LEASE COMMITMENTS - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 23,484	$ 21,872
Operating cash flows from finance leases	1,372	1,245
Financing cash flows from finance leases	4,436	4,730
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	24,477	15,226
Finance leases	$ 3,642	$ 15,957