LEASES (Summary of Total Lease Cost) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases
Operating lease cost	$ 87,219	$ 83,195
Short-term operating lease cost	1,933	1,784
Variable operating lease cost	21,944	20,333
Sublease income	(1,198)	(1,175)
Total lease cost	$ 109,898	$ 104,137