LEASES (Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used for operating leases	$ 17,645	$ 16,891
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	38	31,252
Non-cash net (decrease)/ increase due to lease modifications:
Operating lease right-of-use assets	(1,066)	4,584
Operating lease liabilities	$ (1,066)	$ 4,573