Annual report pursuant to Section 13 and 15(d)

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

v3.20.4
Equity-Based Compensation - Summary of RSU Grants (Detail) - Restricted Stock Units - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Beginning Balance, Units 37,234 247,316
Ending Balance, Units 83,150 37,234
Minimum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Fair Value per unit $ 13.19 $ 13.19
Fair Value per unit 10.18 13.19
Maximum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Fair Value per unit 14.54 13.23
Fair Value per unit $ 14.54 $ 14.54
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
Granted in March 2020    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Restricted stock units granted 8,242  
Fair Value per unit, Granted $ 11.83  
Granted in May 2020    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Restricted stock units granted 49,116  
Fair Value per unit, Granted $ 10.18  
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)
Vested in May 2020    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Vested, Units (11,442)  
Vested in May 2020 | Minimum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Fair Value per unit, Vested $ (13.19)  
Vested in May 2020 | Maximum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Fair Value per unit, Vested $ (14.54)