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Earnings per Common Share (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 29, 2017
Sep. 30, 2016
Sep. 29, 2017
Sep. 30, 2016
Earnings per Common Share        
Basic weighted average outstanding shares 13,731 10,172 13,385 10,150
Dilutive effect of outstanding compensation awards 210 138 242 178
Diluted weighted average number of shares 13,941 10,310 13,627 10,328
Anti-dilutive shares excluded from calculation 96 76 96 76