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Business Combinations Narrative (Details) (New Affiliates [Member], USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 affiliate
Business Acquisition [Line Items] |  |
Number of businesses acquired |  | 2
Tax deduction period for goodwill and client relationships amortization expense |  | 15 years
Maximum contingent payments to be made |  | $ 75,000,000.0
Contingencies amount to be recognized after period of acquisition, minimum |  | 3 years
Contingencies amount to be recognized after period of acquisition, maximum |  | 5 years
New affiliate investments contributed revenue | 227,900,000 | 88,000,000
New affiliate investments contributed earnings | $ 32,100,000 | $ 14,500,000
Mutual Fund [Member] |  |
Business Acquisition [Line Items] |  |
Goodwill percentage attributable to segments |  | 67.00%
High Net Worth [Member] |  |
Business Acquisition [Line Items] |  |
Goodwill percentage attributable to segments |  | 32.90%
Institutional [Member] |  |
Business Acquisition [Line Items] |  |
Goodwill percentage attributable to segments |  | 0.10%

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- Definition Tax deduction period for goodwill and client relationships amortization expense. + References No definition available. + Details
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- Definition Represents the maximum amount of payments to be made by the Company for potential payments under the contingent consideration arrangement including cash and shares. + References No definition available. + Details
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- Definition Percentage of goodwill, attributable to business segment, arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed. + References No definition available. + Details
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- Definition Represents the maximum period in which amount, measured at acquisition-date fair value, of all liabilities assumed that arise from contingencies and will be recognized by the entity. + References No definition available. + Details
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- Definition Represents the minimum period in which amount, measured at acquisition-date fair value, of all liabilities assumed that arise from contingencies and will be recognized by the entity. + References No definition available. + Details
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- Details
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- Definition This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition The number of businesses acquired by the entity during the period. + References No definition available. + Details
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