Stockholders' Equity and Stock-Based Compensation - Summary of Activity of Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 26, 2015	Dec. 27, 2014
Activity of stock option plans [Roll Forward]
Number of Shares Outstanding (Options), Beginning Balance (in shares)	1,382,993
Number of Shares Outstanding (Options), Exercised (in shares)	(191,037)
Number of Shares Outstanding (Options), Cancelled (in shares)	(72,527)
Number of Shares Outstanding (Options), Ending Balance (in shares)	1,119,429	1,382,993
Number of Shares Outstanding (Options), Exercisable (in shares)	948,053
Weighted average exercise price for stock option plans [Roll Forward]
Weighted Average Exercise Price, Beginning Balance (in dollars per share)	$ 13.92
Weighted Average Exercise Price, Exercised (in dollars per share)	9.86
Weighted Average Exercise Price, Cancelled (in dollars per share)	17.22
Weighted Average Exercise Price, Ending Balance (in dollars per share)	14.40	$ 13.92
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 14.07
Weighed Average Remaining Contractual Term, Outstanding	2 years 7 months 17 days	3 years 4 months 28 days
Weighed Average Remaining Contractual Term, Exercisable	2 years 3 months 11 days
Aggregate Intrinsic Value, Outstanding	$ 925	$ 4,108
Aggregate Intrinsic Value, Exercisable	$ 925