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Goodwill and Intangible Assets (Intangible Assets Subject to Amortization) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]    
Historical Cost $ 1,403,397 $ 1,391,293
Accumulated Amortization 858,751 818,568
Net $ 544,646 $ 572,725
Minimum    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average   Amortization Period 1 year  
Maximum    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average   Amortization Period 20 years  
Trade names    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average   Amortization Period 10 years 9 years 8 months 12 days
Historical Cost $ 252,358 $ 250,418
Accumulated Amortization 108,274 102,657
Net $ 144,084 $ 147,761
Customer Relationships    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average   Amortization Period 8 years 1 month 6 days 8 years 1 month 6 days
Historical Cost $ 681,981 $ 673,847
Accumulated Amortization 421,404 398,396
Net $ 260,577 $ 275,451
Customer Relationships | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average   Amortization Period   4 years
Customer Relationships | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average   Amortization Period   5 years
Other purchased intangibles    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average   Amortization Period 9 years 1 month 6 days 9 years 3 months 18 days
Historical Cost $ 469,058 $ 467,028
Accumulated Amortization 329,073 317,515
Net $ 139,985 $ 149,513