LEASES (Supplemental Balance Sheet Information Related to Leases) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Total	$ 139,315	$ 148,975
Less: imputed interest	(8,779)	(10,998)
Present value of lease liabilities	130,536	137,977
Less: current portion of lease liabilities	(29,878)	(32,648)
Long-term lease liabilities	$ 100,658	$ 105,329
Weighted-average remaining lease term in years	4 years 2 months 12 days	4 years
Weighted-average discount rate	2.80%	3.60%
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Lease and other long-term liabilities	Lease and other long-term liabilities