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Earnings per Common Share
6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Earnings per Common Share
Earnings per Common Share

Basic per share amounts have been computed based on the average number of common shares outstanding.  Diluted per share amounts reflect the increase in average common shares outstanding that would result from the assumed exercise of outstanding stock options and vesting of restricted stock awards, computed using the treasury stock method.  Approximately six thousand and four thousand stock-based awards were excluded from the computation of diluted earnings per share for the quarters ended June 30, 2018 and July 1, 2017, respectively, because they were antidilutive.