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Income Per Common Share - Additional Information (Detail) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Earnings Per Share [Abstract]        
Dilutive effect of outstanding restricted stock awards after application of the Treasury Stock Method 137,000 77,000 173,000 102,000
Common stock shares excluded from calculation of diluted net income per common share     6,000