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Income Taxes - Schedule of Income Taxes from Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Current provision:
Federal	$ 6,470	$ 6,048	$ 6,615
State and foreign	147	225	290
Total current provision	6,617	6,273	6,905
Deferred (benefit) provision :
Federal	(347)	(552)	(835)
State	(5)	60	107
Total deferred benefit	(352)	(492)	(728)
Income tax provision	$ 6,265	$ 5,781	$ 6,177

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.