Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 03, 2012	Jun. 28, 2011	Jul. 03, 2012	Jun. 28, 2011	Jan. 03, 2012
Segment information
Revenues	$ 454,749	$ 430,746	$ 890,503	$ 849,511
Income from operations	40,970	35,162	71,189	65,013
Depreciation and amortization	18,509	17,483	36,807	34,936
Capital expenditures	18,070	19,671	34,419	30,176
Total assets	1,012,752		1,012,752		1,022,570
Restaurants
Segment information
Revenues	442,919	416,549	867,921	823,452
Income from operations	64,396	56,621	119,920	108,518
Depreciation and amortization	16,819	15,819	33,427	31,597
Capital expenditures	14,435	18,523	26,025	26,947
Total assets	814,946		814,946		835,393
Bakery
Segment information
Revenues	30,154	28,110	56,327	53,947
Income from operations	1,986	1,885	3,796	2,885
Depreciation and amortization	629	640	1,274	1,291
Capital expenditures	1,784	512	4,892	633
Total assets	66,818		66,818		61,382
Intercompany bakery sales
Segment information
Revenues	(18,324)	(13,913)	(33,745)	(27,888)
Corporate
Segment information
Income from operations	(25,412)	(23,344)	(52,527)	(46,390)
Depreciation and amortization	1,061	1,024	2,106	2,048
Capital expenditures	1,851	636	3,502	2,596
Total assets	$ 130,988		$ 130,988		$ 125,795