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Income Taxes - Income before Taxes and Components of Income Tax Expense (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]    
U.S. $ 42,990 $ 10,318
Non U.S. (435) 278
Total 42,555 10,596
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]    
Current, U.S. Federal (16,910) (2,106)
Current, U.S. State (381) (99)
Current, Non-U.S. (74) (46)
Total current (17,365) (2,251)
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]    
Deferred, U.S. Federal 455 (1,271)
Deferred U.S. State 46 (23)
Deferred foreign 160 0
Deferred provision before change in valuation allowance 661 (1,294)
Change in valuation allowance 796 (122)
Total deferred 1,457 (1,416)
Tax (provision) benefit $ (15,908) $ (3,667)