Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 3,617	$ 4,418	$ 17,359	$ 12,103
Basic Earnings Per Common Share (EPS), Shares	16,503,000	16,427,000	16,486,000	16,411,000
Basic EPS, Per Share Amount	$ 0.22	$ 0.27	$ 1.05	$ 0.74
Dilutive securities, common stock options, Shares	206,000	202,000	235,000	157,000
Dilutive securities, common stock options, Per Share Amount	$ (0.00)	$ (0.00)	$ 0.01	$ 0
Diluted EPS, Shares	16,709,000	16,629,000	16,721,000	16,568,000
Diluted EPS, Per Share Amount	$ 0.22	$ 0.27	$ 1.04	$ 0.73
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive options and RSUs, shares			253,664
RSU Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive options and RSUs, shares				130,259