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Retirement Benefit Plans (Tables)
 12 Months Ended
Sep. 30, 2020
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,
 20202019
Service cost$341 $299 
Interest cost832 1,055 
Expected return on plan assets(1,453)(1,573)
Amortization of net loss752 429 
Settlement cost239 246 
Net pension expense for defined benefit plans$711 $456 
Roll Forward of Defined Benefit Pension Plan Obligations and Assets
The status of all defined benefit pension plans at September 30 is as follows:
20202019
Benefit obligations:
Benefit obligations at beginning of year$30,548 $27,437 
Service cost341 299 
Interest cost832 1,055 
Actuarial loss2,037 3,691 
Benefits paid(1,965)(1,914)
Currency translation— (20)
Benefit obligations at end of year$31,793 $30,548 
Plan assets:
Plan assets at beginning of year$20,970 $22,052 
Actual return on plan assets1,930 622 
Employer contributions674 210 
Benefits paid(1,965)(1,914)
Plan assets at end of year$21,609 $20,970 
Net Plan Assets Recognized in the Consolidated Balance Sheets
 Plans in which
Benefit Obligations
Exceed Assets at
September 30,
 20202019
Reconciliation of funded status:
Plan assets less than projected benefit obligations$(10,211)$(9,574)
Amounts recognized in accumulated other comprehensive loss:
Net loss11,973 11,404 
Net amount recognized in the consolidated balance sheets$1,762 $1,830 
Amounts recognized in the consolidated balance sheets are:
Accrued liabilities(46)(46)
Pension liability(10,165)(9,528)
Accumulated other comprehensive loss – pretax11,973 11,404 
Net amount recognized in the consolidated balance sheets$1,762 $1,830 
Amounts in Accumulated Other Comprehensive Loss Expected to be Recognized as Components of Net Periodic Benefit Costs
The amounts in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit costs during fiscal 2021 are as follows: 
Plans in which
Assets Exceed
Benefit
Obligations		Plans in which
Benefit
Obligations
Exceed Assets
Net loss$— $844 
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,
 20202019
Discount rate for liabilities2.3 %2.9 %
Discount rate for expenses2.9 %4.2 %
Expected return on assets7.2 %7.5 %
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, 2020 and 2019:
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 
September 30, 2019Asset
Amount		Level 2Level 3
U.S. equity securities:
Large value$435 $435 $— 
Large blend9,368 9,368 — 
Large growth625 625 — 
Mid blend163 163 — 
Small blend159 159 — 
Non-U.S. equity securities:
Foreign large blend1,607 1,607 — 
Diversified emerging markets17 17 — 
U.S. debt securities:
Inflation protected bond1,100 1,100 — 
Intermediate term bond6,974 4,969 2,005 
High inflation bond173 173 — 
Non-U.S. debt securities:
Emerging markets bonds106 106 — 
Stable value:
Short-term bonds243 243 — 
Total plan assets at fair value$20,970 $18,965 $2,005 
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
 20202019
U.S. equities51 %51 %
30% to 70%
Non-U.S. equities8 %8 %
0% to 20%
U.S. debt securities40 %39 %
20% to 70%
Non-U.S. debt securities— %1 %
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, 2020 and 2019 were as follows:
20202019
Balance at beginning of year$2,005 $1,815 
Actual return on plan assets128 190 
Purchases and sales of plan assets, net(35)— 
Balance at end of year$2,098 $2,005 
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
2021$2,332 
20221,884 
20231,886 
20241,836 
20251,926 
2026-20308,432 
Schedule of Contributions in U.S. Multi-Employer Retirement Plan for Certain Union Employees
The Company contributes to one (1) U.S. multi-employer retirement plan for certain union employees, as follow:
Pension
Fund		Pension Protection Act Zone StatusFIP/RP Status
Pending/
Implemented		Contributions by the CompanySurcharge
Imposed		Expiration of
Collective
Bargaining
Agreement
2020201920202019
Fund ¹N/ARedImplemented$— $55 Yes5/31/2020
 
¹ The fund is the IAM National Pension Fund – EIN 51-6031295 / Plan number 2. The IAM National Pension Fund ("IAM plan") utilized the special 30-year amortization provided by Public law 111-192, section 211 to amortize its losses from 2008.