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Retirement Benefits (Tables) | 12 Months Ended
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Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Amount of Expense Associated with Defined Contribution Plans | The amount of expense associated with defined contribution plans was as follows:
|  | Year Ended September 30, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Company costs |  | $ | 40,898 |  |  | $ | 33,717 |  |  | $ | 33,769 |
Defined Benefit Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Net Periodic Benefit Costs | Net periodic benefit costs consist of the following components reflected as expense in Woodward’s Consolidated Statement of Earnings:
|  | Year Ended September 30, |
|  | United States |  |  | Other Countries |  |  | Total |
|  | 2022 |  |  | 2021 |  |  | 2020 |  |  | 2022 |  |  | 2021 |  |  | 2020 |  |  | 2022 |  |  | 2021 |  |  | 2020 |
Service cost |  | $ | 1,554 |  |  | $ | 1,729 |  |  | $ | 1,659 |  |  | $ | 2,339 |  |  | $ | 2,922 |  |  | $ | 2,865 |  |  | $ | 3,893 |  |  | $ | 4,651 |  |  | $ | 4,524 |
Interest cost |  |  | 5,281 |  |  |  | 4,957 |  |  |  | 5,590 |  |  |  | 1,612 |  |  |  | 1,361 |  |  |  | 1,278 |  |  |  | 6,893 |  |  |  | 6,318 |  |  |  | 6,868 |
Expected return on plan assets |  |  | (10,853 | ) |  |  | (14,144 | ) |  |  | (12,346 | ) |  |  | (2,434 | ) |  |  | (2,482 | ) |  |  | (2,827 | ) |  |  | (13,287 | ) |  |  | (16,626 | ) |  |  | (15,173 | )
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net losses |  |  | 259 |  |  |  | 541 |  |  |  | 1,430 |  |  |  | 555 |  |  |  | 931 |  |  |  | 1,046 |  |  |  | 814 |  |  |  | 1,472 |  |  |  | 2,476 |
Net prior service cost |  |  | 981 |  |  |  | 969 |  |  |  | 936 |  |  |  | 23 |  |  |  | 25 |  |  |  | 23 |  |  |  | 1,004 |  |  |  | 994 |  |  |  | 959 |
Net periodic (benefit) cost |  | $ | (2,778 | ) |  | $ | (5,948 | ) |  | $ | (2,731 | ) |  | $ | 2,095 |  |  | $ | 2,757 |  |  | $ | 2,385 |  |  | $ | (683 | ) |  | $ | (3,191 | ) |  | $ | (346 | )
Schedule of Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan | The following tables provide a reconciliation of the changes in the projected benefit obligation and fair value of assets for the defined benefit pension plans:
|  | At or for the Year Ended September 30, |
|  | United States |  |  | Other Countries |  |  | Total |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Changes in projected benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Projected benefit obligation at beginning of year |  | $ | 177,346 |  |  | $ | 184,077 |  |  | $ | 122,018 |  |  | $ | 123,546 |  |  | $ | 299,364 |  |  | $ | 307,623 |
Plan amendment |  |  | — |  |  |  | 611 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 611 |
Service cost |  |  | 1,554 |  |  |  | 1,729 |  |  |  | 2,339 |  |  |  | 2,922 |  |  |  | 3,893 |  |  |  | 4,651 |
Interest cost |  |  | 5,281 |  |  |  | 4,957 |  |  |  | 1,612 |  |  |  | 1,361 |  |  |  | 6,893 |  |  |  | 6,318 |
Net actuarial losses (gains) |  |  | (43,639 | ) |  |  | (6,496 | ) |  |  | (40,968 | ) |  |  | (3,459 | ) |  |  | (84,607 | ) |  |  | (9,955 | )
Contribution by participants |  |  | — |  |  |  | — |  |  |  | 10 |  |  |  | 10 |  |  |  | 10 |  |  |  | 10 |
Benefits paid |  |  | (8,098 | ) |  |  | (7,532 | ) |  |  | (3,487 | ) |  |  | (3,782 | ) |  |  | (11,585 | ) |  |  | (11,314 | )
Foreign currency exchange rate changes |  |  | — |  |  |  | — |  |  |  | (16,047 | ) |  |  | 1,420 |  |  |  | (16,047 | ) |  |  | 1,420 |
Projected benefit obligation at end of year |  | $ | 132,444 |  |  | $ | 177,346 |  |  | $ | 65,477 |  |  | $ | 122,018 |  |  | $ | 197,921 |  |  | $ | 299,364 |
Changes in fair value of plan assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year |  | $ | 221,263 |  |  | $ | 201,555 |  |  | $ | 69,844 |  |  | $ | 65,154 |  |  | $ | 291,107 |  |  | $ | 266,709 |
Actual return on plan assets |  |  | (58,684 | ) |  |  | 27,240 |  |  |  | (9,822 | ) |  |  | 4,675 |  |  |  | (68,506 | ) |  |  | 31,915 |
Contributions by the Company |  |  | — |  |  |  | — |  |  |  | 2,370 |  |  |  | 2,185 |  |  |  | 2,370 |  |  |  | 2,185 |
