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Consolidated Statements of Financial Condition (Parenthetical)
Dec. 31, 2019
$ / shares
shares
Common stock, par value (in dollars per share) | $ / shares $ 0.01
Outstanding 77,801,854
Class A Common Stock  
Authorized 500,000,000
Outstanding 56,429,825
Class B Common Stock  
Authorized 200,000,000
Outstanding 7,803,364
Class C Common Stock  
Authorized 400,000,000
Outstanding 13,568,665