LEASES (Schedule of Lease Assets and Liabilities, Weighted-Average Lease Term and Discount Rate) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
LEASES [Abstract]
Operating lease ROU assets	$ 461,712	$ 441,656	$ 434,970
Accumulated amortization	(40,782)	(33,467)	(8,589)
Total lease assets	420,930	408,189	426,381
Current obligations under leases	32,045	29,971	31,255
Noncurrent operating liabilities	399,489	388,042	403,426
Total lease liabilities	$ 431,534	$ 418,013	$ 434,681
Weighted-average remaining lease term, Operating leases	10 years 1 month 6 days	9 years 10 months 24 days	10 years 3 months 18 days
Weighted-average discount rate, Operating leases	4.20%	4.30%	4.40%