LEASES - Other Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 1,845
ROU assets obtained in exchange for new operating lease liabilities	300
Operating lease expense	1,694
Short-term lease expense	2,159
Variable and other lease costs	$ 718