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Investments (Tables) | 12 Months Ended
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Dec. 31, 2014
Investments Schedule [Abstract] |
Summary of Investments | The Company’s investments, excluding the assets of consolidated sponsored investment products, discussed in Note 19, are as follows:
|  | December 31, |
|  | 2014 |  |  | 2013 |
($ in thousands) |  |  |  |  |  |
Marketable securities |  | $ | 50,251 |  |  | $ | 28,968 |
Equity method investments |  |  | 7,209 |  |  |  | 4,070 |
Nonqualified retirement plan assets |  |  | 5,063 |  |  |  | 4,220 |
Other investments |  |  | 925 |  |  |  | — |
Total investments |  | $ | 63,448 |  |  | $ | 37,258 |
Schedule of Marketable Securities | The Company’s marketable securities consist of both trading (including securities held by a broker-dealer affiliate) and available-for-sale securities. The composition of the Company’s marketable securities is summarized as follows:
December 31, 2014 |
|  | Cost |  |  | Unrealized Loss |  |  | Unrealized Gain |  |  | Fair Value |
($ in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Trading: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sponsored funds |  | $ | 39,079 |  |  | $ | (1,190 | ) |  | $ | 423 |  |  | $ | 38,312 |
Equity securities |  |  | 8,421 |  |  |  | — |  |  |  | 319 |  |  |  | 8,740 |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sponsored closed-end funds |  |  | 3,129 |  |  |  | (163 | ) |  |  | 233 |  |  |  | 3,199 |
Total marketable securities |  | $ | 50,629 |  |  | $ | (1,353 | ) |  | $ | 975 |  |  | $ | 50,251 |
December 31, 2013 |
|  | Cost |  |  | Unrealized Loss |  |  | Unrealized Gain |  |  | Fair Value |
($ in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Trading: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sponsored funds |  | $ | 16,079 |  |  | $ | (704 | ) |  | $ | 2,529 |  |  | $ | 17,904 |
Equity securities |  |  | 7,043 |  |  |  | — |  |  |  | 1,336 |  |  |  | 8,379 |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sponsored closed-end funds |  |  | 2,815 |  |  |  | (145 | ) |  |  | 15 |  |  |  | 2,685 |
Total marketable securities |  | $ | 25,937 |  |  | $ | (849 | ) |  | $ | 3,880 |  |  | $ | 28,968 |

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