Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2011	Jun. 29, 2010	Jun. 28, 2011	Jun. 29, 2010	Dec. 28, 2010
Segment Information
Number of business segments			2
Segment information
Revenues	$ 430,746	$ 418,909	$ 849,511	$ 824,342
Income from operation	35,162	37,295	65,013	65,972
Total of depreciation and amortization	17,483	18,026	34,936	36,181
Total of Capital expenditures	19,671	10,953	30,176	17,865
Assets	995,722		995,722		1,037,307
Restaurants
Segment information
Revenues	416,549	404,797	823,452	798,469
Income from operation	56,621	58,387	108,518	107,727
Total of depreciation and amortization	15,819	15,971	31,597	32,002
Total of Capital expenditures	18,523	10,113	26,947	16,387
Assets	817,814		817,814		882,208
Bakery
Segment information
Revenues	28,110	27,182	53,947	52,530
Income from operation	1,885	2,219	2,885	4,734
Total of depreciation and amortization	640	772	1,291	1,539
Total of Capital expenditures	512	230	633	355
Assets	56,414		56,414		56,796
Intercompany bakery sales
Segment information
Revenues	(13,913)	(13,070)	(27,888)	(26,657)
Corporate
Segment information
Income from operation	(23,344)	(23,311)	(46,390)	(46,489)
Total of depreciation and amortization	1,024	1,283	2,048	2,640
Total of Capital expenditures	636	610	2,596	1,123
Assets	$ 121,494		$ 121,494		$ 98,303