Annual report pursuant to Section 13 and 15(d)

Acquisitions (Schedule Of Assets Acquired and Liabilities Assumed, Portfolio Center Business) (Details)

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Acquisitions (Schedule Of Assets Acquired and Liabilities Assumed, Portfolio Center Business) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Apr. 01, 2019
Business Acquisition [Line Items]        
Goodwill $ 925,154 $ 906,773 $ 879,850  
PortfolioCenter        
Business Acquisition [Line Items]        
Total tangible assets acquired       $ 13
Total liabilities assumed       (1,600)
Identifiable intangible assets       11,700
Goodwill       15,587
Total net assets acquired       $ 25,700