Income Per Common Share - Additional Information (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Dilutive effect of outstanding restricted stock awards after application of the Treasury Stock Method (in shares)	216	219	260	188
Common stock shares excluded from calculation of diluted net income per common share (in shares)			2