Valuations and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 1,294		$ 3,925		$ 3,018
Allowance Additions or (Reductions)	75,116		72,168		74,910
Returns and Price Adjustments	(75,598)		(74,799)		(74,003)
Bad Debt Write-offs	0		0		0
Balance at End of Year	812		1,294		3,925
OEM and Stocking Representative Returns and Price Adjustments [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	1,066		995		1,272
Allowance Additions or (Reductions)	1,452		2,359		2,164
Returns and Price Adjustments	(1,806)		(2,288)		(2,441)
Bad Debt Write-offs	0		0		0
Balance at End of Year	712		1,066		995
Unclaimed Distributor Price Adjustments [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	169	[1]	2,885	[1]	1,701	[1]
Allowance Additions or (Reductions)	73,674	[1]	69,795	[1]	72,746	[1]
Returns and Price Adjustments	(73,792)	[1]	(72,511)	[1]	(71,562)	[1]
Bad Debt Write-offs	0	[1]	0	[1]	0	[1]
Balance at End of Year	51	[1]	169	[1]	2,885	[1]
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	59		45		45
Allowance Additions or (Reductions)	(10)		14		0
Returns and Price Adjustments	0		0		0
Bad Debt Write-offs	0		0		0
Balance at End of Year	$ 49		$ 59		$ 45

[1] The Company estimates and records an allowance for sell-through distributor price adjustments for which the specific resale transaction has been completed, but the price adjustment claim has not yet been received from the sell-through distributor. This allowance typically represents approximately one to three weeks of unclaimed price adjustments.