Income Taxes - Schedule of Income Taxes from Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Current provision:
Federal	$ 6,048	$ 6,615	$ 6,011
State and foreign	225	290	765
Total current provision	6,273	6,905	6,776
Deferred (benefit) provision :
Federal	(552)	(835)	(652)
State	60	107	(520)
Total deferred benefit	(492)	(728)	(1,172)
Income tax provision	$ 5,781	$ 6,177	$ 5,604

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 other deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. For example, but not limited to, acquisition-date income tax benefits or expenses recognized from changes in the acquirer's valuation allowance for its previously existing deferred tax assets resulting from a business combination and adjustments to beginning-of-year balance of a valuation allowance because of a change in circumstance causing a change in judgment about the realizability of the related deferred tax asset in future periods.

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- Definition

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

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