Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Condensed Consolidated Statements Of Income [Abstract]
Net sales	$ 35,531	$ 34,777
Cost of goods sold	26,057	26,096
Gross profit	9,474	8,681
Selling, general and administrative expense	6,565	6,156
Other operating income (expense):
Litigation settlement gain		7,468
Litigation expense		(227)
Facility consolidation costs		(1,006)
Operating income	2,909	8,760
Other non-operating income, net	5	130
Interest expense	(162)	(212)
Income before income taxes	2,752	8,678
Provision for income taxes	1,229	4,687
Net income	$ 1,523	$ 3,991
Basic and diluted income per common share	$ 0.12	$ 0.32
Cash dividends per share	$ 0.125	$ 0.125
Shares used in the calculation of basic and diluted Income per share	12,386	12,375