Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
Cash flows from operating activities:
Net income	$ 13,109	$ 14,766
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	15,303	14,173
Amortization	1,996	1,924
Loss (gain) on disposition of fixed assets	8	(1,809)
Gain on sale of marketable securities	(6)	(41)
Deferred income taxes	(3,880)	(1,308)
Changes in operating assets and liabilities:
Inventories	3,093	9,775
Accounts receivable and prepaid expenses	4,608	(6,170)
Income taxes recoverable	612	0
Accounts payable and other liabilities	(9,666)	(1,298)
Income taxes payable	5,666	4,012
Other	183	168
Net cash provided by operating activities	31,026	34,192
Cash flows from investing activities:
Purchase of property and equipment	(20,624)	(17,880)
Proceeds from the sale of property and equipment	27	2,042
Purchase of marketable securities	(9,907)	(603)
Proceeds from the sale of marketable securities	3,191	106
Purchase of intangible assets	(644)	(30)
Change in SERP investment	(873)	(807)
Net cash used in investing activities	(28,830)	(17,172)
Cash flows from financing activities:
Dividends paid	(8,070)	(8,070)
Net cash used in financing activities	(8,070)	(8,070)
Net (decrease) increase in cash and cash equivalents	(5,874)	8,950
Cash and cash equivalents at beginning of year	22,986	17,965
Cash and cash equivalents at end of period	$ 17,112	$ 26,915