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LEASES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Total future minimum lease payments for noncancelable operating leases      
2017 $ 12,267    
2018 9,824    
2019 7,670    
2020 5,220    
2021 3,816    
Thereafter 4,888    
Rental expense $ 16,897 $ 16,703 $ 18,103