Weighted Average Common Shares - Additional Information (Detail) - shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Shares granted, restricted stock (in shares)	779,167	1,120,836
Shares granted, performance share units (in shares)	205,155	307,999
Shares granted, stock options (in shares)	319,295	686,639