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Retirement Benefit Plans (Tables)
 12 Months Ended
Sep. 30, 2024
Retirement Benefits [Abstract]  
Schedule of Net Pension Expense for Defined Benefit Plans Net pension expense, benefit obligations and plan assets for the Company-sponsored defined benefit pension plans consist of the following:
 Years Ended
 September 30,
 20242023
Service cost$181 $24 
Interest cost1,072 1,090 
Expected return on plan assets(1,046)(1,101)
Amortization of net loss143 319 
Settlement cost60 108 
Net pension expense for defined benefit plans (non-operating expense)$410 $440 
Schedule of Roll Forward of Defined Benefit Pension Plan Obligations and Assets
The status of all defined benefit pension plans at September 30 is as follows:
20242023
Benefit obligations:
Benefit obligations at beginning of year$20,345 $22,492 
Service cost181 24 
Interest cost1,072 1,090 
Actuarial loss (gain)1,313 (1,463)
Benefits paid(2,023)(1,798)
Benefit obligations at end of year$20,888 $20,345 
Plan assets:
Plan assets at beginning of year$17,194 $17,937 
Actual return on plan assets3,076 979 
Employer contributions129 77 
Benefits paid(2,023)(1,799)
Plan assets at end of year$18,376 $17,194 
Underfunded status at end of year$(2,512)$(3,151)
Schedule of Net Plan Assets Recognized in the Consolidated Balance Sheets
 Plans in which
Benefit Obligations
Exceed Assets at
September 30,
 20242023
Reconciliation of funded status:
Plan assets less than projected benefit obligations$(2,512)$(3,151)
Amounts recognized in accumulated other comprehensive loss:
Net loss3,599 4,504 
Net amount recognized in the consolidated balance sheets$1,087 $1,353 
Amounts recognized in the consolidated balance sheets are:
Accrued liabilities(47)(46)
Pension liability(2,465)(3,105)
Accumulated other comprehensive loss – pretax3,599 4,504 
Net amount recognized in the consolidated balance sheets$1,087 $1,353 
Schedule of Weighted-Average Assumptions Used in Developing Benefit Obligation and Net Pension Expense
Where applicable, the following weighted-average assumptions were used in developing the benefit obligation and the net pension expense for defined benefit pension plans:
 Years Ended September 30,
 20242023
Discount rate for liabilities4.8 %5.6 %
Discount rate for expenses5.7 %5.1 %
Expected return on assets6.2 %6.2 %
Schedule of Fair Values and Asset Allocation Ranges of Defined Benefit Plan Investments
The following tables set forth the asset allocation of the Company’s defined benefit pension plan assets and summarize the fair values and levels within the fair value hierarchy for such plan assets as of September 30, 2024 and 2023:
September 30, 2024Asset
Amount		Level 1
U.S. equity securities:
Large blend$3,796 $3,796 
Large growth1,458 1,458 
Mid blend775 775 
Small growth633 633 
Non-U.S. equity securities:
Foreign large blend770 770 
Diversified emerging markets338 338 
Global equity securities702 702 
U.S. debt securities:
Intermediate term bond5,764 5,764 
Multi-sector bond3,697 3,697 
Stable value:
Cash or money market443 443 
Total plan assets at fair value$18,376 $18,376 
September 30, 2023Asset
Amount		Level 1
U.S. equity securities:
Large value$879 $879 
Large blend3,124 3,124 
Large growth1,060 1,060 
Mid blend599 599 
Small blend499 499 
Non-U.S. equity securities:
Foreign large blend615 615 
Diversified emerging markets272 272 
Global equity securities577 577 
U.S. debt securities:
Intermediate term bond5,676 5,676 
High inflation bond2,044 2,044 
Stable value:
Short-term bonds1,849 1,849 
Total plan assets at fair value$17,194 $17,194 
The “Asset Allocation Range” listed below anticipates these potential scenarios and provides flexibility for the plans’ investments to vary around the objective without triggering a reallocation of the assets, as noted by the following:
 Percent of Plan Assets at
September 30,		Asset
Allocation
Range
 20242023
U.S. equities36 %36 %
30% to 70%
Non-U.S. equities10 %8 %
0% to 20%
U.S. debt securities52 %45 %
20% to 70%
Non-U.S. debt securities— %— %
0% to10%
Other securities2 %11 %
0% to 60%
Total100 %100 %
Schedule of Changes in the Fair Value of Level 3 Defined Benefit Plan Investments
Changes in the fair value of the Company’s Level 3 investments during the years ending September 30, 2024 and 2023 were as follows:
20242023
Balance at beginning of year$— $1,829 
Actual return on plan assets— 94 
Purchases and sales of plan assets, net— (1,923)
Balance at end of year$— $— 
Schedule of Projected Future Defined Benefit Plan Payments
The following defined benefit payment amounts are expected to be made in the future:
Years Ending
September 30,
Projected
Benefit Payments
2025$2,411 
20261,725 
20271,611 
20281,574 
20291,501 
2030-20337,316