Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net earnings and comprehensive income	$ 49,929	$ 36,962
Adjustments to reconcile net earnings and comprehensive income to net cash provided by operating activities:
Depreciation and amortization	27,445	27,876
Asset impairment loss	0	157
Gain on asset disposition	(27)	(46)
Gain on sale of business	0	(271)
Gain on derivative instruments	0	(3,096)
Equity in loss (gain) of unconsolidated investments	784	(44)
Share-based compensation	4,414	2,966
Deferred tax provision	0	(1,566)
Other	455	2,036
Increase (decrease) in cash resulting from changes in operating assets and liabilities, net of business acquisition:
Restricted cash	(2,409)	(4,607)
Accounts receivable	(20,157)	(7,810)
Other current assets	(4,013)	(5,136)
Accounts payable	6,488	8,930
Purses payable	2,944	6,028
Accrued expenses	3,798	6,247
Deferred revenue	(7,061)	3,306
Income taxes receivable and payable	30,993	31,097
Other assets and liabilities	2,467	1,780
Net cash provided by operating activities	96,050	104,809
Cash flows from investing activities:
Additions to property and equipment	(16,473)	(10,867)
Acquisition of business, net of cash	(6,728)	0
Acquisition of gaming license	0	(2,250)
Investment in joint venture	(5,400)	0
Purchases of minority investments	(1,600)	0
Assumption of note receivable	(1,100)	0
Proceeds on sale of property and equipment	88	46
Proceeds from insurance recoveries	9,870	0
Change in deposit wagering asset	(6,651)	(873)
Net cash used in investing activities	(27,994)	(13,944)
Cash flows from financing activities:
Borrowings on bank line of credit	182,545	157,403
Repayments on bank line of credit	(247,143)	(237,560)
Change in bank overdraft	1,280	1,159
Payment of dividends	(10,110)	(8,165)
Repurchase of common stock	(2,033)	(445)
Common stock issued	4,416	0
Windfall tax benefit from share-based compensation	640	0
Change in deposit wagering liability	6,811	873
Net cash used in financing activities	(63,594)	(86,735)
Net increase in cash and cash equivalents	4,462	4,130
Cash and cash equivalents, beginning of period	27,325	26,901
Cash and cash equivalents, end of period	31,787	31,031
Supplemental Cash Flow Information [Abstract]
Interest	1,227	3,549
Income taxes	593	1,282
Issuance of common stock in connection with Company LTIP and other stock plans	5,110	4,319
Issuance of common stock for extinguishment of convertible note payable	0	19,399
Assets acquired and liabilities assumed from acquisition of business:
Fair value of assets assumed	9,454	0
Liabilities assumed	(395)	0
Fair value of earn-out liability and accrued purchase price	$ (2,331)	$ 0