LEASES - SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 3,187	$ 2,705	$ 9,599	$ 7,071
Operating cash flows from finance leases	1	0	3	0
Financing cash flows from finance leases	31	0	71	0
Right-of-use assets obtained in exchange for new operating lease obligations	918	2,811	8,306	12,892
Right-of-use assets obtained in exchange for new finance lease obligations	$ 0	$ 0	$ 219	$ 0