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Income Taxes (Components Of Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
U.S. Federal	$ 50,197	$ 44,845	$ 24,308
State	6,338	5,515	2,448
Foreign	315
Current	48,540	37,635	24,784
Deferred	8,310	12,725	1,972
Income tax expense	$ 56,850	$ 50,360	$ 26,756

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The component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted federal tax law to the domestic taxable Income or Loss from continuing operations.

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