Consolidated Statements of Income (USD $) In Thousands, except Per Share data	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Consolidated Statements Of Income
Net sales	$ 73,829		$ 64,886		$ 202,818		$ 178,726
Cost of sales	59,570		52,389		165,184		137,729
Gross profit	14,259		12,497		37,634		40,997
Selling, general and administrative expenses	5,445		5,166		16,685		16,592
Income from operations	8,814		7,331		20,949		24,405
Interest expense	(59)		(4)		(173)		(4)
Investment interest income	11		44		54		162
Note receivable interest income	11				33
Other income (expense), net	(122)		(64)		(690)		(186)
Income before income taxes	8,655		7,307		20,173		24,377
Income tax provision	3,029		2,134		7,058		8,265
Net income	$ 5,626		$ 5,173		$ 13,115		$ 16,112
Earnings per share:
Basic	$ 0.23	[1]	$ 0.21	[1]	$ 0.53	[1]	$ 0.64	[1]
Diluted	$ 0.23	[1]	$ 0.21	[1]	$ 0.53	[1]	$ 0.63	[1]
Cash dividends declared per common share:	$ 0.12	[1]	$ 0.12	[1]	$ 0.12	[1]	$ 0.12	[1]
Weighted average shares outstanding:
Basic	24,667	[1]	24,833	[1]	24,708	[1]	25,337	[1]
Diluted	24,844	[1]	24,971	[1]	24,902	[1]	25,471	[1]

[1] Reflects three-for-two stock split effective June 13, 2011.