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Fair Value Measurements (Fair Value Of Certain Financial Assets And Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity available-for-sale securities	$ 10,560	$ 10,657
Fixed income available-for-sale securities	67,796	70,637
Fixed income securities owned	21,264	21,235
Investment funds sponsored by LSV	4,183	4,039
Assets, fair value	103,803	106,568
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity available-for-sale securities	10,560	10,657
Fixed income available-for-sale securities	0	0
Fixed income securities owned	0	0
Assets, fair value	10,560	10,657
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity available-for-sale securities	0	0
Fixed income available-for-sale securities	67,796	70,637
Fixed income securities owned	21,264	21,235
Assets, fair value	$ 89,060	$ 91,872

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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The fair value as of the balance sheet date of firm holdings in debt obligations issued by the US government including short-term Treasury bills, medium-term Treasury notes, and long-term Treasury bonds, as well as debt issued by agencies. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings.

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Amount of debt and equity financial instruments classified as other and noncurrent.

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