Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 27, 2011	Dec. 28, 2010	Dec. 29, 2009
Cash flows from operations:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 135,952	$ 111,599	$ 86,851
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	79,899	68,673	67,162
(Gain) loss from short-term investments	0	0	1,339
Stock-based compensation expense	9,861	9,558	8,661
Tax benefit from exercise of stock options	4,994	3,603	5,095
Deferred income taxes	1,351	(4,660)	22,950
Other	2,423	1,114	2,799
Changes in operating assets and liabilities, excluding the effect of acquisitions:
Trade and other accounts receivable, net	16,369	13,180	3,554
Inventories	2,183	1,540	336
Prepaid expenses	7,323	7,694	2,224
Deposits and other	(117)	2,337	(100)
Accounts payable	8,538	929	2,381
Accrued expenses	19,630	61,891	28,901
Deferred rent	6,081	4,603	3,591
Other long-term liabilities	3,906	12,281	4,056
Net cash provided by operating activities	236,889	237,634	214,904
Cash flows from investing activities:
Additions to property and equipment	(107,932)	(82,226)	(54,684)
Acquisitions, net of cash acquired	(44,377)	(52,177)	0
Proceeds from sale of bakery-cafes	(115)	(2,204)	0
Investment maturities proceeds	0	0	5,465
Net cash used in investing activities	(152,194)	(132,199)	(49,219)
Cash flows from financing activities:
Repurchase of common stock	(96,605)	(153,492)	(3,453)
Exercise of employee stock options	3,193	25,551	22,818
Tax benefit from exercise of stock options	4,994	3,603	5,095
Proceeds from issuance of common stock under employee benefit plans	2,040	1,802	1,626
Purchase of noncontrolling interest	0	0	(20,081)
Payment of Deferred Acquisition Holdbacks	(4,976)	0	0
Net cash (used in) provided by financing activities	(91,354)	(122,536)	6,005
Net (decrease) increase in cash and cash equivalents	(6,659)	(17,101)	171,690
Cash and Cash Equivalents at beginning of period	229,299	246,400	74,710
Cash and Cash Equivalents, at Carrying Value	$ 222,640	$ 229,299	$ 246,400