LEASES - Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating lease expense, net	$ 14,948	$ 30,226
Amortization of assets	1,630	3,192
Interest on lease liabilities	388	746
Total finance lease expense	2,018	3,938
Lease expense	$ 16,966	$ 34,164