LEASES - Lease Costs Included in the Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 2,604	$ 2,124
Operating cash flows from finance leases	19	35
Principal payments under finance lease obligations	$ 162	$ 152