Other Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012	Dec. 31, 2012
Other Accrued Liabilities [Abstract]
Accrued warranty, current	$ 1,190		$ 1,308	$ 1,274
Accrued taxes, net, as restated	1,401	[1]		4,304	[1]
Accrued sales return	11,548	[2]	9,983
Other accrued liabilities	2,540			4,620
Total other accrued liabilities	16,679	[3]		22,099
Balance at beginning of year	11,901	[2]	6,143
Additions that reduce net sales	10,008		10,566
Deductions from reserves	(10,241)		(6,726)
Balance at end of period	$ 11,548	[2]	$ 9,983

[1] The December 31, 2012 balance is shown as Restated.

[2] The activity in the sales returns liability account was as follows: Three Months Ended March 31, 2013 2012 (unaudited) (unaudited) Balance at beginning of year $ 11,781 $ 6,143 Additions that reduce net sales 10,008 43,284 Deductions from reserves (10,241 ) (37,526 ) Balance at end of period $ 11,548 $ 11,901

[3] (unaudited)