LEASE (FUTURE MINIMUM LEASE PAYMENTS TABLE) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Finance Leases - Year 1	$ 6,237	$ 7,594
Finance Leases - Year 2	2,740	5,587
Finance Leases - Year 3	1,631	2,139
Finance Leases - Year 4	579	1,109
Finance Leases - Year 5		331
Total minimum lease payments	11,187	16,760
Less: imputed interest	(231)	(394)
Total lease liability	10,956	16,366
Finance Lease, Liability	10,956	16,366
Operating Leases [Member]
Lessee, Lease, Description [Line Items]
Operating Leases - Year 1	51,120	54,903
Operating Leases - Year 2	46,913	47,892
Operating Leases - Year 3	31,085	43,590
Operating Leases - Year 4	17,338	28,124
Operating Leases - Year 5	8,288	14,494
Thereafter	8,397	14,734
Total minimum lease payments	163,141	203,737
Less: Imputed Interest.	(21,213)	(31,124)
Total lease liability	141,928	172,613
Sublease Income [Member]
Lessee, Lease, Description [Line Items]
Sub-lease income - Year 1	(3,500)	(2,976)
Sub-lease income - Year 2	(3,489)	(621)
Sub-lease income - Year 3	(3,123)	(345)
Sub-lease income - Year 4	(2,905)	(201)
Sub-lease income - Year 5	(2,940)
Sub-lease income - thereafter	(490)
Sublease Income Total	(16,447)	(4,143)
Sublease Income Total	$ 16,447	$ 4,143