Net Income Per Common Share (Reconciliation of Basic and Diluted Weighted Average Shares) (Details) - shares	3 Months Ended
	Apr. 02, 2021	Mar. 27, 2020
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding	30,207,490	29,889,142
Unvested restricted stock units and common stock subject to vesting requirements issued to employees and non-employees	264,210	97,577
Common stock issuable upon the exercise of stock options and SARs	2,297,467	2,277,288
Dilutive weighted average common shares outstanding	32,769,167	32,264,007