Commitments and Contingencies (Details) - USD ($)	12 Months Ended
	Dec. 29, 2015	Dec. 30, 2014	Dec. 31, 2013
Aggregate minimum annual lease payments under operating leases
2016	$ 81,890,000
2017	83,836,000
2018	83,797,000
2019	84,002,000
2020	81,762,000
Thereafter	599,026,000
Total	1,014,313,000
Rent expense
Straight-lined minimum base rent	74,981,000	$ 71,828,000	$ 69,427,000
Contingent rent	21,160,000	19,895,000	20,698,000
Common area maintenance and taxes	34,602,000	31,074,000	29,552,000
Total	130,743,000	$ 122,797,000	$ 119,677,000
Purchase obligations	151,000,000
Purchase obligations due in fiscal 2015	90,000,000
Outstanding standby letters of credit	20,000,000
Total accrued liability for self-insured plans	60,000,000
Payments required under event of an actual or constructive termination of employment	2,200,000
Accrued potential bonuses	2,600,000
Annual founder's retirement benefit for ten years after termination of full time employment	$ 650,000
Number of years annual founder's retirement benefit after termination of full time employment	10 years
Minimum
Commitments and contingencies
Operating lease remaining terms, excluding unexercised renewal options	1 year
Contingent rent as a percentage of sales	3.00%
Maximum
Commitments and contingencies
Operating lease remaining terms, excluding unexercised renewal options	20 years
Contingent rent as a percentage of sales	10.00%