LEASES - Components of Lease Expense (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 25,663
Finance lease cost
Amortization of finance leases	27
Interest on finance leases	3
Short-term and variable lease cost	14,218
Net lease cost	$ 39,911