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LEASE COMMITMENTS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
LEASE COMMITMENTS [Abstract]      
Operating Leases, Rent Expense $ 10,200 $ 7,600 $ 2,200
Operating Leases, Future Minimum Payments Due [Abstract]      
2015 6,874    
2016 5,824    
2017 3,996    
2018 2,235    
2019 1,451    
Thereafter 1,885    
Total future minimum lease payments 22,265    
Capital Leased Assets, Gross 10,800    
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]      
2015 1,522    
2016 1,015    
2017 526    
2018 115    
2019 88    
Thereafter 5    
Capital Leases, Future Minimum Payments Due 3,271    
Capital Leases, Future Minimum Payments, Interest Included in Payments (71)    
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments $ 3,200