INTANGIBLE ASSETS - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 187,452	$ 189,341
Accumulated Amortization	(121,636)	(113,934)
Net Carrying Amount	65,816	75,407
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	164,221	165,231
Accumulated Amortization	(99,511)	(91,296)
Net Carrying Amount	64,710	73,935
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	20,248	20,563
Accumulated Amortization	(19,698)	(19,830)
Net Carrying Amount	550	733
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,300	2,707
Accumulated Amortization	(1,744)	(1,978)
Net Carrying Amount	556	729
Licenses
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	683	840
Accumulated Amortization	(683)	(830)
Net Carrying Amount	$ 0	$ 10