LEASE COMMITMENTS - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Leases
Operating lease right-of-use assets	$ 69,845	$ 72,377	$ 83,222	$ 0
Accounts payable, accrued and other liabilities	18,804	16,578
Operating lease liabilities	52,212	55,276	$ 61,331	$ 0
Total operating lease liabilities	$ 71,016	$ 71,854
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OperatingLeaseLiabilityNoncurrent	us-gaap:OperatingLeaseLiabilityNoncurrent
Finance Leases
Property, plant and equipment, gross	$ 49,760	$ 47,020
Accumulated depreciation	(7,258)	(4,271)
Property, plant and equipment, net	42,502	42,749
Current maturities of long-term obligations, net of unamortized debt issuance cost	4,258	4,318
Long-term obligations, net of unamortized debt issuance cost	25,767	25,634
Total finance lease liabilities	$ 30,025	$ 29,952
Weighted Average Remaining Lease Term (in years)
Operating leases	5 years	6 years 1 month 6 days
Finance leases	7 years 2 months 12 days	7 years
Weighted Average Discount Rate
Operating leases	4.21%	5.05%
Finance leases	4.85%	5.13%