Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Schedule of Weighted Average Grant Date Fair Value of Restricted Stock Units Issued (Detail)

v3.19.3.a.u2
Stock-Based Compensation - Schedule of Weighted Average Grant Date Fair Value of Restricted Stock Units Issued (Detail) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Restricted Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant date fair value, Granted $ 12.48 $ 16.76 $ 8.00