Income Taxes (Details) (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 income Tax Provisions
Total current income tax provision	$ (1,582)	$ (6,942)	$ (2,179)	$ (5,353)
Total deferred income tax provision	(888)	(13,477)	(6,873)	(30,429)
Total income tax provision	(2,470)	(20,419)	(9,052)	(35,782)
Income tax provision included in income from discontinued operations	(8,233)	(10,965)	(11,593)	(23,831)
Income tax benefit (provision) on income from continuing operations	$ 5,763	$ (9,454)	$ 2,541	$ (11,951)