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Earnings Per Share (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Oct. 02, 2021	Jul. 03, 2021	Apr. 03, 2021	Dec. 31, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income	$ 38,121	$ 35,202	$ 44,384	$ 38,192	$ 31,713	$ 24,753	$ 18,594	$ 15,338	$ 155,899	$ 90,398	$ 32,291
Denominator:
Weighted average number of common shares outstanding - Basic									17,585,604	17,486,054	17,461,421
Dilutive effect of options and restricted stock units outstanding under the Company's employee compensation plans									172,230	283,802	317,411
Weighted average number of common shares outstanding - Diluted									17,757,834	17,769,856	17,778,832

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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