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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
Investment fair value $ 322.4 $ 321.4
Investments in unconsolidated Funds    
Investment fair value $ 197.8 $ 196.6
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, issued (in shares) 88,776,731 105,160,021
Consolidated Funds    
Investment fair value $ 124.6 $ 124.8