Other Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012	Dec. 31, 2012
Other Accrued Liabilities [Abstract]
Accrued warranty, current	$ 1,117		$ 1,378	$ 1,274
Accrued taxes, net	1,638	[1]		4,304	[1]
Accrued sales return	7,940	[2]	11,789
Other accrued liabilities	3,844			4,620
Total other accrued liabilities	14,539			22,099	[3]
Balance at beginning of year	11,901	[2]	6,143
Additions that reduce net sales	17,156		22,224
Deductions from reserves	(21,117)		(16,578)
Balance at end of period	$ 7,940	[2]	$ 11,789

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

[2] The activity in the sales returns liability account was as follows: Six Months Ended June 30, 2013 2012 (unaudited) (unaudited) Balance at beginning of year $ 11,901 $ 6,143 Additions that reduce net sales 17,156 22,224 Deductions from reserves (21,117 ) (16,578 ) Balance at end of period $7,940 $11,789

[3] Restated