Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2015	Dec. 30, 2014	Dec. 31, 2013
Income Taxes
Income before income taxes	$ 159,352	$ 138,544	$ 156,450
Current:
Federal	32,765	28,687	28,754
State	8,880	8,377	8,707
Total current	41,645	37,064	37,461
Deferred:
Federal	2,659	480	5,342
State	(1,475)	(276)	(709)
Total deferred	1,184	204	4,633
Total provision	$ 42,829	$ 37,268	$ 42,094
Income Taxes Rate Reconciliation
Tax at U.S. federal statutory rate (as a percent)	35.00%	35.00%	35.00%
State and district income taxes, net of federal income tax benefit (as a percent)	3.00%	3.80%	3.30%
FICA tip credit (as a percent)	(8.00%)	(8.40%)	(7.00%)
Other credits and incentives (as a percent)	(1.00%)	(0.70%)	(0.90%)
Manufacturing deduction (as a percent)	(2.80%)	(2.90%)	(2.40%)
Deferred compensation (as a percent)	0.30%	(0.40%)	(1.00%)
Other (as a percent)	0.40%	0.50%	(0.10%)
Effective tax rate (as a percent)	26.90%	26.90%	26.90%
Deferred tax assets:
Employee benefits	$ 28,856	$ 24,476
Insurance reserves	19,399	18,012
Accrued rent	21,504	22,291
Stock-based compensation	16,100	15,350
Deferred income	11,406	9,273
Tax credit carryforwards	2,694	1,954
Other	794	1,259
Subtotal	100,753	92,615
Less: Valuation allowance	(618)	(574)
Total	100,135	92,041
Deferred tax liabilities:
Property and equipment	(160,764)	(153,362)
Inventory	(10,154)	(9,749)
Prepaid expenses	(11,741)	(10,363)
Total	(182,659)	(173,474)
Net deferred tax liability	(82,524)	(81,433)
Reconciliation of beginning and ending amount of unrecognized tax benefits
Balance at beginning of year	875	802	$ 695
Additions based on tax positions taken during the current period	192	233	254
Reductions related to settlements with taxing authorities and lapses of statutes of limitations	0	(160)	(147)
Balance at end of year	1,067	875	$ 802
Accrued interest related with uncertain tax positions	100	100
Decrease in unrecognized tax benefits during the next twelve months based on the lapses of statutes of limitations for certain jurisdictions	0
State
Tax credit carryforwards
Tax credit carryforwards	4,100	3,000
Tax credit carryforward valuation allowance	$ 600	$ 600