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Retirement Benefit Plans (Tables)
 12 Months Ended
Sep. 30, 2021
Retirement Benefits [Abstract]  
Net Pension Expense for Defined Benefit Plans Net pension expense, benefit obligations and plan assets for the Company-sponsored defined benefit pension plans consists of the following:
 Years Ended
 September 30,
 20212020
Service cost$131 $341 
Interest cost699 832 
Expected return on plan assets(1,421)(1,453)
Amortization of net loss846 752 
Settlement cost274 239 
Net pension expense for defined benefit plans$529 $711 
Roll Forward of Defined Benefit Pension Plan Obligations and Assets
The status of all defined benefit pension plans at September 30 is as follows:
20212020
Benefit obligations:
Benefit obligations at beginning of year$31,793 $30,548 
Service cost131 341 
Interest cost699 832 
Actuarial (gain) loss(967)2,037 
Benefits paid(2,349)(1,965)
Currency translation23 — 
Benefit obligations at end of year$29,330 $31,793 
Plan assets:
Plan assets at beginning of year$21,609 $20,970 
Actual return on plan assets3,825 1,930 
Employer contributions126 674 
Benefits paid(2,349)(1,965)
Plan assets at end of year$23,211 $21,609 
Net Plan Assets Recognized in the Consolidated Balance Sheets
 Plans in which
Benefit Obligations
Exceed Assets at
September 30,
 20212020
Reconciliation of funded status:
Plan assets less than projected benefit obligations$(6,119)$(10,211)
Amounts recognized in accumulated other comprehensive loss:
Net loss7,482 11,973 
Net amount recognized in the consolidated balance sheets$1,363 $1,762 
Amounts recognized in the consolidated balance sheets are:
Accrued liabilities(46)(46)
Pension liability(6,073)(10,165)
Accumulated other comprehensive loss – pretax7,482 11,973 
Net amount recognized in the consolidated balance sheets$1,363 $1,762 
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,
 20212020
Discount rate for liabilities2.6 %2.3 %
Discount rate for expenses3.1 %2.9 %
Expected return on assets7.0 %7.2 %
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, 2021 and 2020:
September 30, 2021Asset
Amount		Level 2Level 3
U.S. equity securities:
Large value$514 $514 $— 
Large blend10,227 10,227 — 
Large growth519 519 — 
Mid blend223 223 — 
Small blend697 697 — 
Non-U.S. equity securities:
Foreign large blend1,807 1,807 — 
Diversified emerging markets86 86 — 
U.S. debt securities:
Inflation protected bond1,087 1,087 — 
Intermediate term bond7,396 5,288 2,108 
High inflation bond189 189 — 
Non-U.S. debt securities:
Emerging markets bonds164 164 — 
Stable value:
Short-term bonds302 302 — 
Total plan assets at fair value$23,211 $21,103 $2,108 
September 30, 2020Asset
Amount		Level 2Level 3
U.S. equity securities:
Large value$175 $175 $— 
Large blend9,334 9,334 — 
Large growth1,109 1,109 — 
Mid blend176 176 — 
Small blend224 224 — 
Non-U.S. equity securities:
Foreign large blend1,603 1,603 — 
Diversified emerging markets50 50 — 
U.S. debt securities:
Inflation protected bond1,028 1,028 — 
Intermediate term bond7,479 5,381 2,098 
High inflation bond178 178 — 
Non-U.S. debt securities:
Emerging markets bonds106 106 — 
Stable value:
Short-term bonds147 147 — 
Total plan assets at fair value$21,609 $19,511 $2,098 
The “Asset Allocation Range” listed below anticipates these potential scenarios and provides flexibility for the Plan’s 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
 20212020
U.S. equities53 %51 %
30% to 70%
Non-U.S. equities8 %8 %
0% to 20%
U.S. debt securities37 %40 %
20% to 70%
Non-U.S. debt securities1 %— %
0% to10%
Other securities1 %1 %
0% to 60%
Total100 %100 %
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, 2021 and 2020 were as follows:

20212020
Balance at beginning of year$2,098 $2,005 
Actual return on plan assets52 128 
Purchases and sales of plan assets, net(42)(35)
Balance at end of year$2,108 $2,098 
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
2022$2,188 
20231,813 
20241,844 
20251,924 
20261,793 
2027-20318,251