LEASES - Lease Costs Included in the Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 3,660	$ 3,820
Operating cash flows from finance leases	12	27
Financing cash flows from finance leases	$ 259	$ 244