LEASES - Other Lease Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Weighted-average remaining lease term (years)
Operating leases	8 years 4 months 2 days		8 years 9 months 21 days
Finance leases	2 years 7 months 24 days		3 years
Weighted-average discount rate
Operating leases	8.90%		8.90%
Finance leases	6.10%		6.10%
Operating cash flows for operating leases	$ 25,347	$ 29,033
Operating cash flows for finance leases	19	26
Financing cash flows for finance leases	113	250
Acquisition of operating leases though adoption of ASC 842	$ 0	$ 389,403