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GOODWILL AND OTHER INTANGIBLE ASSETS - Additional information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Oct. 18, 2022
Goodwill [Line Items]            
Goodwill $ 497,388   $ 497,388   $ 512,595  
Other     422      
Amortization expense 10,228 $ 9,390 30,804 $ 23,146    
Estimated future amortization expense remainder of fiscal year 9,139   9,139      
Estimated future amortization expense year one 33,142   33,142      
Estimated future amortization expense year two 29,511   29,511      
Estimated future amortization expense year three 26,384   26,384      
Estimated future amortization expense year four 24,018   24,018      
Estimated future amortization expense after year four 59,171   59,171      
Goodwill, fair value disclosure 51,921   51,921      
Tradename, fair value disclosure $ 27,000   $ 27,000      
Fair value measurement, growth rate 3.00%   3.00%      
Fair value measurement, discount rate 18.00%   18.00%      
Fair value measurement, royalty rate 2.00%   2.00%      
Indefinite-Lived Intangible Assets            
Goodwill [Line Items]            
Asset impairment charges $ 8,000          
Goodwill            
Goodwill [Line Items]            
Asset impairment charges 27,500          
Series of Individually Immaterial Business Acquisitions            
Goodwill [Line Items]            
Goodwill 151,253   $ 151,253   151,925  
Working capital adjustments     672      
Targus            
Goodwill [Line Items]            
Goodwill           $ 79,421
Goodwill, period change     3,668      
Operating Segments | Financial Consulting Segment            
Goodwill [Line Items]            
Goodwill $ 33,132   33,132   $ 23,680  
Other     $ 9