LEASES AND RIGHT OF USE ASSETS - Maturities of Lease Liabilities (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Finance Leases
2019 (remaining)	$ 4,690
2020	32,539
2021	11,777
2022	11,777
2023	22,635
Thereafter	12,297
Total lease payments	95,715
Less: Imputed interest	(7,636)
Total lease obligations	88,079
Less: Current obligations	(19,469)
Long-term finance lease obligations	68,610
Operating Leases
2019 (remaining)	1,381
2020	6,016
2021	1,680
2022	1,115
2023	789
Thereafter	1,394
Total lease payments	12,375
Less: Imputed interest	(251)
Total operating lease liabilities	12,124
Less: Current obligations	(7,556)
Long-term lease obligations	$ 4,568