Contributions by plan participants |  |  | — |  |  |  | — |  |  |  | 10 |  |  |  | 10 |  |  |  | 10 |  |  |  | 10 |
Benefits paid |  |  | (8,098 | ) |  |  | (7,532 | ) |  |  | (3,487 | ) |  |  | (3,782 | ) |  |  | (11,585 | ) |  |  | (11,314 | )
Foreign currency exchange rate changes |  |  | — |  |  |  | — |  |  |  | (11,336 | ) |  |  | 1,602 |  |  |  | (11,336 | ) |  |  | 1,602 |
Fair value of plan assets at end of year |  | $ | 154,481 |  |  | $ | 221,263 |  |  | $ | 47,579 |  |  | $ | 69,844 |  |  | $ | 202,060 |  |  | $ | 291,107 |
Net over/(under) funded status at end of year |  | $ | 22,037 |  |  | $ | 43,917 |  |  | $ | (17,898 | ) |  | $ | (52,174 | ) |  | $ | 4,139 |  |  | $ | (8,257 | )
Schedule of Accumulated Benefit Obligations In Excess of and Less Than Fair Value of Plan Assets |
|  | Plans with accumulated benefit obligation in excess of plan assets |  |  | Plans with accumulated benefit obligation less than plan assets |
|  | At September 30, |  |  | At September 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Projected benefit obligation |  | $ | (48,371 | ) |  | $ | (112,302 | ) |  | $ | (149,550 | ) |  | $ | (187,062 | )
Accumulated benefit obligation |  |  | (48,354 | ) |  |  | (111,151 | ) |  |  | (148,571 | ) |  |  | (186,245 | )
Fair value of plan assets |  |  | 18,459 |  |  |  | 57,945 |  |  |  | 183,601 |  |  |  | 233,161 |
Schedule of Amounts Recognized in Balance Sheet and Other Comprehensive Income (Loss) | The following tables provide the amounts recognized in the statement of financial position and accumulated other comprehensive losses for the defined benefit pension plans:
|  | Year Ended September 30, |
|  | United States |  |  | Other Countries |  |  | Total |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Amounts recognized in statement of financial position consist of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other non-current assets |  | $ | 24,159 |  |  | $ | 43,917 |  |  | $ | 9,892 |  |  | $ | 2,182 |  |  | $ | 34,051 |  |  | $ | 46,099 |
Accrued liabilities |  |  | — |  |  |  | — |  |  |  | (976 | ) |  |  | (1,017 | ) |  |  | (976 | ) |  |  | (1,017 | )
Other non-current liabilities |  |  | (2,122 | ) |  |  | — |  |  |  | (26,814 | ) |  |  | (53,339 | ) |  |  | (28,936 | ) |  |  | (53,339 | )
Net over/(under) funded status at end of year |  | $ | 22,037 |  |  | $ | 43,917 |  |  | $ | (17,898 | ) |  | $ | (52,174 | ) |  | $ | 4,139 |  |  | $ | (8,257 | )
Amounts recognized in accumulated other comprehensive income consist of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized net prior service cost |  | $ | 3,475 |  |  | $ | 4,455 |  |  | $ | 462 |  |  | $ | 584 |  |  | $ | 3,937 |  |  | $ | 5,039 |
Unrecognized net losses (gains) |  |  | 14,822 |  |  |  | (10,816 | ) |  |  | (5,459 | ) |  |  | 24,860 |  |  |  | 9,363 |  |  |  | 14,044 |
Total amounts recognized |  |  | 18,297 |  |  |  | (6,361 | ) |  |  | (4,997 | ) |  |  | 25,444 |  |  |  | 13,300 |  |  |  | 19,083 |
Deferred taxes |  |  | (7,801 | ) |  |  | (1,691 | ) |  |  | (697 | ) |  |  | (7,785 | ) |  |  | (8,498 | ) |  |  | (9,476 | )
Amounts recognized in accumulated other comprehensive income |  | $ | 10,496 |  |  | $ | (8,052 | ) |  | $ | (5,694 | ) |  | $ | 17,659 |  |  | $ | 4,802 |  |  | $ | 9,607 |
Schedule of Changes in Plan Assets and Benefit Obligations Recorded in Other Comprehensive Income (Loss) | The following table reconciles the changes in accumulated other comprehensive losses for the defined benefit pension plans:
|  | Year Ended September 30, |
|  | United States |  |  | Other Countries |  |  | Total |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Accumulated other comprehensive losses at beginning of year |  | $ | (6,361 | ) |  | $ | 14,131 |  |  | $ | 25,444 |  |  | $ | 31,377 |  |  | $ | 19,083 |  |  | $ | 45,508 |
Net loss (gain) |  |  | 25,898 |  |  |  | (19,593 | ) |  |  | (28,712 | ) |  |  | (5,832 | ) |  |  | (2,814 | ) |  |  | (25,425 | )
Prior service cost due to plan amendment |  |  | — |  |  |  | 611 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 611 |
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net losses |  |  | (259 | ) |  |  | (541 | ) |  |  | (555 | ) |  |  | (931 | ) |  |  | (814 | ) |  |  | (1,472 | )
