Equity-Based Compensation - Issued and Unvested Shares of Restricted Stock Granted (Detail) - Restricted stock, time vested	Mar. 31, 2017 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested (in shares)	2,136,928
First vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested (in shares)	1,335,700
Second vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested (in shares)	263,756
Third vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested (in shares)	537,472