Summary of Significant Accounting Policies (Details 4) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2015	Sep. 29, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 30, 2014	Sep. 30, 2014	Jul. 01, 2014	Apr. 01, 2014	Dec. 29, 2015	Dec. 30, 2014	Dec. 31, 2013
Revenue Recognition
Gift card breakage period									3 years
Gift card breakage									$ 6,600	$ 5,400	$ 4,400
Advertising Costs
Advertising costs									$ 5,000	$ 6,200	$ 5,900
Net income per share
Antidilutive securities excluded from calculation of basic earnings per share (in shares)									1,300	1,000	1,200
Net income per share, basic and diluted
Net income	$ 27,200	$ 26,176	$ 34,724	$ 28,423	$ 24,486	$ 24,223	$ 30,049	$ 22,518	$ 116,523	$ 101,276	$ 114,356
Basic weighted average shares outstanding (in shares)									48,833	49,567	52,229
Dilutive effect of equity awards (in shares)									1,772	2,017	2,148
Diluted weighted average shares outstanding (in shares)									50,605	51,584	54,377
Basic net income per share (in dollars per share)	$ 0.56	$ 0.54	$ 0.72	$ 0.58	$ 0.50	$ 0.49	$ 0.61	$ 0.44	$ 2.39	$ 2.04	$ 2.19
Diluted net income per share (in dollars per share)	$ 0.54	$ 0.52	$ 0.69	$ 0.56	$ 0.48	$ 0.48	$ 0.59	$ 0.43	$ 2.30	$ 1.96	$ 2.10
Restricted stock
Net income per share
Antidilutive securities excluded from calculation of basic earnings per share (in shares)									1,900	1,800	1,700