LEASE COMMITMENTS - Supplemental Cash Flow Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 6,469
Operating cash flows from finance leases	243
Financing cash flows from finance leases	1,140
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	4,515
Finance leases	$ 10,697