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Detail Of Selected Balance Sheet Accounts (Details) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Detail Of Selected Balance Sheet Accounts [Abstract]
Warranty expense	$ 1,000,000
Depreciation expense	$ 10,465,000	$ 10,598,000	$ 9,154,000

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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