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Acquisitions Of Businesses (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
Company
Dec. 31, 2021
USD ($)
Company
Dec. 31, 2020
USD ($)
Company
Business Acquisition [Line Items]      
Number of businesses acquired | Company 6 8 3
Goodwill ascribed $ 919,151 $ 890,268 $ 851,783
2022Acquisitions      
Business Acquisition [Line Items]      
Purchase price 100,800    
Working capital acquired 7,100    
Other net liabilities acquired 1,100    
Goodwill ascribed 28,900    
Identifiable intangible assets ascribed $ 65,900    
2021 Acquisitions      
Business Acquisition [Line Items]      
Purchase price   131,200  
Working capital acquired   22,900  
Other net liabilities acquired   600  
Goodwill ascribed   38,300  
Identifiable intangible assets ascribed   $ 70,600  
2020 Acquisitions      
Business Acquisition [Line Items]      
Purchase price     50,300
Working capital acquired     3,000
Other net liabilities acquired     3,900
Goodwill ascribed     13,100
Identifiable intangible assets ascribed     $ 38,100