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LEASES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
LEASES [Abstract]      
Rental expense $ 5,800 $ 5,400 $ 5,300
Future minimum rental commitments [Abstract]      
2017 6,078    
2018 5,574    
2019 5,040    
2020 3,857    
2021 3,098    
Thereafter 7,297    
Total $ 30,944