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Equity - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Class of Stock [Line Items]    
Repurchase of Class A shares for employee tax withholding $ 150 $ 663
Common Class A    
Class of Stock [Line Items]    
Shares repurchased for employee tax withholdings (in shares) 3,328  
Repurchase of Class A shares for employee tax withholding $ 150