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Fair Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2013
Fair Value Disclosures [Abstract] |
Changes in Assets and Liabilities Measured at Fair Value on Recurring Basis | The Company’s assets measured at fair value on a recurring basis as of June 30, 2013 and December 31, 2012 by fair value hierarchy level were as follows:
June 30, 2013 |
|  | Level 1 |  |  | Level 2 (a) |  |  | Level 3 |  |  | Total |
($ in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Marketable securities trading: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sponsored mutual funds and variable insurance funds |  | $ | 13,371 |  |  | $ | — |  |  | $ | — |  |  | $ | 13,371 |
Investments of consolidated sponsored investment products |  |  | 13,649 |  |  |  | 29,465 |  |  |  | — |  |  |  | 43,114 |
Equity securities |  |  | 4,649 |  |  |  | — |  |  |  | — |  |  |  | 4,649 |
Marketable securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sponsored closed-end funds |  |  | 2,713 |  |  |  | — |  |  |  | — |  |  |  | 2,713 |
Other assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonqualified retirement plan assets |  |  | 3,366 |  |  |  | — |  |  |  | — |  |  |  | 3,366 |
Total assets measured at fair value |  | $ | 37,748 |  |  | $ | 29,465 |  |  | $ | — |  |  | $ | 67,213 |
December 31, 2012 |
|  | Level 1 |  |  | Level 2 (a) |  |  | Level 3 |  |  | Total |
($ in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Marketable securities trading: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sponsored mutual funds and variable insurance funds |  | $ | 8,013 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,013 |
Investments of consolidated sponsored investment products |  |  | 10,092 |  |  |  | 33,135 |  |  |  | — |  |  |  | 43,227 |
Equity securities |  |  | 4,379 |  |  |  | — |  |  |  | — |  |  |  | 4,379 |
Marketable securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sponsored closed-end funds |  |  | 2,656 |  |  |  | — |  |  |  | — |  |  |  | 2,656 |
Other assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonqualified retirement plan assets |  |  | 2,970 |  |  |  | — |  |  |  | — |  |  |  | 2,970 |
Total assets measured at fair value |  | $ | 28,110 |  |  | $ | 33,135 |  |  | $ | — |  |  | $ | 61,245 |
a) | Debt securities are valued based on evaluated quotations received from independent pricing services or from dealers who make markets in such securities. For most bond types, the pricing service utilizes matrix pricing, which considers one or more of the following factors: yield or price of bonds of comparable quality, coupon, maturity, current cash flows, type and current day trade information, as well as dealer supplied prices. These valuations are categorized as Level 2.

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19190-110258 + Details
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