LEASES - Other Lease Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Weighted-average remaining lease term (years)
Operating leases	9 years 9 months 7 days
Finance leases	2 years 7 months 13 days
Weighted-average discount rate
Operating leases	9.90%
Finance leases	6.60%
Operating cash flows from operating leases	$ 14,516
Operating cash flows from finance leases	11
Financing cash flows from finance leases	132
Acquisition of operating leases through adoption of ASC 842	$ 389,403