XML 87 R75.htm IDEA: XBRL DOCUMENT v3.19.2
Income Per Common Share - Additional Information (Detail) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Earnings Per Share [Abstract]        
Dilutive effect of outstanding restricted stock awards after application of the Treasury Stock Method 77,000 107,000 102,000 166,000
Common stock shares excluded from calculation of diluted net income per common share     9,000