LEASES - Other Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Weighted-average remaining lease term (years)
Operating leases	8 years 6 months 26 days		8 years 9 months 22 days
Finance leases	3 years		3 years
Weighted-average discount rate
Operating leases	8.90%		8.90%
Finance leases	6.10%		6.10%
Operating cash flows for operating leases	$ 12,673	$ 12,132
Operating cash flows for finance leases	9	11
Financing cash flows for finance leases	52	132
Acquisition of operating leases though adoption of ASC 842	$ 0	$ 389,403