Financial Results in Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of tax			$ 292	$ (1,904)
ASC group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales		0		2,727
Income (loss) before income tax provision		0		180
Income tax provision (benefit)		0		48
Income (loss) from operations, net of tax		0		132
Gain (loss) on sale of discontinued operations, net of tax		(34)		2,328
Income (loss) from discontinued operations, net of tax		(34)		2,460
Repair group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	0	1,590	1,339	2,846
Income (loss) before income tax provision	(136)	(495)	(467)	(937)
Income tax provision (benefit)	(51)	(195)	(175)	(381)
Income (loss) from discontinued operations, net of tax	$ (85)	$ (300)	$ (292)	$ (556)