LEASES - Other Information Related to Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Right-of-use assets, operating leases	$ 62,537				$ 28,500
Right-of-use assets, finance leases	141,323	$ 226,423	$ 231,123	$ 238,119
Lease liabilities, operating leases	81,542				$ 31,000
Total lease liabilities	$ 175,021
Weighted-average remaining lease term (years), operating leases	7 years 5 months 5 days
Weighted-average remaining lease term (years), finance leases	19 years 4 days
Weighted-average discount rate, operating leases	12.40%
Weighted-average discount rate, finance leases	15.70%
Cash Flow, Lessee [Abstract]
Operating cash paid to settle operating lease liabilities	$ 8,748
Right-of-use assets obtained in exchange for lease liabilities	40,042
Operating cash paid for interest	23,730
Right-of-use assets obtained in exchange for lease liabilities	$ 49