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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 127,524 $ 126,983
Accumulated Amortization 98,120 90,533
Net Carrying Amount 29,404 36,450
Intangible assets, gross carrying amount 132,624 132,083
Intangible assets, Net Carrying Amount 34,504 41,550
Trademarks    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount, non-amortizing intangible assets 5,100 5,100
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 112,818 111,556
Accumulated Amortization 91,069 85,180
Net Carrying Amount 21,749 26,376
Trademarks    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 11,245 11,809
Accumulated Amortization 4,292 2,768
Net Carrying Amount 6,953 9,041
Acquired software and other    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 3,461 3,618
Accumulated Amortization 2,759 2,585
Net Carrying Amount $ 702 $ 1,033