Discontinued Operations, Assets Held for Sale, and Business Divestiture - Financial Results in Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of tax			$ (736)	$ 292
Repair Group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	0	0	0	1,339
Income (loss) before income tax provision	1,259	(136)	1,160	(467)
Income tax (benefit) expense	460	(51)	424	(175)
Income (loss) from discontinued operations, net of tax	$ 799	$ (85)	$ 736	$ (292)