LEASES - Other Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities			$ 3,654	$ 3,685
Right-of-use assets acquired under operating lease			631	873
Operating lease expense	$ 1,407	$ 1,698	2,930	3,392
Short-term lease expense	1,451	1,949	3,296	4,108
Variable and other lease costs	$ 482	$ 659	$ 1,056	$ 1,377