RESTRUCTURING CHARGES - Restructuring charges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 1,272	$ 4,216	$ 12,204	$ 6,118
Restructuring Incurred Cost Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag			Total restructuring charges	Total restructuring charges
Costs to exit duplicative and loss-making contracts
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	886	0	$ 8,925	$ 0
Workforce reduction
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	343	3,649	2,908	5,300
Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 43	$ 567	$ 371	$ 818