Annual report pursuant to Section 13 and 15(d)

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

v3.19.3.a.u2
Equity-Based Compensation - Summary of RSU Grants (Detail) - Restricted Stock Units - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Beginning Balance, Units 247,316 491,786
Ending Balance, Units 37,234 247,316
Minimum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Fair Value per unit $ 13.19 $ 13.19
Fair Value per unit 13.19 13.19
Maximum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Fair Value per unit 13.23 13.23
Fair Value per unit $ 14.54 $ 13.23
Granted in May 2019    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Restricted stock units granted 34,388  
Fair Value per unit, Granted $ 14.54  
Vested in May 2018    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Vested, Units   (2,843)
Fair Value per unit, Vested   $ (13.19)
Vested in August 2018    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Vested, Units   (241,627)
Fair Value per unit, Vested   $ (13.23)
Vested in May 2019    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Vested, Units (2,843)  
Fair Value per unit, Vested $ (13.19)  
Vested in August 2019    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Vested, Units (241,627)  
Fair Value per unit, Vested $ (13.23)