LEASE COST (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Lease Cost Table Line Items
Total lease cost	$ 52,100	$ 49,508	$ 59,243
Depreciation and Amortization
Lease Cost Table Line Items
Amortization of ROU assets - finance leases	2,832	3,785	6,674
Interest Expense
Lease Cost Table Line Items
Interest on lease liabilities - finance leases	115	79	136
Cost of Services
Lease Cost Table Line Items
Operating lease cost (cost resulting from lease payments)	36,872	34,786	39,087
Short-term Lease, Cost	1,182	3,428	4,529
Variable Lease, Cost	827	1,320	1,246
Selling General And Administrative Expenses [Member]
Lease Cost Table Line Items
Operating lease cost (cost resulting from lease payments)	1,625	2,524	2,770
Sublease Income	(555)	(710)	(807)
Restructuring
Lease Cost Table Line Items
Operating lease cost (cost resulting from lease payments)	788	925	1,614
Impairment
Lease Cost Table Line Items
Operating lease cost (cost resulting from lease payments)	10,096	4,821	5,338
Other income (expense), net
Lease Cost Table Line Items
Operating lease cost (cost resulting from lease payments)	1,352	1,298	1,240
Sublease Income	$ (3,034)	$ (2,748)	$ (2,584)