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Acquisitions (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended			3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Sep. 02, 2011 Ash [Member]	Mar. 31, 2011 Ostial [Member]	Jan. 30, 2012 Ostial [Member]	Sep. 02, 2011 Developed Technology Rights [Member] Ash [Member]	Jan. 30, 2012 Developed Technology Rights [Member] Ostial [Member]	Sep. 02, 2011 Customer Lists [Member] Ash [Member]	Jan. 30, 2012 Customer Lists [Member] Ostial [Member]	Jan. 30, 2012 Trade Names [Member] Ostial [Member]	Jan. 30, 2012 Noncompete Agreements [Member] Ostial [Member]
Business Acquisition [Line Items]
Property and equipment			$ 73
Intangibles						3,200	16,200	300	700	150	20
Goodwill			2,697		4,430
Business Acquisition, Purchase Price Allocation, Assets Acquired			6,270		21,500
NET SALES	95,618	86,631
Net Sales, Pro Forma				86,685
Net income	5,748	6,639
Net Income, Pro Forma				$ 6,272
Basic (in dollars per share)	$ 0.14	$ 0.19
Basic, Pro Forma (in dollars per share)				$ 0.18
Diluted (in dollars per share)	$ 0.14	$ 0.18
Dilued, Pro Forma (in dollars per share)				$ 0.17