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Provision (Benefit) for Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Current      
Federal $ (75,119) $ 27,724 $ 9,619
State 506 6,637 6,880
Foreign 263 229 (30)
Current Income Tax Expense (Benefit) (74,350) 34,590 16,469
Deferred      
Federal 10,177 16,243 12,865
State (4,423) (3,180) 1,931
Foreign (125) (193) (19)
Deferred tax expense 5,629 12,870 14,777
Income tax provision $ (68,721) $ 47,460 $ 31,246