Net Income Per Common Share (Basic And Diluted Weighted Average Shares) (Details) - shares	3 Months Ended		9 Months Ended
	Oct. 02, 2015	Sep. 26, 2014	Oct. 02, 2015	Sep. 26, 2014
Net Income Per Common Share [Abstract]
Basic weighted average common shares outstanding	28,755,225	28,557,528	28,674,838	28,872,043
Unvested restricted stock units and common stock subject to vesting requirements issued to employees and non-employees	1,919,882	1,232,971	1,419,441	1,002,642
Common stock issuable upon the exercise of stock options	813,283	9,826	670,454	9,589
Diluted weighted average common shares outstanding	31,488,390	29,800,325	30,764,732	29,884,274