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COMMITMENTS AND CONTINGENCIES (Tables)
12 Months Ended
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases
Future minimum payments under operating lease arrangements as of December 31, 2018 were as follows (in thousands):
Years ending December 31,
 
2019
$
10,705

2020
8,384

2021
7,455

2022
5,691

2023
5,430

Thereafter
19,818

 
$
57,483