Equity-Based Compensation - Issued and Unvested Shares of Restricted Stock Granted (Detail) - Restricted Stock, Time Vested	Sep. 30, 2016 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested (in shares)	2,676,280
First Vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested (in shares)	1,355,700
Second Vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested (in shares)	419,283
Third Vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested (in shares)	901,297