Components of Balance Sheet Accounts Classified as Assets and Liabilities Held for Sale (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2012
Assets:
Receivables, net		$ 2,574
Inventories, net		1,188
Deferred income taxes		47
Prepaid expenses and other current assets		99
Total current assets of business held for sale	0	3,908
Property, plant and equipment, net		2,533
Other assets		43
Total noncurrent assets of business held for sale	0	2,576
Liabilities:
Current maturities of long-term debt		2
Accounts payable		546
Accrued liabilities		623
Total current liabilities of business held for sale	0	1,171
Deferred income taxes		388
Other long-term liabilities		2
Total noncurrent liabilities of business held for sale	$ 0	$ 390