Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 25, 2012	Dec. 27, 2011
Cash flows from operations:
Net Income	$ 196,169,000	$ 173,448,000	$ 135,952,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	106,523,000	90,939,000	79,899,000
Stock-based compensation expense	10,703,000	9,094,000	9,861,000
Tax benefit from exercise of stock options	(8,100,000)	(8,587,000)	(4,994,000)
Increase (Decrease) in Deferred Income Taxes	10,356,000	20,334,000	1,351,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	5,764,000	3,995,000	1,789,000
Other	589,000	475,000	634,000
Changes in operating assets and liabilities, excluding the effect of acquisitions:
Trade and other accounts receivable, net	3,021,000	(31,414,000)	(16,369,000)
Inventories	(2,186,000)	(2,440,000)	(2,183,000)
Prepaid expenses	(841,000)	(10,995,000)	(7,323,000)
Deposits and other	1,449,000	161,000	117,000
Accounts payable	8,162,000	(6,513,000)	8,538,000
Accrued expenses	13,372,000	49,246,000	19,630,000
Deferred rent	5,868,000	5,718,000	6,081,000
Other long-term liabilities	(2,432,000)	(4,005,000)	3,906,000
Net cash provided by operating activities	348,417,000	289,456,000	236,889,000
Cash flows from investing activities:
Additions to property and equipment	(192,010,000)	(152,328,000)	(107,932,000)
Acquisitions, net of cash acquired	(2,446,000)	(47,951,000)	(44,377,000)
Purchase of investments	(97,919,000)	0	0
Proceeds from sale of investments	97,936,000	0	0
Proceeds from sale of property and equipment	0	0	115,000
Proceeds from sale-leaseback transactions	6,132,000	4,538,000	0
Net cash used in investing activities	(188,307,000)	(195,741,000)	(152,194,000)
Cash flows from financing activities:
Repurchase of common stock	(339,409,000)	(31,566,000)	(96,605,000)
Exercise of employee stock options	573,000	4,455,000	3,193,000
Tax benefit from exercise of stock options	8,100,000	8,587,000	4,994,000
Proceeds from issuance of common stock under employee benefit plans	2,842,000	2,462,000	2,040,000
Debt Issuance Cost	0	(1,097,000)	0
Payment of Deferred Acquisition Holdback	(4,112,000)	(2,055,000)	(4,976,000)
Net cash (used in) provided by financing activities	(332,006,000)	(19,214,000)	(91,354,000)
Net (decrease) increase in cash and cash equivalents	(171,896,000)	74,501,000	(6,659,000)
Cash and Cash Equivalents, at Carrying Value	297,141,000	222,640,000
Cash and Cash Equivalents, at Carrying Value	$ 125,245,000	$ 297,141,000	$ 222,640,000