LEASES - Other Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities		$ 5,619
Right-of-use assets obtained in exchange for new operating lease liabilities		872
Operating lease expense	$ 1,646	5,038
Short-term lease expense	2,124	6,232
Variable and other lease costs	598	$ 1,975
Right of use impairment charge	$ 1,200