Prior service cost |  |  | (981 | ) |  |  | (969 | ) |  |  | (23 | ) |  |  | (25 | ) |  |  | (1,004 | ) |  |  | (994 | )
Foreign currency exchange rate changes |  |  | — |  |  |  | — |  |  |  | (1,151 | ) |  |  | 855 |  |  |  | (1,151 | ) |  |  | 855 |
Accumulated other comprehensive losses at end of year |  | $ | 18,297 |  |  | $ | (6,361 | ) |  | $ | (4,997 | ) |  | $ | 25,444 |  |  | $ | 13,300 |  |  | $ | 19,083 |
Schedule of Expected Benefit Payments | Pension benefit payments are made from the assets of the pension plans. The German pension plans are unfunded; therefore, benefit payments are made from Company contributions into these plans as required to meet the payment obligations. Using foreign exchange rates as of September 30, 2022 and expected future service assumptions, it is anticipated that the future benefit payments will be as follows:
Year Ending September 30, |  | United States |  |  | Other Countries |  |  | Total |
2023 |  | $ | 8,839 |  |  | $ | 3,184 |  |  | $ | 12,023 |
2024 |  |  | 9,310 |  |  |  | 3,083 |  |  |  | 12,393 |
2025 |  |  | 9,673 |  |  |  | 3,060 |  |  |  | 12,733 |
2026 |  |  | 9,967 |  |  |  | 3,069 |  |  |  | 13,036 |
2027 |  |  | 10,235 |  |  |  | 3,180 |  |  |  | 13,415 |
2028 – 2032 |  |  | 52,807 |  |  |  | 19,239 |  |  |  | 72,046 |
Schedule of Allocation of Plan Assets, Actual and Target Allocations | The asset allocations are monitored and rebalanced regularly by investment managers assigned to the individual pension plans. The actual allocations of pension plan assets and target allocation ranges by asset class, are as follows:
|  | At September 30, |
|  | 2022 |  |  | 2021 |
|  | Percentage of Plan Assets |  |  | Target Allocation Ranges |  |  | Percentage of Plan Assets |  |  | Target Allocation Ranges |
United States: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Class |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Securities |  | 29.5% |  |  | 2.4% |  |  |  | — |  |  | 51.2% |  |  | 30.7% |  |  | 2.5% |  |  |  | — |  |  | 51.2% |
Debt Securities |  | 69.0% |  |  | 58.8% |  |  |  | — |  |  | 87.6% |  |  | 67.7% |  |  | 58.8% |  |  |  | — |  |  | 87.5% |
Other |  | 1.5% |  |  | 0.0% |  |  | 1.6% |  |  | 0.0% |
|  | 100.0% |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.0% |  |  |  |  |  |  |  |  |  |  |  |  |
United Kingdom: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Class |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Securities |  | 46.2% |  |  | 50.0% |  |  |  | — |  |  | 90.0% |  |  | 42.3% |  |  | 50.0% |  |  |  | — |  |  | 90.0% |
Debt Securities |  | 52.3% |  |  | 45.0% |  |  |  | — |  |  | 70.0% |  |  | 57.3% |  |  | 45.0% |  |  |  | — |  |  | 70.0% |
Other |  | 1.5% |  |  | 0.0% |  |  | 0.4% |  |  | 0.0% |
|  | 100.0% |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.0% |  |  |  |  |  |  |  |  |  |  |  |  |
Japan: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset Class |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Securities |  | 39.9% |  |  | 36.0% |  |  |  | — |  |  | 44.0% |  |  | 40.3% |  |  | 36.0% |  |  |  | — |  |  | 44.0% |
Debt Securities |  | 60.1% |  |  | 55.0% |  |  |  | — |  |  | 63.0% |  |  | 58.8% |  |  | 55.0% |  |  |  | — |  |  | 63.0% |
Other |  | 0.0% |  |  | 0.0% |  |  |  | — |  |  | 2.0% |  |  | 0.9% |  |  | 0.0% |  |  |  | — |  |  | 2.0% |
|  | 100.0% |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.0% |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Allocation of Plan Assets, Fair Value Hierarchy | The following tables present Woodward’s pension plan assets using the fair value hierarchy established by U.S. GAAP:
|  | At September 30, 2022 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  |  |  |
|  | United States |  |  | Other Countries |  |  | United States |  |  | Other Countries |  |  | United States |  |  | Other Countries |  |  | Total |
Asset Category: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 2,265 |  |  | $ | 467 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 2,732 |
Mutual funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. corporate bond fund |  |  | 106,653 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 106,653 |
