Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Summary of uncertain tax positions included in income tax provision
Current provision for UTPs	$ (1,375)	$ (5,123)	$ (1,913)	$ (2,479)
Deferred benefit for UTPs	260	3,578	438	4,267
Total income tax (provision) benefit for UTPs	(1,115)	(1,545)	(1,475)	1,788
(Provision) benefit for UTPs included in income from discontinued operations	(354)	(620)	(2,117)	893
(Provision) benefit for UTPs on income from continuing operations	$ (761)	$ (925)	$ 642	$ 895