Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 26, 2011	Jun. 27, 2010	Jun. 26, 2011	Jun. 27, 2010
Total revenues	$ 293,534	$ 280,647	$ 606,001	$ 566,433
Income from the franchise cheese-purchasing program, net of noncontrolling interest		(2,173)		(4,982)
General and administrative expenses	27,617	28,990	56,691	56,850
Other general expenses	1,459	1,687	2,240	3,977
Depreciation and amortization	8,425	8,175	16,737	16,055
Total costs and expenses	274,379	257,848	559,635	515,692
Operating income	19,155	22,799	46,366	50,741
Investment income	205	197	382	428
Interest expense	(293)	(1,333)	(901)	(2,577)
Income before income taxes	19,067	21,663	45,847	48,592
Income tax expense	6,014	7,560	15,245	16,525
Net income, including noncontrolling interests	13,053	14,103	30,602	32,067
Less: Income attributable to noncontrolling interests	(929)	(911)	(2,051)	(2,000)
Net income, net of noncontrolling interests	12,124	13,192	28,551	30,067
Basic earnings per common share	$ 0.48	$ 0.49	$ 1.12	$ 1.12
Earnings per common share - assuming dilution	$ 0.47	$ 0.49	$ 1.11	$ 1.11
Basic weighted average shares outstanding	25,464	26,760	25,474	26,901
Diluted weighted average shares outstanding	25,685	26,971	25,713	27,036
Domestic Company-owned Restaurant [Member]
Revenue from external customers	127,641	124,594	266,312	254,238
Cost of sales	30,162	27,020	62,262	54,306
Salaries and benefits	34,367	34,192	72,016	69,595
Advertising and related costs	11,898	11,149	24,687	22,553
Occupancy costs	7,939	7,930	15,808	15,770
Other operating expenses	18,492	17,844	38,407	36,034
Total costs and expenses	102,858	98,135	213,180	198,258
North America [Member]
Franchise royalties	18,103	17,440	37,834	35,485
Franchise and development fees	124	106	309	311
Other sales	12,370	13,023	25,817	27,536
Domestic Commissaries [Member]
Revenue from external customers	121,027	113,936	248,699	226,576
International [Member]
Royalties and franchise and development fees	4,049	3,153	7,811	6,319
International operating expenses	8,756	7,430	16,484	14,206
International Restaurant and Commissaries [Member]
Revenue from external customers	10,220	8,395	19,219	15,968
Domestic Commissary and Other [Member]
Cost of sales	103,529	95,195	209,972	190,487
Salaries and benefits	8,651	8,568	17,662	17,300
Other operating expenses	13,084	11,841	26,669	23,541
Total costs and expenses	$ 125,264	$ 115,604	$ 254,303	$ 231,328