Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details)

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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Current taxes:        
Federal   $ (589) $ 0 $ (5,526)
State   122 730 860
Current income taxes   (467) 730 (4,666)
Deferred taxes:        
Federal   (62,581) 0 0
State   (13,261) 0 0
Deferred income taxes   (75,842) 0 0
Income tax expense (benefit) $ 8,400 $ (76,309) $ 730 $ (4,666)