U.S. equity large cap fund |  |  | 28,088 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 28,088 |
International equity large cap growth fund |  |  | 17,475 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 17,475 |
Pooled funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Japanese equity securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,775 |  |  |  | — |  |  |  | — |  |  |  | 1,775 |
International equity securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,610 |  |  |  | — |  |  |  | — |  |  |  | 1,610 |
Japanese fixed income securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3,875 |  |  |  | — |  |  |  | — |  |  |  | 3,875 |
International fixed income securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,325 |  |  |  | — |  |  |  | — |  |  |  | 1,325 |
Global target return equity/bond fund |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 11,533 |  |  |  | — |  |  |  | — |  |  |  | 11,533 |
Index linked U.K. equity fund |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,253 |  |  |  | — |  |  |  | — |  |  |  | 2,253 |
Index linked international equity fund |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 4,271 |  |  |  | — |  |  |  | — |  |  |  | 4,271 |
Index linked U.K. corporate bonds fund |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 12,124 |  |  |  | — |  |  |  | — |  |  |  | 12,124 |
Index linked U.K. government securities fund |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3,701 |  |  |  | — |  |  |  | — |  |  |  | 3,701 |
Index linked U.K. long-term government securities fund |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 4,645 |  |  |  | — |  |  |  | — |  |  |  | 4,645 |
Total assets |  | $ | 154,481 |  |  | $ | 467 |  |  | $ | — |  |  | $ | 47,112 |  |  | $ | — |  |  | $ | — |  |  | $ | 202,060 |
|  | At September 30, 2021 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  |  |  |
|  | United States |  |  | Other Countries |  |  | United States |  |  | Other Countries |  |  | United States |  |  | Other Countries |  |  | Total |
Asset Category: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 3,508 |  |  | $ | 324 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 3,832 |
Mutual funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. corporate bond fund |  |  | 149,727 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 149,727 |
U.S. equity large cap fund |  |  | 41,988 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 41,988 |
International equity large cap growth fund |  |  | 26,040 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 26,040 |
Pooled funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Japanese equity securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,610 |  |  |  | — |  |  |  | — |  |  |  | 2,610 |
International equity securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,180 |  |  |  | — |  |  |  | — |  |  |  | 2,180 |
Japanese fixed income securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 5,224 |  |  |  | — |  |  |  | — |  |  |  | 5,224 |
International fixed income securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,775 |  |  |  | — |  |  |  | — |  |  |  | 1,775 |
Global target return equity/bond fund |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 15,201 |  |  |  | — |  |  |  | — |  |  |  | 15,201 |
Index linked U.K. equity fund |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3,236 |  |  |  | — |  |  |  | — |  |  |  | 3,236 |
Index linked international equity fund |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 6,093 |  |  |  | — |  |  |  | — |  |  |  | 6,093 |
Index linked U.K. corporate bonds fund |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 18,438 |  |  |  | — |  |  |  | — |  |  |  | 18,438 |
Index linked U.K. government securities fund |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 6,047 |  |  |  | — |  |  |  | — |  |  |  | 6,047 |
Index linked U.K. long-term government securities fund |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 8,716 |  |  |  | — |  |  |  | — |  |  |  | 8,716 |
Total assets |  | $ | 221,263 |  |  | $ | 324 |  |  | $ | — |  |  | $ | 69,520 |  |  | $ | — |  |  | $ | — |  |  | $ | 291,107 |
