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Acquisitions Of Businesses (Details) $ in Thousands | 12 Months Ended
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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

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