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Product Warranty and Retrofit Activity on Gross Basis (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Product Liability Contingency [Line Items]
Beginning Balance	$ 7,329	$ 7,438
Adjustments for acquisitions and divestitures	962	7
Accruals	2,363	3,518
Settlements	(2,930)	(3,670)
Ending Balance	$ 7,724	$ 7,293

- 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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