Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND INTANGIBLE ASSETS - Narrative (Details)

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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]        
Goodwill $ 730,139   $ 721,819 $ 653,176
Intangible assets, net 438,416   446,584  
Finite-Lived Intangible Assets, Net 332,790   341,673  
Amortization expense 15,100 $ 13,100    
Customer Contracts        
Finite-Lived Intangible Assets [Line Items]        
Finite-Lived Intangible Assets, Net 318,806   325,929  
Other Intangible Assets        
Finite-Lived Intangible Assets [Line Items]        
Finite-Lived Intangible Assets, Net 421   463  
International        
Finite-Lived Intangible Assets [Line Items]        
Goodwill 83,300   82,100  
International | Trademarks & Tradenames        
Finite-Lived Intangible Assets [Line Items]        
Intangible assets, net 2,800   2,900  
International | Customer Contracts        
Finite-Lived Intangible Assets [Line Items]        
Goodwill 40,900   42,100  
International | Other Intangible Assets        
Finite-Lived Intangible Assets [Line Items]        
Intangible assets, net $ 600   $ 700