LEASES (Components of Operating Lease Expense) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
LEASES [Abstract]
Operating lease cost		$ 14,106	$ 14,127
Short-term lease cost	[1]	9,385	8,700
Variable lease cost		3,132	3,068
Sublease income		(734)	(610)
Total lease cost		$ 25,889	$ 25,285

[1] Our short-term lease cost includes the cost of leases with an initial term of one month or less.