Consolidated Statements Of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012
Cash flows from operating activities:
Net earnings	$ 15,155,000	$ 18,047,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Provision for depreciation	4,181,000	4,988,000
Intangibles amortization	333,000
Provision for doubtful accounts	86,000	1,050,000
Other	293,000	470,000
Changes in:
Accounts receivable	3,891,000	15,039,000
Inventories	(20,278,000)	7,058,000
Other current assets	(3,444,000)	151,000
Accounts payable and accrued liabilities	2,476,000	(8,170,000)
Federal and state income taxes	(1,580,000)	(1,668,000)
Net cash provided by operating activities	1,113,000	36,965,000
Cash flows from investing activities:
Marketable securities purchased	(6,151,000)	(14,988,000)
Marketable securities - maturities and sales	16,650,000	10,255,000
Acquisition of property, plant and equipment	(13,425,000)	(6,843,000)
Notes issued		(3,500,000)
Sale of property, plant and equipment	8,000
Acquisition of businesses, net of cash acquired		(246,000)
Net cash provided by (used in) investing activities	(2,918,000)	(15,322,000)
Cash flows from financing activities:
Dividends paid		(41,292,000)
Other		357,000
Net cash used in financing activities		(40,935,000)
Net increase (decrease) in cash and cash equivalents	(1,805,000)	(19,292,000)
Cash and cash equivalents at beginning of period	37,437,000	73,995,000
Cash and cash equivalents at end of period	$ 35,632,000	$ 54,703,000