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Investment In Unconsolidated Affiliates (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended |  |  | 6 Months Ended |  |
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 LSV Employee Group II [Member] | Jun. 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] | Jul. 22, 2014 Financial Guarantee [Member] L S V Asset Management [Member] Subsequent Event [Member] | Apr. 30, 2011 Financial Guarantee [Member] LSV Employee Group II [Member] | Oct. 31, 2012 Financial Guarantee [Member] LSV Employee Group III [Member] | Jul. 22, 2014 Financial Guarantee [Member] LSV Employee Group III [Member] Subsequent Event [Member] | Jun. 30, 2014 L S V Asset Management [Member] | Jun. 30, 2013 L S V Asset Management [Member] | Jun. 30, 2014 L S V Asset Management [Member] | Jun. 30, 2013 L S V Asset Management [Member] | Dec. 31, 2013 L S V Asset Management [Member] | Dec. 31, 2012 L S V Asset Management [Member] | Jun. 30, 2014 Gao Fu [Member] | Jun. 30, 2013 Gao Fu [Member] | Dec. 31, 2013 Gao Fu [Member] | Jun. 30, 2014 Maximum [Member]
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 39.30% |  | 39.30% |  | 39.80% |  |  |  | 50.00%
Total investment in equity method investee |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 47,841 |  | $ 47,841 |  | $ 50,595 |  | $ 12,176 |  | $ 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 |  |  | 69,470 | 53,797 |  |  |  |  |  |  |  |  |  |  |  | 69,470 | 53,797 |  |  |  |  |  |
Company's share in the earnings of equity method investee | 34,226 | 27,588 | 66,117 | 55,176 |  |  |  |  |  |  |  |  |  | 34,500 | 27,780 | 66,716 | 55,586 |  |  | (599) | (410) |  |
Purchase price paid for partnership interest in LSV |  |  |  |  |  |  | 4,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of guarantor's obligation, maximum exposure |  |  |  |  |  |  |  |  | 24,930 | 1,443 | 3,655 | 45,000 | 45,000 |  |  |  |  |  |  |  |  |  |
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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- Definition Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Article 5 + Details
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- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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- Definition 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). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)(2)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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