Other Postretirement Benefit Plans [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Actuarial Assumptions Used | The actuarial assumptions used in measuring the net periodic benefit cost and plan obligations of postretirement benefits were as follows:
|  | At September 30, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Weighted-average discount rate used to determine benefit obligation |  |  | 5.70 | % |  |  | 2.80 | % |  |  | 2.45 | %
Weighted-average discount rate used to determine net periodic benefit cost |  |  | 2.80 |  |  |  | 2.45 |  |  |  | 3.05 |
Schedule of Net Periodic Benefit Costs | Net periodic benefit costs consist of the following components reflected as expense in Woodward’s Consolidated Statements of Earnings:
|  | Year Ended September 30, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Service cost |  | $ | 1 |  |  | $ | 1 |  |  | $ | 2 |
Interest cost |  |  | 577 |  |  |  | 599 |  |  |  | 782 |
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |
Net (gain) loss |  |  | (94 | ) |  |  | 30 |  |  |  | 47 |
Net prior service cost (benefit) |  |  | — |  |  |  | 1 |  |  |  | 3 |
Net periodic cost |  | $ | 484 |  |  | $ | 631 |  |  | $ | 834 |
Schedule of Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan | The following table provides a reconciliation of the changes in the accumulated postretirement benefit obligation and fair value of assets for the postretirement benefits:
|  | Year Ended September 30, |
|  | 2022 |  |  | 2021 |
Changes in accumulated postretirement benefit obligation: |  |  |  |  |  |  |  |
Accumulated postretirement benefit obligation at beginning of year |  | $ | 21,544 |  |  | $ | 25,445 |
Service cost |  |  | 1 |  |  |  | 1 |
Interest cost |  |  | 577 |  |  |  | 599 |
Premiums paid by plan participants |  |  | 923 |  |  |  | 993 |
Net actuarial gains |  |  | (3,504 | ) |  |  | (2,422 | )
Benefits paid |  |  | (2,744 | ) |  |  | (3,072 | )
Accumulated postretirement benefit obligation at end of year |  | $ | 16,797 |  |  | $ | 21,544 |
Changes in fair value of plan assets: |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year |  | $ | — |  |  | $ | — |
Contributions by the company |  |  | 1,821 |  |  |  | 2,079 |
Premiums paid by plan participants |  |  | 923 |  |  |  | 993 |
Benefits paid |  |  | (2,744 | ) |  |  | (3,072 | )
Fair value of plan assets at end of year |  | $ | — |  |  | $ | — |
Funded status at end of year |  | $ | (16,797 | ) |  | $ | (21,544 | )
Schedule of Amounts Recognized in Balance Sheet and Other Comprehensive Income (Loss) | The following tables provide the amounts recognized in the statement of financial position and accumulated other comprehensive losses for the postretirement plans:
|  | Year Ended September 30, |
|  | 2022 |  |  | 2021 |
Amounts recognized in statement of financial position consist of: |  |  |  |  |  |  |  |
Accrued liabilities |  | $ | (1,803 | ) |  | $ | (1,808 | )
Other non-current liabilities |  |  | (14,994 | ) |  |  | (19,736 | )
Funded status at end of year |  | $ | (16,797 | ) |  | $ | (21,544 | )
Amounts recognized in accumulated other comprehensive income consist of: |  |  |  |  |  |  |  |
Unrecognized net prior service cost (benefit) |  | $ | - |  |  | $ | - |
Unrecognized net gains |  |  | (6,225 | ) |  |  | (2,815 | )
Total amounts recognized |  |  | (6,225 | ) |  |  | (2,815 | )
Deferred taxes |  |  | 1,247 |  |  |  | 289 |
Amounts recognized in accumulated other comprehensive income |  | $ | (4,978 | ) |  | $ | (2,526 | )
Schedule of Changes in Plan Assets and Benefit Obligations Recorded in Other Comprehensive Income (Loss) | The following table reconciles the changes in accumulated other comprehensive losses for the other postretirement benefit plans:
|  | Year Ended September 30, |
|  | 2022 |  |  | 2021 |
Accumulated other comprehensive losses at beginning of year |  | $ | (2,815 | ) |  | $ | (362 | )
Net gain |  |  | (3,504 | ) |  |  | (2,422 | )
Amortization of: |  |  |  |  |  |  |  |
Net gains (losses) |  |  | 94 |  |  |  | (30 | )
Prior service cost |  |  | — |  |  |  | (1 | )
Accumulated other comprehensive losses at end of year |  | $ | (6,225 | ) |  | $ | (2,815 | )
