Income Taxes Income Taxes (Provision for Income Tax Schedule) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current tax provision
Federal	$ 39,517	$ 19,619	$ 1,393
State	2,953	4,993	4,229
Foreign	10,193	4,078	3,991
Deferred tax provision (benefit)
Federal	54,980	55,335	76,410
State	4,413	2,393	2,068
Foreign	1,209	4,269	3,238
Change in valuation allowance	(6,974)	465	(10)
Income Tax Expense (Benefit)	$ 106,291	$ 91,152	$ 91,319