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Investments (Tables) | 12 Months Ended
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Dec. 31, 2018
Investments Schedule [Abstract] |
Summary of Investments | The Company’s investments, excluding the assets of consolidated investment products discussed in Note 19, at December 31, 2018 and 2017 were as follows:
| December 31,
($ in thousands) | 2018 |  | 2017
Investment securities - fair value | $ | 59,271 |  |  | $ | 69,101 |
Investment securities - available for sale | 2,023 |  |  | 20,662 |
Equity method investments | 10,573 |  |  | 11,098 |
Nonqualified retirement plan assets | 6,716 |  |  | 6,706 |
Other investments | 975 |  |  | 925 |
Total investments | $ | 79,558 |  |  | $ | 108,492 |
Schedule of Marketable Securities | The composition of the Company’s investment securities - fair value is summarized as follows:
December 31, 2018 |  |  |
($ in thousands) | Cost |  | Fair Value
Investment Securities - Equity: |  |  |
Sponsored funds | $ | 43,507 |  |  | $ | 40,191 |
Equity securities | 16,380 |  |  | 16,981 |
Trading debt securities | 3,816 |  |  | 2,099 |
Total investment securities - equity | $ | 63,703 |  |  | $ | 59,271 |
December 31, 2017 |
($ in thousands) | Cost |  | Fair Value
Investment Securities - Equity: |  |  |
Sponsored funds | $ | 50,845 |  |  | $ | 50,614 |
Equity securities | 13,141 |  |  | 15,810 |
Trading debt securities | 3,816 |  |  | 2,677 |
Total investment securities - equity | $ | 67,802 |  |  | $ | 69,101 |
Debt Securities, Available-for-sale | The composition of the Company’s investment securities - available for sale is summarized as follows:
December 31, 2018 |  |  |  |  |  |  |
($ in thousands) | Cost |  | Unrealized Loss |  | Unrealized Gain |  | Fair Value
Investments in CLOs | $ | 3,696 |  |  | $ | (1,673 | ) |  | $ | — |  |  | $ | 2,023 |
December 31, 2017 |  |  |  |  |  |  |
($ in thousands) | Cost |  | Unrealized Loss |  | Unrealized Gain |  | Fair Value
Investments in CLOs | $ | 21,240 |  |  | $ | (630 | ) |  | $ | 52 |  |  | $ | 20,662 |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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