LEASES (Schedule of Lease Assets and Liabilities, Weighted-Average Lease Term and Discount Rate) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
LEASES [Abstract]
Operating lease ROU assets	$ 482,513	$ 441,656
Accumulated amortization	(59,385)	(33,467)
Finance lease assets	7,796	1,226
Accumulated amortization	(1,640)	(65)
Total lease assets	429,284	409,350
Current operating lease liabilities	36,969	29,971
Current finance lease liabilities	2,047	430
Noncurrent operating liabilities	399,582	388,042
Noncurrent finance lease liabilities	4,139	733
Total lease liabilities	$ 442,737	$ 419,176
Weighted-average remaining lease term, Operating leases	9 years 6 months	9 years 10 months 24 days
Weighted-average remaining lease term, Finance leases	4 years 2 months 12 days	2 years 9 months 18 days
Weighted-average discount rate, Operating leases	3.60%	4.30%
Weighted-average discount rate, Finance leases	1.40%	3.00%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other Liabilities Current	Other Liabilities Current