Annual report pursuant to Section 13 and 15(d)

COMMITMENTS AND CONTINGENCIES (Details)

v3.8.0.1
COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]      
Expenses incurred under operating leases $ 7,400 $ 6,600 $ 6,300
Aggregate commitments under non-cancelable operating leases      
2018 5,918    
2019 3,210    
2020 2,604    
2021 2,139    
2022 2,042    
Thereafter 12,148    
Total $ 28,061