Components of Balance Sheet Accounts Classified as Assets and Liabilities Held for Sale (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Assets:
Total current assets of business held for sale	$ 2,059	$ 2,581
Total noncurrent assets of business held for sale	1,150	1,232
Liabilities:
Total current liabilities of business held for sale	1,086	239
Repair Group [Member]
Assets:
Receivables, net	1,067	1,365
Inventories, net	660	881
Deferred income taxes	317	329
Prepaid expenses and other current assets	15	6
Total current assets of business held for sale	2,059	2,581
Property, plant and equipment, net	1,118	1,232
Other assets	32	0
Total noncurrent assets of business held for sale	1,150	1,232
Liabilities:
Accounts payable	278	120
Accrued liabilities	808	119
Total current liabilities of business held for sale	1,086	239
ASC [Member]
Assets:
Receivables, net		2,574
Inventories, net		1,224
Deferred income taxes		16
Prepaid expenses and other current assets		100
Total current assets of business held for sale		3,914
Property, plant and equipment, net		2,533
Other assets		43
Total noncurrent assets of business held for sale		2,576
Liabilities:
Current maturities of long-term debt		2
Accounts payable		546
Accrued liabilities		623
Total current liabilities of business held for sale		1,171
Deferred income taxes		846
Other long-term liabilities		1
Total noncurrent liabilities of business held for sale		$ 847