Segment, Significant Customer and Geographic Information (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Geographic Information
Long-lived assets	$ 58,228	$ 53,082
Geographic net sales	326,248	283,501	259,508
Reporting segment | United States
Geographic Information
Long-lived assets	52,425	51,105
Geographic net sales	267,736	240,453	222,996
Reporting segment | International
Geographic Information
Long-lived assets	5,803	1,977
Geographic net sales	$ 58,512	$ 43,048	$ 36,512