Financial Results in Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 2,727	$ 3,784
Income before income tax provision	180	517
Provision for income taxes on operations	48	164
Income from operations, net of tax	132	353
Gain on sale of discontinued operations	4,014	0
Provision for income taxes on gain on sale	1,652	0
Gain on sale of discontinued operations, net of tax	2,362	0
Income from discontinued operations, net of tax	$ 2,494	$ 353