Schedule of Health Care Cost Trend Rates | Assumed healthcare cost trend rates at September 30, were as follows:
|  | 2022 |  |  | 2021 |
Health care cost trend rate assumed for next year |  |  | 6.00 | % |  |  | 6.00 | %
Rate to which the cost trend rate is assumed to decline |  |  |  |  |  |  |  |
(the ultimate trend rate) |  |  | 5.00 | % |  |  | 5.00 | %
Year that the rate reaches the ultimate trend rate |  | 2027 |  |  | 2027 |
Schedule of Future Postretirement Company Contributions | Using expected future service, it is anticipated that the future Company contributions to pay benefits for other postretirement benefit plans, excluding participate contributions, will be as follows:
Year Ending September 30, |  |  |  |
2023 |  | $ | 2,816 |
2024 |  |  | 2,765 |
2025 |  |  | 2,691 |
2026 |  |  | 2,602 |
2027 |  |  | 2,490 |
2028 – 2032 |  |  | 10,659 |
United States [Member] | Defined Benefit Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Actuarial Assumptions Used | The actuarial assumptions used in measuring the net periodic benefit cost and plan obligations of retirement pension benefits were as follows:
|  | At September 30, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
United States: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average assumptions to determine benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  | 5.70% |  |  | 3.05% |  |  | 2.75% |
Weighted-average assumptions to determine periodic benefit costs: |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  | 3.05 |  |  |  | 2.75 |  |  |  | 3.25 |
Long-term rate of return on plan assets |  |  | 5.00 |  |  |  | 7.15 |  |  |  | 7.39 |
United Kingdom | Defined Benefit Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Actuarial Assumptions Used |
|  | At September 30, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
United Kingdom: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average assumptions to determine benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  | 5.35% |  |  | 2.05% |  |  | 1.62% |
Rate of compensation increase |  |  | 4.00 |  |  |  | 3.80 |  |  |  | 3.30 |
Weighted-average assumptions to determine periodic benefit costs: |  |  |  |  |  |  |  |  |  |  |  |
Discount rate - service cost |  |  | 2.15 |  |  |  | 1.71 |  |  |  | 1.79 |
Discount rate - interest cost |  |  | 1.83 |  |  |  | 1.41 |  |  |  | 1.59 |
Rate of compensation increase |  |  | 4.00 |  |  |  | 3.30 |  |  |  | 3.50 |
Long-term rate of return on plan assets |  |  | 3.80 |  |  |  | 4.00 |  |  |  | 4.75 |
Japan | Defined Benefit Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Actuarial Assumptions Used |
|  | At September 30, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Japan: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average assumptions to determine benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  | 1.60% |  |  | 0.92% |  |  |  | 1.10 | %
Rate of compensation increase |  |  | 2.00 |  |  |  | 2.00 |  |  |  | 2.00 |
Weighted-average assumptions to determine periodic benefit costs: |  |  |  |  |  |  |  |  |  |  |  |
Discount rate - service cost |  |  | 1.13 |  |  |  | 1.33 |  |  |  | 0.72 |
Discount rate - interest cost |  |  | 0.65 |  |  |  | 0.74 |  |  |  | 0.31 |
Rate of compensation increase |  |  | 2.25 |  |  |  | 2.00 |  |  |  | 2.00 |
Long-term rate of return on plan assets |  |  | 2.00 |  |  |  | 2.00 |  |  |  | 2.50 |
Germany [Member] | Defined Benefit Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Actuarial Assumptions Used |
|  | At September 30, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Germany: |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average assumptions to determine benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  | 3.97 | % |  |  | 1.36 | % |  |  | 0.97 | %
Rate of compensation increase |  |  | 2.50 |  |  |  | 2.50 |  |  |  | 2.50 |
Weighted-average assumptions to determine periodic benefit costs: |  |  |  |  |  |  |  |  |  |  |  |
Discount rate - service cost |  |  | 1.54 |  |  |  | 1.11 |  |  |  | 1.01 |
Discount rate - interest cost |  |  | 1.06 |  |  |  | 0.76 |  |  |  | 0.56 |
Rate of compensation increase |  |  | 2.50 |  |  |  | 2.50 |  |  |  | 2.50 |

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