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Fair Value Measurements | 3 Months Ended
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Mar. 31, 2014
Fair Value Disclosures [Abstract] |
Fair Value Measurements | 5. Fair Value Measurements The Company’s assets and liabilities measured at fair value, excluding the assets and liabilities of consolidated sponsored investment products discussed in Note 10, on a recurring basis as of March 31, 2014 and December 31, 2013 by fair value hierarchy level were as follows: March 31, 2014
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
($ in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 234,181 |  |  | $ | — |  |  | $ | — |  |  | $ | 234,181 |
Marketable securities trading: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sponsored mutual funds and variable insurance funds |  |  | 82,198 |  |  |  | — |  |  |  | — |  |  |  | 82,198 |
Equity securities |  |  | 8,910 |  |  |  | — |  |  |  | — |  |  |  | 8,910 |
Marketable securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sponsored closed-end funds |  |  | 2,841 |  |  |  | — |  |  |  | — |  |  |  | 2,841 |
Other investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonqualified retirement plan assets |  |  | 4,299 |  |  |  | — |  |  |  | — |  |  |  | 4,299 |
Total assets measured at fair value |  | $ | 332,429 |  |  | $ | — |  |  | $ | — |  |  | $ | 332,429 |
December 31, 2013
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
($ in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 270,262 |  |  | $ | — |  |  | $ | — |  |  | $ | 270,262 |
Marketable securities trading: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sponsored mutual funds and variable insurance funds |  |  | 17,904 |  |  |  | — |  |  |  | — |  |  |  | 17,904 |
Equity securities |  |  | 8,379 |  |  |  | — |  |  |  | — |  |  |  | 8,379 |
Marketable securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sponsored closed-end funds |  |  | 2,685 |  |  |  | — |  |  |  | — |  |  |  | 2,685 |
Other investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonqualified retirement plan assets |  |  | 4,220 |  |  |  | — |  |  |  | — |  |  |  | 4,220 |
Total assets measured at fair value |  | $ | 303,450 |  |  | $ | — |  |  | $ | — |  |  | $ | 303,450 |
The following is a discussion of the valuation methodologies used for the Company’s assets measured at fair value. Sponsored mutual funds and variable insurance funds represent investments in open-end mutual funds and variable insurance funds for which the Company acts as the investment manager. The fair value of these securities is determined based on their published net asset values and are categorized as Level 1. Equity securities include securities traded on active markets and are valued at the official closing price (typically last sale or bid) on the exchange on which the securities are primarily traded and are categorized as Level 1. Sponsored closed-end funds represent investments for which the Company acts as adviser and are actively traded on the New York Stock Exchange. The fair value of these securities is determined based on the official closing price and are categorized as Level 1. Nonqualified retirement plan assets represent mutual funds within a nonqualified retirement plan whose fair value is determined based on their published net asset value and are categorized as Level 1. Cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities equal or approximate fair value based on the short-term nature of these instruments. Marketable securities are reflected in the condensed consolidated financial statements at fair value based upon publicly quoted market prices. Transfers into and out of levels are reflected when significant inputs, including market inputs or performance attributes, used for the fair value measurement become observable or unobservable or when the Company determines it has the ability, or no longer has the ability, to redeem, in the near term, certain investments that the Company values using a net asset value, or if the book value of certain equity method investments no longer represents fair value. There were no significant transfers between Level 1 and Level 2 during the three months ended March 31, 2014 or 2013.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13504-108611 + Details
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