Quarterly report pursuant to Section 13 or 15(d)

Computations of Basic and Diluted Earnings Per Share (Parenthetical) (Detail)

v3.19.3
Computations of Basic and Diluted Earnings Per Share (Parenthetical) (Detail) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Earnings Per Share [Abstract]        
Weighted average shares of participating restricted stock 793 708 719 677