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Accrued Expenses (Tables)
12 Months Ended
Dec. 31, 2013
Accrued Expenses [Abstract]  
Accrued Expenses
  2013 2012
Compensation $ 18,019 $ 17,837
Customer rebates   8,473   9,530
Insurance   8,403   8,136
Other   14,984   11,929
Total accrued expenses $ 49,879 $ 47,432