Note 14. Commitments and Contingencies (Details) - Product Warranties (USD $) In Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 25, 2010	Sep. 30, 2011	Sep. 25, 2010
Movement in Standard Product Warranty Accrual [Roll Forward]
Product warranty liability, beginning of period	$ 36,356	$ 23,862	$ 27,894	$ 22,583
Accruals for new warranties issued (warranty expense)	6,627	5,458	17,189	13,130
Settlements	(5,373)	(7,035)	(11,828)	(16,008)
Change in estimate of warranty liability	4,895	2,747	9,250	5,327
Product warranty liability, end of period	42,505	25,032	42,505	25,032
Current portion of warranty liability	12,437	10,297	12,437	10,297
Noncurrent portion of warranty liability	$ 30,068	$ 14,735	$ 30,068	$ 14,735

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Represents the aggregate increase in the liability for accruals related to standard and extended product warranties issued during the reporting period.

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Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

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Amount as of the balance sheet date of the aggregate standard product warranty liability that is expected to be paid within one year or the normal operating cycle, if longer. Does not include the balance for the extended product warranty liability.

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Amount as of the balance sheet date of the aggregate standard product warranty liability that is expected to be paid after one year or beyond the normal operating cycle, if longer. Does not include the balance for the extended product warranty liability.

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Represents the aggregate decrease in the liability for payments made (in cash or in kind) to satisfy claims under the terms of the standard product warranty. Does not include any Increase or Decrease in the liability for payments related to 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 product warranties (including adjustments related to changes in estimates). Does not include any Increase or Decrease in the liability for accruals related to extended product warranties.

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