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COMMITMENTS AND CONTINGENCIES - SCHEDULE OF FUTURE MINIMUM RENTAL PAYMENTS (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Operating Leases, Future Minimum Payments Due [Abstract]  
2013 $ 65,510
2014 55,378
2015 44,036
2016 33,498
2017 23,904
Thereafter $ 49,150