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Basis of Presentation (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Components of accumulated other comprehensive loss [Abstract]          
Foreign currency translation adjustment $ (15)   $ (15)   $ (34)
Pension liability, net of tax of $(4,174) (12,081)   (12,081)   (12,081)
Unrealized losses on cash flow hedges, net of tax of $(17) and $(109) (376)   (376)   (2,381)
Accumulated other comprehensive loss (12,472)   (12,472)   (14,496)
Pension liability, tax effect (4,174)   (4,174)   (4,174)
Unrealized losses on cash flow hedges, tax effect (17)   (17)   (109)
Derivative Instruments, Gain (Loss) [Line Items]          
Tax benefit 46 12 92 12  
Net of tax (1,003) (271) (2,005) (271)  
Interest expense [Member]
          
Derivative Instruments, Gain (Loss) [Line Items]          
Gross $ (1,049) $ (283) $ (2,097) $ (283)