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Condensed Consolidated Statements of Financial Condition (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Accumulated depreciation $ 373,232 $ 375,656
Intangibles accumulated amortization 130,246 123,409
Fair value of other assets $ 100,811 $ 98,364
Treasury stock shares 1,175,007 616,923
Class A    
Common stock, par value (in dollars per share) $ 0.00001 $ 0.00001
Common stock shares authorized 1,000,000,000 1,000,000,000
Common stock shares issued 92,687,589 90,415,532
Common stock shares outstanding 91,512,582 89,798,609
Class B    
Common stock, par value (in dollars per share) $ 0.00001 $ 0.00001
Common stock shares authorized 175,000,000 175,000,000
Common stock shares issued 0 0
Common stock shares outstanding 0 0
Class C    
Common stock, par value (in dollars per share) $ 0.00001 $ 0.00001
Common stock shares authorized 90,000,000 90,000,000
Common stock shares issued 17,066,564 17,880,239
Common stock shares outstanding 17,066,564 17,880,239
Class D    
Common stock, par value (in dollars per share) $ 0.00001 $ 0.00001
Common stock shares authorized 175,000,000 175,000,000
Common stock shares issued 79,610,490 79,610,490
Common stock shares outstanding 79,610,490 79,610,490