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Investment in Unconsolidated Affiliates (Condensed Balance Sheets of LSV) (Details) - LSV Asset Management - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Current assets	$ 144,547	$ 138,083
Non-current assets	5,048	1,165
Total assets	149,595	139,248
Current liabilities	46,828	47,874
Non-current liabilities	5,326	0
Partners’ capital	97,441	91,374
Total liabilities and partners’ capital	$ 149,595	$ 139,248

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