Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current income tax expense
Federal	$ (9,392)	$ 15,257	$ 13,586
U.S	30,010	248	14,610
State and local	4,177	9,947	1,066
Current income tax expense	24,795	25,452	29,262
Deferred income tax expense (benefit)
Federal	(1,333)	13,913	(22,529)
U.S	(18,470)	(66,136)	(758)
Total Deferred	(19,803)	(52,223)	(23,287)
Total income tax expense (benefit)	$ 4,992	$ (26,771)	$ 5,975