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Balance Sheet Information (Details 3) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Accrued Warranty
Balance as of the beginning of period	$ 4,942	$ 8,731
Warranties issued during the period	2,778	2,486
Settlements made during the period	(3,315)	(6,389)
Changes in estimates		1,418
Balance as of the end of period	4,405	6,246
Amount of reclassification from the beginning balance of accrued warranty to accrued installation	$ 1,047

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The amount of a reclassification adjustment made to prior period financial statement amounts.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 210

-Section S99

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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Represents the aggregate decrease in the liability related to payments to satisfy claims for standard and extended product warranties.

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Represents the aggregate Increase or Decrease in the liability during the reporting period for accruals related to preexisting standard and extended product warranties (including adjustments for changes in estimates).

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