Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
Equity-Based Compensation - Summary of Equity Grants (Detail)
12 Months Ended
Dec. 31, 2016
$ / shares
shares
Performance Units  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Beginning Balance, Units | shares 6,386
Vested, Units | shares (6,386)
Fair Value per unit $ 3.75
Vested, Range of 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 | shares 4,911
Vested, Units | shares (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
Vested, Range of 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 11.89
Vested, Range of Fair Value per unit $ (10.92)