Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenue from External Customer [Line Items]
Net revenues	$ 250,112	$ 259,025	$ 297,366
Standard Products [Member]
Revenue from External Customer [Line Items]
Net revenues	240,389	249,743	289,347
Other Products [Member]
Revenue from External Customer [Line Items]
Net revenues	$ 9,723	$ 9,282	$ 8,019
World Wide Distributor Two [Member] | Customer Concentration Risk [Member] | Sales [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage	15.00%	16.00%	17.00%
World Wide Distributor One [Member] | Customer Concentration Risk [Member] | Sales [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage	22.00%	24.00%	19.00%
Original Equipment Manufacturer [Member] | Customer Concentration Risk [Member] | Sales [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%