LEASES - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease costs	$ 7,518	$ 7,858
Variable lease costs	1,493	1,680
Finance lease costs:
Amortization of right-of-use assets	108	88
Interest on lease liabilities	81	81
Total lease costs	$ 9,200	$ 9,707