Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Cash flows from operating activities:
Net earnings	$ 6,854	$ 9,344
Adjustments to reconcile net earnings to net cash provided by operating activities:
Provision for depreciation	2,114	2,434
Intangibles amortization	167
Provision for doubtful accounts	56	100
Other	109	292
Changes in:
Accounts receivable	25,914	7,004
Inventories	(13,513)	(812)
Other current assets	(6,835)	(11)
Accounts payable and accrued liabilities	(5,088)	(9,829)
Federal and state income taxes	1,043	3,142
Net cash provided by operating activities	10,821	11,664
Cash flows from investing activities:
Marketable securities purchased	(1,709)	(1,623)
Marketable securities - maturities and sales	2,264	6,372
Acquisition of property, plant and equipment	(5,769)	(4,493)
Sale of property, plant and equipment	3
Net cash provided by (used in) investing activities	(5,211)	256
Cash flows from financing activities:
Dividends paid		(41,292)
Other		357
Net cash used in financing activities		(40,935)
Net increase (decrease) in cash and cash equivalents	5,610	(29,015)
Cash and cash equivalents at beginning of period	37,437	73,995
Cash and cash equivalents at end of period	$ 43,047	$ 44,980