LEASES (Schedule of Lease Assets and Liabilities, Weighted-Average Lease Term and Discount Rate) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
LEASES [Abstract]
Operating lease ROU assets	$ 530,760	$ 482,513	$ 472,003
Accumulated amortization	(65,995)	(59,385)	(45,385)
Total lease assets	$ 464,765	423,128	426,618
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Total lease assets
Finance lease assets	$ 11,061	7,796	6,223
Accumulated amortization	(2,970)	(1,640)	(737)
Finance leases, net	$ 8,091	6,156	5,486
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property Plant And Equipment Net
Total lease assets	$ 472,856	429,284	432,104
Current operating lease liabilities	$ 36,694	36,969	32,645
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other Liabilities Current
Current finance lease liabilities	$ 2,815	2,047	1,695
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other Liabilities Current
Noncurrent operating lease liabilities	$ 443,128	399,582	405,578
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Noncurrent operating lease liabilities
Noncurrent finance lease liabilities	$ 5,325	4,139	3,807
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities Noncurrent
Total lease liabilities	$ 487,962	$ 442,737	$ 443,725
Weighted-average remaining lease term, Operating leases	9 years 1 month 6 days	9 years 6 months	10 years 4 months 24 days
Weighted-average remaining lease term, Finance leases	3 years 9 months 18 days	4 years 2 months 12 days	4 years 4 months 24 days
Weighted-average discount rate, Operating leases	3.30%	3.60%	4.10%
Weighted-average discount rate, Finance leases	1.30%	1.40%	1.50%