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Investment In Unconsolidated Affiliates (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended							3 Months Ended		9 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014 LSV Employee Group II [Member]	Sep. 30, 2014 LSV Employee Group II [Member]	Apr. 30, 2011 LSV Employee Group II [Member]	Oct. 31, 2012 LSV Employee Group III [Member]	Oct. 31, 2012 Financial Guarantee [Member] L S V Asset Management [Member]	Apr. 30, 2011 Financial Guarantee [Member] LSV Employee Group II [Member]	Oct. 31, 2012 Financial Guarantee [Member] LSV Employee Group III [Member]	Oct. 21, 2014 Financial Guarantee [Member] LSV Employee Group III [Member] Subsequent Event [Member]	Sep. 30, 2014 L S V Asset Management [Member]	Sep. 30, 2013 L S V Asset Management [Member]	Sep. 30, 2014 L S V Asset Management [Member]	Sep. 30, 2013 L S V Asset Management [Member]	Dec. 31, 2013 L S V Asset Management [Member]	Sep. 30, 2014 Gao Fu [Member]	Sep. 30, 2013 Gao Fu [Member]	Dec. 31, 2013 Gao Fu [Member]	Sep. 30, 2014 Maximum [Member]	Dec. 31, 2012 Maximum [Member] L S V Asset Management [Member]	Sep. 30, 2013 Minimum [Member] L S V Asset Management [Member]
Investments in and Advances to Affiliates [Line Items]
Equity method investment, ownership percentage													39.30%		39.30%						50.00%	39.80%	39.30%
Total investment in equity method investee													$ 51,956		$ 51,956		$ 50,595	$ 11,902		$ 10,775
Investment in equity method investee in excess of the underlying equity in net assets													3,062		3,062
Distributions received from unconsolidated affiliate			103,592	109,173											103,592	109,173
Company's share in the earnings of equity method investee	37,963	31,028	104,080	86,204									38,237	31,285	104,953	86,871		(873)	(667)
Purchase price paid for partnership interest in LSV							4,300
Amount of guarantor's obligation, maximum exposure									24,930	3,655	45,000	42,381
Principal payment					365	716
Amount of guarantor's obligation, current carrying value												0
Purchase of partnership interest value								77,700
Amount of purchase price financed through term loans								$ 69,930

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Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

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