Investments - Summary of Investments (Details) - USD ($)		Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Equity Investments, at Fair Value		$ 46,785,000	$ 90,219,000
Total Trading Securities, at Fair Value		20,642,000	0
Investments in Equity Method Investees		13,335,000	5,287,000
Total	[1]	80,762,000	95,506,000
Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Equity Investments, at Fair Value		46,785,000	82,900,000
Mutual Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Equity Investments, at Fair Value		0	7,319,000
Leveraged Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Trading Securities, at Fair Value		19,635,000	0
Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Trading Securities, at Fair Value		$ 1,007,000	$ 0

[1] Asset and liability amounts in parentheses represent the aggregated balances at June 30, 2022 and December 31, 2021 attributable to Pzena U.S. Best Ideas (GP), LLC and Pzena Global Best Ideas (GP), LLC, which were variable interest entities as of June 30, 2022 and December 31, 2021. Asset and liability amounts in parentheses at June 30, 2022 are also attributable to Pzena 320 Fund (GP), LLC. Asset and liability amounts in parentheses at December 31, 2021 are also attributable to Pzena Global Focus Value Fund.