Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation - Summary of Equity Grants (Detail)

v3.7.0.1
Equity-Based Compensation - Summary of Equity Grants (Detail) - $ / shares
6 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Performance Units    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Beginning Balance, Units 6,386  
Forfeited, Units (6,386)  
Fair Value per unit   $ 3.75
Deferred Compensation Share Based Payments    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Beginning Balance, Units 4,911  
Vested, Units (4,911)  
Deferred Compensation Share Based Payments | Minimum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Fair Value per unit   12.00
Deferred Compensation Share Based Payments | Maximum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Fair Value per unit   $ 14.25
Vested, Range of Fair Value per unit $ (10.92)