
Stock option activity, including tax benefit of $2,058 and $288 for six months ended June 30, 2011 and 2010, respectively	13,519,000		2,000	13,517,000
Stock option activity (in shares)			243,734
Share activity	(9,912,000)		(3,000)	(9,909,000)
Share activity (in shares)			(408,790)
Restricted stock activity	3,221,000			3,221,000
Restricted stock activity (in shares)			165,110
Change in fair value of interest rate swap contracts, net of income taxes of $3,610 and $4,171 for six months ended June 30, 2011 and 2010, respectively	7,002,000					7,002,000		7,002,000
Change in fair value of corporate debt securities	744,000					744,000		744,000
Foreign currency translation adjustment	14,000					14,000		14,000
Net income (loss)	43,127,000				45,320,000		(2,193,000)	43,127,000
Comprehensive Income (Loss)								50,887,000
Stockholders' Equity, Period Increase (Decrease)	46,515,000
Balance at Jun. 30, 2010	1,898,591,000		785,000	1,476,105,000	442,727,000	(18,268,000)	(2,758,000)
Balance (in shares) at Jun. 30, 2010		12,275	78,972,310
Balance at Dec. 31, 2010	1,777,766,000		779,000	1,446,932,000	337,940,000	(7,885,000)
Balance (in shares) at Dec. 31, 2010		12,275	78,414,022
Increase (Decrease) in Shareholders' Equity
Stock option activity, including tax benefit of $2,058 and $288 for six months ended June 30, 2011 and 2010, respectively	19,921,000		4,000	19,917,000
Stock option activity (in shares)			357,616
Restricted stock activity	2,182,000			2,182,000
Restricted stock activity (in shares)			97,005
Change in fair value of interest rate swap contracts, net of income taxes of $3,610 and $4,171 for six months ended June 30, 2011 and 2010, respectively	6,405,000					6,405,000		6,405,000
Change in fair value of corporate debt securities	910,000					910,000		910,000
Foreign currency translation adjustment	497,000					497,000		497,000
Cumulative-effect of adoption of amendments to ASC 924 regarding jackpot liabilities, net of income taxes of $1,068	2,911,000				2,911,000
Net income (loss)	127,517,000				127,517,000			127,517,000
Comprehensive Income (Loss)								135,329,000
Balance at Jun. 30, 2011	$ 1,938,109,000		$ 783,000	$ 1,469,031,000	$ 468,368,000	$ (73,000)
Balance (in shares) at Jun. 30, 2011		12,275	78,868,643