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Retirement Benefit Plans - Net Plan Assets Recognized in the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Reconciliation of funded status:
Plan assets less than projected benefit obligations	$ (2,512)	$ (3,151)
Amounts recognized in accumulated other comprehensive loss:
Net loss	3,599	4,504
Net amount recognized in the consolidated balance sheets	1,087	1,353
Amounts recognized in the consolidated balance sheets are:
Accumulated other comprehensive loss – pretax	3,599	4,504
Accrued liabilities
Amounts recognized in the consolidated balance sheets are:
Liabilities	(47)	(46)
Pension liability
Amounts recognized in the consolidated balance sheets are:
Liabilities	$ (2,465)	$ (3,105)

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- Definition

Defined benefit plan pension plans with accumulated benefit obligations in excess of plan aggregate benefit obligation accumulated other comprehensive income net gains losses after tax.

+ References

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- Definition

Defined benefit plans with benefit obligations in excess of plan assets aggregate benefit obligation accumulated other comprehensive income before tax.

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- Definition

Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans.

+ References

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- Definition

Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

+ References

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Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans.

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