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Investments (Tables)
 3 Months Ended
Mar. 31, 2024
Schedule of Investments [Abstract]  
Schedule of Investments The Company's investments, excluding the assets of consolidated investment products ("CIP") discussed in Note 16, at March 31, 2024 and December 31, 2023 were as follows:
(in thousands)March 31,
2024		December 31, 2023
Investment securities - fair value$90,497 $97,304 
Equity method investments (1)23,208 22,710 
Nonqualified retirement plan assets13,743 12,682 
Total investments$127,448 $132,696 
(1)    The Company's equity method investments are valued on a three-month lag based upon the availability of financial information.
Schedule of Marketable Securities The composition of the Company’s investment securities - fair value was as follows:
March 31, 2024December 31, 2023
(in thousands)CostFair ValueCostFair Value
Investment Securities - fair value
Sponsored funds$69,067 $69,514 $80,794 $77,433 
Equity securities16,875 20,983 16,353 19,871 
Total investment securities - fair value$85,942 $90,497 $97,147 $97,304