LEASES (Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used for operating leases	$ 70,012	$ 59,952
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	50,949	107,822
Non-cash net increase due to lease modifications:
Operating lease right-of-use assets	7,876	10,124
Operating lease liabilities	$ 7,861	$ 10,192