Income Taxes Income Tax Components (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)	$ 173,912	$ 82,031	$ 134,231
Current State and Local Tax Expense (Benefit)	34,555	13,652	41,482
Current Foreign Tax Expense (Benefit)	0	(3,425)	(1,940)
Current Income Tax Expense (Benefit)	208,467	92,258	173,773
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Federal Income Tax Expense (Benefit)	(35,487)	8,463	49,672
Deferred State and Local Income Tax Expense (Benefit)	(17,524)	8,566	(2,242)
Deferred Income Tax Expense (Benefit)	(53,011)	17,029	47,430
Income Tax Expense (Benefit), Continuing Operations	$ 155,456	$ 109,287	$ 221,203