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Balance Sheet Information (Tables) | 3 Months Ended
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Mar. 31, 2012
Balance Sheet Information |
Schedule of available-for-sale securities |
|  | March 31, 2012 |
|  | Amortized Cost |  | Gains in Accumulated Other Comprehensive Income |  | Losses in Accumulated Other Comprehensive Income |  | Estimated Fair Value |
Government Agency Securities |  | $ | 54,782 |  | $ | 44 |  | $ | — |  | $ | 54,826 |
FDIC insured corporate bonds |  | 106,331 |  | 45 |  | — |  | 106,376 |
Treasury bills |  | 86,626 |  | — |  | (2 | ) | 86,624 |
Total available-for-sale securities |  | $ | 247,739 |  | $ | 89 |  | $ | (2 | ) | $ | 247,826 |
|  | December 31, 2011 |
|  | Amortized Cost |  | Gains in Accumulated Other Comprehensive Income |  | Losses in Accumulated Other Comprehensive Income |  | Estimated Fair Value |
Government Agency Securities |  | $ | 88,585 |  | $ | 119 |  | $ | — |  | $ | 88,704 |
FDIC insured corporate bonds |  | 114,640 |  | 56 |  | — |  | 114,696 |
Treasury bills |  | 70,147 |  | 44 |  | — |  | 70,191 |
Total available-for-sale securities |  | $ | 273,372 |  | $ | 219 |  | $ | — |  | $ | 273,591 |
Schedule of contractual maturities of available-for-sale debt securities |
|  | Estimated Fair Value |
Due in one year or less |  | $ | 33,272 |
Due in 1—2 years |  | 214,554 |
Total investments in debt securities |  | $ | 247,826 |
Schedule of inventories |
|  | March 31, |  | December 31, |
|  | 2012 |  | 2011 |
Raw materials |  | $ | 60,786 |  | $ | 57,169 |
Work in process |  | 25,714 |  | 20,118 |
Finished goods |  | 16,776 |  | 36,147 |
|  | $ | 103,276 |  | $ | 113,434 |
Schedule of changes in warranty liability |
|  | March 31, |
|  | 2012 |  | 2011 |
Balance as of the beginning of period |  | $ | 9,778 |  | $ | 9,238 |
Warranties issued during the period |  | 1,007 |  | 3,014 |
Settlements made during the period |  | (1,951 | ) | (2,121 | )
Balance as of the end of period |  | $ | 8,834 |  | $ | 10,131 |

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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic -SubTopic -Publisher SEC -Number 210 -Article 5 -Subparagraph a,b,c -Name Regulation S-X (SX) -Paragraph 6 -Section 2 + Details
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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 460 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 8 -Section 50 -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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