Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 30, 2015		Sep. 30, 2015		Jul. 01, 2015		Apr. 01, 2015		Dec. 31, 2014		Sep. 24, 2014		Jun. 25, 2014		Mar. 26, 2014		Dec. 30, 2015	Dec. 31, 2014	Dec. 25, 2013
Earnings Per Share [Abstract]
Net income	$ 8,759		$ 8,950		$ 9,734		$ 8,533		$ 9,678		$ 8,343		$ 8,273		$ 6,431		$ 35,976	$ 32,725	$ 24,572
Weighted average shares outstanding - basic (in shares)																	82,627	86,323	90,829
Effect of dilutive share-based compensation awards																	2,102	2,032	2,074
Weighted average shares outstanding - diluted (in shares)																	84,729	88,355	92,903
Basic net income per share	$ 0.11	[1]	$ 0.11	[1]	$ 0.12	[1]	$ 0.10	[1]	$ 0.11	[2]	$ 0.10	[2]	$ 0.10	[2]	$ 0.07	[2]	$ 0.44	$ 0.38	$ 0.27
Diluted net income per share	$ 0.11	[1]	$ 0.11	[1]	$ 0.11	[1]	$ 0.10	[1]	$ 0.11	[2]	$ 0.10	[2]	$ 0.09	[2]	$ 0.07	[2]	$ 0.42	$ 0.37	$ 0.26
Anti-dilutive share-based compensation awards (in shares)																	0	218	331

[1] Per share amounts do not necessarily sum to the total year amounts due to changes in shares outstanding and rounding

[2] Per share amounts do not necessarily sum to the total year amounts due to changes in shares outstanding and rounding.