Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013
Cash flows from operating activities:
Net income	$ 41,271	$ 56,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	43,763	37,502
Amortization	5,737	5,321
Gain on disposition of fixed assets	(2,531)	(2,586)
Impairment of fixed assets	0	2,088
Gain on sale of marketable securities	(46)	(1,734)
Gain on sale of intangible assets	0	(250)
Deferred income taxes	371	9,370
Changes in operating assets and liabilities:
Inventories	20,720	11,824
Accounts receivable and prepaid expenses	(9,113)	(8,490)
Income taxes recoverable	0	(4,624)
Accounts payable and other liabilities	(7,524)	5,997
Income taxes payable	(1,095)	(1,359)
Other	117	(21)
Net cash provided by operating activities	91,670	109,038
Cash flows from investing activities:
Purchase of property and equipment	(58,027)	(89,286)
Proceeds from the sale of property and equipment	3,288	3,626
Purchase of marketable securities	(8,138)	(10,570)
Proceeds from maturities of marketable securities	2,250	650
Proceeds from the sale of marketable securities	1,651	17,984
Purchase of intangible assets	(1,125)	(698)
Proceeds from the sale of intangible assets	0	250
Change in SERP investment	(81)	(1,096)
Net cash used in investing activities	(60,182)	(79,140)
Cash flows from financing activities:
Dividends paid	(24,209)	(24,209)
Net cash used in financing activities	(24,209)	(24,209)
Net increase in cash and cash equivalents	7,279	5,689
Cash and cash equivalents at beginning of year	17,965	14,381
Cash and cash equivalents at end of period	$ 25,244	$ 20,070