Quarterly report pursuant to Section 13 or 15(d)

Acquisitions and Other Investments - Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details)

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Acquisitions and Other Investments - Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
May 31, 2022
Dec. 31, 2021
Business Acquisition [Line Items]      
Goodwill $ 936,054   $ 925,154
401kplans.com Acquisition      
Business Acquisition [Line Items]      
Tangible assets acquired, net of acquired cash   $ 94  
Identifiable intangible assets   3,000  
Goodwill   11,378  
Total net assets acquired   $ 14,472