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Warranties (Product Warranty Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Warranties
Balance at January 1,	$ 22,429	$ 19,637
Warranty claims	(46,779)	(44,791)
Warranty accruals	45,992	47,583
Balance at December 31,	$ 21,642	$ 22,429

- 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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