Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 24, 2011	Sep. 25, 2010
Cash flows from operating activities:
Net income	$ 56,283	$ 54,207
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	38,735	35,873
Amortization	4,697	4,836
Gain on disposition of fixed assets	(576)	(1,228)
Gain on sale of marketable securities	(1,272)	(223)
Changes in operating assets and liabilities:
Inventories	8,427	(7,038)
Accounts receivable and prepaid expenses	4,872	9,908
Income taxes recoverable	2,712
Accounts payable and other liabilities	(19,647)	(14,964)
Income taxes payable	135	32,373
Deferred income taxes	12,425	(1,605)
Other	(2,887)	(101)
Net cash provided by operating activities	103,904	112,038
Cash flows from investing activities:
Purchase of property and equipment	(72,173)	(33,597)
Proceeds from the sale of property and equipment	1,908	1,955
Purchase of marketable securities	(56,165)
Proceeds from maturities of marketable securities	8,370	5,376
Proceeds from the sale of marketable securities	6,814	341
Purchase of intangible assets	(121)
Net cash used in investing activities	(111,367)	(25,925)
Cash flows from financing activities:
Dividends paid	(23,402)	(23,402)
Net cash used in financing activities	(23,402)	(23,402)
Net (decrease) increase in cash and cash equivalents	(30,865)	62,711
Cash and cash equivalents at beginning of year	109,140	67,065
Cash and cash equivalents at end of period	$ 78,275	$ 129,776