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Basis of Presentation (Details) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Sep. 30, 2013
Interest expense [Member]
Sep. 30, 2012
Interest expense [Member]
Sep. 30, 2013
Interest expense [Member]
Sep. 30, 2012
Interest expense [Member]
Components of accumulated other comprehensive loss [Abstract]              
Foreign currency translation adjustment $ 852   $ (34)        
Pension liability, net of tax of $(4,174) (12,081)   (12,081)        
Unrealized losses on cash flow hedges, net of tax of $0 and $(109) 0   (2,381)        
Accumulated other comprehensive loss (11,229)   (14,496)        
Pension liability, tax effect (4,174)   (4,174)        
Unrealized losses on cash flow hedges, tax effect 0   (109)        
Derivative Instruments, Gain (Loss) [Line Items]              
Gross       (393) (845) (2,490) (1,128)
Tax benefit       17 37 109 49
Net of tax $ 2,381 $ 1,079   $ (376) $ (808) $ (2,381) $ (1,079)