Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2012	Sep. 24, 2011
Cash flows from operating activities:
Net income	$ 60,407	$ 56,283
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	32,831	38,735
Amortization	4,685	4,697
Loss (gain) on disposition of fixed assets	280	(576)
Gain on sale of marketable securities	(708)	(1,272)
Gain on acquisition of business	(414)
Changes in operating assets and liabilities:
Inventories	(9,190)	8,427
Accounts receivable and prepaid expenses	(194)	4,872
Income taxes recoverable	1,187	2,712
Accounts payable and other liabilities	(8,264)	(19,647)
Income taxes payable	12,257	135
Deferred income taxes	2,045	12,425
Other	652	(2,887)
Net cash provided by operating activities	95,574	103,904
Cash flows from investing activities:
Purchase of property and equipment	(75,411)	(72,173)
Proceeds from the sale of property and equipment	325	1,908
Purchase of marketable securities	(10,935)	(56,165)
Proceeds from maturities of marketable securities		8,370
Proceeds from the sale of marketable securities	17,936	6,814
Acquisition of business	(6,116)
Purchase of intangible assets	(234)	(121)
Net cash used in investing activities	(74,435)	(111,367)
Cash flows from financing activities:
Dividends paid	(24,208)	(23,402)
Net cash used in financing activities	(24,208)	(23,402)
Net decrease in cash and cash equivalents	(3,069)	(30,865)
Cash and cash equivalents at beginning of year	37,392	109,140
Cash and cash equivalents at end of period	$ 34,323	$ 78,275