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LONG-TERM DEBT (Details) - USD ($)
$ in Thousands
6 Months Ended
Aug. 15, 2016
Jun. 30, 2016
Dec. 31, 2015
Borrowings [Abstract]      
Long-term debt   $ 347,132 $ 349,509
Less unamortized debt issuance costs   (602) (2,046)
Less: Current portion   (112,091) (50,829)
Long-term debt less current maturities   235,041 298,680
Line of Credit [Member]      
Borrowings [Abstract]      
Long-term debt   193,738 172,147
Term Loan [Member]      
Borrowings [Abstract]      
Long-term debt   150,000 175,000
Promissory Note Payable [Member]      
Borrowings [Abstract]      
Long-term debt   $ 3,996 $ 4,408
Interest rate   2.90% 2.90%
Wells Fargo Bank, National Association [Member] | Subsequent Event [Member]      
Borrowings [Abstract]      
Asset sales without the consent of the required lenders $ 3,500    
Minimum asset coverage ratio 0.95    
Wells Fargo Bank, National Association [Member] | Line of Credit [Member] | Subsequent Event [Member]      
Borrowings [Abstract]      
Reduction amount in principal term loan, current fiscal year $ 17,000    
Reduction amount in principal term loan, next fiscal year 14,000    
Additional mandatory prepayments, current fiscal year 30,000    
Additional mandatory prepayments, next fiscal year 25,000    
Wells Fargo Bank, National Association [Member] | Term Loan [Member]      
Borrowings [Abstract]      
Amount outstanding   $ 150,000  
Wells Fargo Bank, National Association [Member] | Term Loan [Member] | Subsequent Event [Member]      
Borrowings [Abstract]      
Maximum borrowing capacity 150,000    
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member]      
Borrowings [Abstract]      
Maximum borrowing capacity   $ 250,000  
Expiration date   Mar. 31, 2018  
Debt amortization expenses payable per quarter current year   $ 12,500  
Debt amortization expenses payable per quarter in year two and thereafter   15,625  
Maximum borrowing capacity for next fiscal year 190,000    
Amount outstanding   $ 343,700  
Weighted average interest rate   3.72%  
Available for borrowing under the facility   $ 10,100  
Commitment fee   0.50%  
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]      
Borrowings [Abstract]      
Maximum borrowing capacity $ 205,000    
Expiration date Mar. 31, 2018    
Maximum borrowing capacity for next fiscal year $ 190,000    
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member] | LIBOR [Member]      
Borrowings [Abstract]      
Base rate   LIBOR  
Basis spread on base rate   3.25%  
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member] | LIBOR [Member] | Subsequent Event [Member]      
Borrowings [Abstract]      
Basis spread on base rate 5.00%    
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member] | Prime rate [Member]      
Borrowings [Abstract]      
Basis spread on base rate   2.25%  
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member] | Prime rate [Member] | Subsequent Event [Member]      
Borrowings [Abstract]      
Basis spread on base rate 4.00%    
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member] | LIBOR Rate & CDOR Rate [Member] | Subsequent Event [Member]      
Borrowings [Abstract]      
Basis spread on base rate 5.00%    
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member] | Base Rate & Canadian Base Rate [Member] | Subsequent Event [Member]      
Borrowings [Abstract]      
Basis spread on base rate 4.00%    
Wells Fargo Bank, National Association [Member] | Permitted Overadvance Facility [Member] | Subsequent Event [Member]      
Borrowings [Abstract]      
Percentage of net accounts receivable 85.00%    
Percentage of net inventory 65.00%    
Wells Fargo Bank, National Association [Member] | Permitted Overadvance Facility [Member] | LIBOR Rate & CDOR Rate [Member] | Subsequent Event [Member]      
Borrowings [Abstract]      
Basis spread on base rate 6.00%    
Wells Fargo Bank, National Association [Member] | Permitted Overadvance Facility [Member] | Base Rate & Canadian Base Rate [Member] | Subsequent Event [Member]      
Borrowings [Abstract]      
Basis spread on base rate 5.00%