Share Capital - Summary of Potentially Dilutive Securities (Parenthetical) (Detail) - USD ($)
$ in Millions
|3 Months Ended||12 Months Ended|
Mar. 31, 2021
Dec. 31, 2020
|Common Stock [Member]|
|Common shares amount||$ 10.1||$ 8.0|
Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of dilutive convertible securities excluding adjustments related to ESOP convertible preferred stock, stock options, and restrictive stock units.
No definition available.