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Investment in Unconsolidated Affiliate (Condensed Balance Sheets Of LSV) (Details) - L S V Asset Management [Member] - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Current assets	$ 128,808	$ 125,872
Non-current assets	1,683	1,927
Total assets	130,491	127,799
Current liabilities	55,427	39,303
Partners’ capital	75,064	88,496
Total liabilities and partners’ capital	$ 130,491	$ 127,799

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