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Condensed Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidated Statements of Changes in Shareholders' Equity
Stock option activity, tax benefit	$ 2,058	$ 288
Change in fair value of interest rate swap contracts, income taxes	3,610	4,171
Cumulative effect of adoption of amendments to ASC 924 regarding jackpot liabilities, income taxes	$ 1,068

Total tax effect of the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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