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Warranties (Product Warranty Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Warranties
Balance at December 31, 2011	$ 21,642
Warranty claims	(10,164)
Warranty accruals	10,163
Balance at March 31, 2012	$ 21,641

- Definition

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.

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