LEASES LEASES - Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease right-of-use asset	$ 134,286	$ 0
Current operating lease liability	24,199
Long-term operating lease liability	116,652	$ 0
Total operating lease liabilities	140,851
Property, plant and equipment	15,561
Accumulated depreciation	(5,273)
Property, plant and equipment, net	10,288
Current finance lease liability	790
Long-term finance lease liability	11,211
Total finance lease liabilities	$ 12,001
Operating Lease, Weighted Average Remaining Lease Term	7 years 10 months 24 days
Finance Lease, Weighted Average Remaining Lease Term	9 years 10 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	3.82%
Finance Lease, Weighted Average Discount Rate, Percent	4.05%