Summary of Treasury Stock Activity (Detail) (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Treasury Stock [Line Items]
Common stock repurchased value as result of restricted stock forfeitures	$ 0.001	$ 0.001	$ 0.001
Minimum
Schedule of Treasury Stock [Line Items]
Market Value of Restricted Shares	15.21	8.03	36.81
Maximum
Schedule of Treasury Stock [Line Items]
Market Value of Restricted Shares	$ 24.14	$ 32.12	$ 40.32