LEASES (Schedule of Lease Assets and Liabilities, Weighted-Average Lease Term and Discount Rate) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
LEASES [Abstract]
Operating lease ROU assets	$ 472,003	$ 441,656	$ 435,672
Accumulated amortization	(45,385)	(33,467)	(16,776)
Total lease assets	426,618	408,189	418,896
Current obligations under leases	32,645	29,971	31,357
Noncurrent operating liabilities	405,578	388,042	396,952
Total lease liabilities	$ 438,223	$ 418,013	$ 428,309
Weighted-average remaining lease term, Operating leases	10 years 4 months 24 days	9 years 10 months 24 days	10 years
Weighted-average discount rate, Operating leases	4.10%	4.30%	4.40%