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Note 10 - Warranty Costs (Detail) - Changes In Warranty Accrual (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Warranty accrual, beginning of the period	$ 15,514	$ 17,572
Warranty costs accrued during the period	414	334
Warranty costs paid during the period	(796)	(938)
Warranty accrual, end of the period	$ 15,132	$ 16,968

- 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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