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Consolidated Statements of Comprehensive Income (Loss) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Statement Of Income And Comprehensive Income [Abstract]      
Net income (loss) $ (923) $ 16,244 $ 12,660
Other comprehensive income (loss):      
Pension liability adjustment, net of tax 913 138 (667)
Deferred gain (loss) on cash flow derivatives, net of tax 99 (99) 211
Other comprehensive income (loss) 1,012 39 (456)
Comprehensive income $ 89 $ 16,283 $ 12,204