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Investments in Marketable Securities | 3 Months Ended
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Mar. 31, 2020
Marketable Securities [Abstract] |
Investments in Marketable Securities | Investments in Marketable Securities The following is a summary of the cost, gross unrealized gains, gross unrealized losses and fair value of Investments in marketable securities:
| December 31, 2019 |  | March 31, 2020
Cost | $ | 57.9 |  |  | $ | 61.6 |
Unrealized gains | 2.1 |  |  | 0.4 |
Unrealized losses | (0.6 | ) |  | (7.4 | )
Fair value | $ | 59.4 |  |  | $ | 54.6 |
For the three months ended March 31, 2019 and 2020, the Company received proceeds of $15.1 million and $26.2 million, respectively, from the sale of investments in marketable securities and recorded net gains (losses) of $0.5 million and $(1.0) million, respectively. As of December 31, 2019 and March 31, 2020, Investments in marketable securities includes consolidated Affiliate sponsored investment products with fair values of $38.1 million and $33.2 million, respectively.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 + Details
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