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Pension and Retirement Plans (Detail) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of Years Defined Benefit Plans are Closed to Newly Hired Employees	2 years
Number of Years Supplementary Retirement Plans are Closed to Newly Hired Employees	2 years
Accumulated other comprehensive income	$ 3,710,000	$ 4,339,000
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	62,000
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	700,000
Defined Benefit Plan, Fair Value of Plan Assets	9,473,000	8,914,000
Contributions in Defined Contribution Plans	185,000	172,000
Domestic Supplemental Retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Loans, Gross, Insurance Policy	$ 1,800,000	$ 1,800,000

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Amount of contributions paid by the Company into defined contributions expense

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Number of years that all of the Company's defined benefit plans are closed to newly hired employees.

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Number of years that the Company's supplementary retirement plans are closed to newly hired employees.

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The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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- Definition

The aggregate amount in accumulated other comprehensive income expected to be recognized as a component of net periodic benefit cost over the fiscal year that follows the most recent annual statement of financial position presented, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.

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- Definition

The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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- Definition

Gross amount of loans made to policy and contract holders using their life insurance contracts' cash value or separate accounts as collateral.

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-Number 210

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-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

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