LEASES - Summary of Lease Expense and Weighted Average (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 1,263
Short-term lease cost	39
Total lease cost	$ 1,302
Weighted average remaining lease term	3 years 6 months 10 days
Weighted average discount rate	5.10%