Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 71,721	$ 82,511	$ 75,584
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	51,068	44,153	53,185
Amortization	7,207	6,498	6,198
Loss (gain) on disposition/impairment of fixed assets	55	(1,407)	(576)
Gain on sale of marketable securities	(1,775)	(713)	(1,447)
Gain on sale of intangible assets	(780)	0	0
Gain on acquisition of business	0	(414)	0
Deferred income taxes	10,377	15,611	16,723
Changes in operating assets and liabilities:
Inventories	4,791	(17,936)	4,830
Accounts receivable and prepaid expenses	(10,512)	(2,569)	(1,664)
Income taxes recoverable	0	1,226	1,486
Accounts payable and other liabilities	9,546	(5,045)	2,119
Income taxes payable	269	1,359	0
Other	665	687	(4,029)
Net cash provided by operating activities	142,632	123,961	152,409
Cash flows from investing activities:
Purchase of property and equipment	(128,055)	(109,774)	(110,517)
Proceeds from the sale of property and equipment	4,451	2,542	2,097
Purchase of marketable securities	(12,635)	(13,790)	(81,885)
Proceeds from maturities of marketable securities	1,150	0	8,620
Proceeds from the sale of marketable securities	30,170	19,941	16,019
Acquisition of business	0	(6,116)	0
Purchase of intangible assets	(937)	(439)	(121)
Proceeds from the sale of intangible assets	780	0	0
Change in SERP investment	(1,694)	(165)	(122)
Net cash used in investing activities	(106,770)	(107,801)	(165,909)
Cash flows from financing activities:
Dividends paid	(32,278)	(32,278)	(58,370)
Net cash used in financing activities	(32,278)	(32,278)	(58,370)
Net increase (decrease) in cash and cash equivalents	3,584	(16,118)	(71,870)
Cash and cash equivalents at beginning of year	14,381	30,499	102,369
Cash and cash equivalents at end of year	$ 17,965	$ 14,381	$ 30,499