Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2016	Jun. 30, 2015	Jun. 28, 2016	Jun. 30, 2015	Dec. 29, 2015	Dec. 30, 2014
Segment Reporting Information [Line Items]
Refranchising loss	$ 7,872	$ 667	$ 8,943	$ 9,558
Revenues:
Total revenues	698,900	676,657	1,384,053	1,325,161
Segment profit:
Total segment profit	138,170	130,086	280,036	253,332
Depreciation and amortization	38,831	32,335	75,088	66,282
Unallocated General and Administrative Expenses	38,937	28,173	87,119	65,940
Pre-opening expenses	1,440	2,306	3,636	3,955
Interest expense	1,791	417	3,530	903
Other (income) expense, net	114	1,187	(137)	1,003
Income before income taxes	58,326	66,808	113,469	117,703
Capital expenditures:
Capital Expenditures	48,382	55,282	98,955	104,856
Segment Assets
Unallocated cash and cash equivalents	160,018	124,816	160,018	124,816	$ 241,886	$ 196,493
Unallocated trade and other accounts receivable	43,038		43,038		38,211
Unallocated property and equipment	785,426		785,426		776,248
Total assets	1,298,493		1,298,493		1,440,839
Company bakery cafe operations [Member]
Revenues:
Total revenues	609,284	598,124	1,208,068	1,171,800
Franchise operations [Member]
Revenues:
Total revenues	38,017	32,819	75,869	65,212
Operating Segments [Member]
Segment profit:
Depreciation and amortization	38,831		75,088	66,282
Unallocated Amount to Segment [Member]
Segment profit:
Unallocated General and Administrative Expenses	37,668	27,033	84,450	63,486
Segment Assets
Unallocated cash and cash equivalents	160,018		160,018		241,886
Unallocated trade and other accounts receivable	4,482		4,482		2,968
Unallocated property and equipment	112,104		112,104		107,333
Unallocated deposits and other	5,793		5,793		6,660
Other unallocated assets	24,717		24,717		39,592
Operating Segments [Member]
Segment Assets
Total assets	991,379		991,379		1,042,400
Operating Segments [Member] | Company bakery cafe operations [Member]
Revenues:
Total revenues	609,284	598,124	1,208,068	1,171,800
Segment profit:
Total segment profit	94,834	92,945	193,949	178,943
Depreciation and amortization	29,237	25,359	56,934	52,694
Capital expenditures:
Capital Expenditures	35,469	42,592	70,347	78,110
Segment Assets
Total assets	894,829		894,829		953,717
Operating Segments [Member] | Franchise operations [Member]
Revenues:
Total revenues	38,017	32,819	75,869	65,212
Segment profit:
Total segment profit	36,748	31,679	73,200	62,758
Segment Assets
Total assets	13,841		13,841		13,049
Operating Segments [Member] | Fresh dough and other product operations [Member]
Revenues:
Total revenues	102,380	97,767	198,279	187,891
Segment profit:
Total segment profit	6,588	5,462	12,887	11,631
Depreciation and amortization	2,533	2,225	4,638	4,534
Capital expenditures:
Capital Expenditures	4,634	3,499	10,559	4,493
Segment Assets
Total assets	82,709		82,709		$ 75,634
Operating Segments [Member] | Corporate Administration [Member]
Segment profit:
Depreciation and amortization	7,061	4,751	13,516	9,054
Capital expenditures:
Capital Expenditures	8,279	9,191	18,049	22,253
Intersegment Eliminations [Member] | Intersegment Eliminations [Member]
Revenues:
Total revenues	$ (50,781)	$ (52,053)	$ (98,163)	$ (99,742)