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COMMITMENTS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Future minimum lease payments and rentals under operating leases [Abstract]      
2018 $ 31,643    
2019 28,862    
2020 26,264    
2021 21,074    
2022 14,428    
Subsequent to 2022 31,203    
Total minimum lease payments 153,474    
Net rental expense applicable to operating leases [Abstract]      
Rent expense under operating lease $ 30,558 $ 29,571 $ 29,975
Minimum [Member]      
Operating Leased Assets [Line Items]      
Initial lease term 5 years    
Renewal of lease term 1 year    
Maximum [Member]      
Operating Leased Assets [Line Items]      
Initial lease term 30 years    
Renewal of lease term 25 years    
Property [Member]      
Net rental expense applicable to operating leases [Abstract]      
Minimum $ 27,543 26,594 27,211
Additional rentals based on sales 21 4 27
Sublease income (90) (58) (206)
Rent expense under operating lease 27,474 26,540 27,032
Equipment [Member]      
Net rental expense applicable to operating leases [Abstract]      
Rent expense under operating lease $ 3,084 $ 3,031 $ 2,943