Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Allowance For Inventory Obsolescence [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 1,266		$ 1,257		$ 6,323
Charged to Costs and Expenses	4,384		217		88
Deductions	(979)		(208)		(5,154)
Balance at End of Period	4,671		1,266		1,257
Allowance For Sales Returns [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	469	[1]	1,033	[1]	1,163	[1]
Charged to Costs and Expenses	400	[1]	(235)	[1]	2,166	[1]
Deductions	(17)	[1]	(329)	[1]	(2,296)	[1]
Balance at End of Period	852	[1]	469	[1]	1,033	[1]
Allowance For Rebates [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	295	[1]	261	[1]	643	[1]
Charged to Costs and Expenses	543	[1]	543	[1]	374	[1]
Charged to Other Accounts	8	[1]	18	[1]	126	[1]
Deductions	(507)	[1]	(527)	[1]	(882)	[1]
Balance at End of Period	339	[1]	295	[1]	261	[1]
Allowance For Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	25		18		2
Charged to Costs and Expenses	3		7		16
Balance at End of Period	$ 28		$ 25		$ 18

[1] Included within other current liabilities in the Company's consolidated balance sheets.