LEASES (Maturity Analysis on an Undiscounted Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2021	$ 54,733
2022	48,225
2023	41,206
2024	36,141
2025	36,375
Thereafter	565,042
Total minimum lease payments	781,722
Less: Lease payments representing interest	345,171
Present value of future minimum lease payments	436,551
Less: Current obligations under leases	36,969	$ 29,971
Long-term lease obligations	399,582	388,042
Finance Lease, Liability, Payment, Due [Abstract]
2021	2,134
2022	1,986
2023	1,058
2024	779
2025	349
Thereafter	50
Total minimum lease payments	6,356
Less: Lease payments representing interest	170
Present value of future minimum lease payments	6,186
Less: Current obligations under leases	2,047	430
Long-term lease obligations	$ 4,139	$ 733