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Investments in Marketable Securities
 9 Months Ended
Sep. 30, 2020
Marketable Securities [Abstract]  
Investments in Marketable Securities Investments in Marketable SecuritiesThe following is a summary of the cost, gross unrealized gains, gross unrealized losses and fair value of Investments in marketable securities:
 December 31,
2019		September 30,
2020
Cost$57.9 $67.5 
Unrealized gains2.1 2.4 
Unrealized losses(0.6)(1.7)
Fair value$59.4 $68.2 
The Company recorded proceeds of $2.9 million and $21.4 million for the three and nine months ended September 30, 2019, respectively, and $16.7 million and $80.8 million for the three and nine months ended September 30, 2020, respectively, from the sale of investments in marketable securities. No significant gains or losses were recorded for the three and nine months ended September 30, 2019 and 2020.
As of December 31, 2019 and September 30, 2020, Investments in marketable securities includes consolidated Affiliate sponsored investment products with fair values of $38.1 million and $43.4 million, respectively.