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Investment In Unconsolidated Affiliates (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended												3 Months Ended				3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Apr. 22, 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. 22, 2014 Financial Guarantee [Member] L S V Asset Management [Member] Subsequent Event [Member]	Apr. 22, 2014 Financial Guarantee [Member] LSV Employee Group II [Member]	Apr. 30, 2011 Financial Guarantee [Member] LSV Employee Group II [Member]	Apr. 22, 2014 Financial Guarantee [Member] LSV Employee Group III [Member]	Oct. 31, 2012 Financial Guarantee [Member] LSV Employee Group III [Member]	Apr. 22, 2014 Financial Guarantee [Member] LSV Employee Group III [Member] Subsequent Event [Member]	Mar. 31, 2014 L S V Asset Management [Member]	Mar. 31, 2013 L S V Asset Management [Member]	Apr. 30, 2013 L S V Asset Management [Member]	Mar. 31, 2012 L S V Asset Management [Member]	Mar. 31, 2014 Gao Fu [Member]	Mar. 31, 2013 Gao Fu [Member]	Mar. 31, 2014 Maximum [Member]
Investments in and Advances to Affiliates [Line Items]
Equity method investment, ownership percentage															39.30%	39.80%			50.00%
Total investment in equity method investee													$ 51,306				$ 10,450
Investment in equity method investee in excess of the underlying equity in net assets													3,062
Distributions received from unconsolidated affiliate	31,505	27,821											31,505	27,821
Company's share in the earnings of equity method investee	31,891	27,588											32,216	27,806			(325)	(218)
Purchase price paid for partnership interest in LSV				4,300
Guarantor Obligations, Maximum Exposure, Undiscounted						24,930	6,374		3,655		45,000	45,000
Unpaid Principal Balance			365
Guarantor Obligations, Current Carrying Value								0		0
Purchase of Partnership Interest Value					77,700
Loans Payable					$ 69,930

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Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.

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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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This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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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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