LEASES - Supplemental Lease Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$ 1,996	$ 2,557
Non-cash activity:
Right-of-use assets obtained in exchange for operating lease obligations	$ 0	$ 27,321