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Retirement Benefits (Tables) | 3 Months Ended
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Dec. 31, 2020
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:
|  | Three-Months Ended |
|  | December 31, |
|  | 2020 |  |  | 2019 |
Company costs |  | $ | 8,036 |  |  | $ | 8,704 |
Schedule of Estimated Remaining Cash Contributions | Woodward estimates its remaining cash contributions in fiscal year 2021 will be as follows:
Retirement pension benefits: |  |  |  |
United States |  | $ | — |
United Kingdom |  |  | 512 |
Japan |  |  | — |
Germany |  |  | 868 |
Other postretirement benefits |  |  | 3,075 |
Schedule of Amounts of Contributions Associated with Multiemployer Defined Benefit Plans | The amounts of contributions associated with the multiemployer defined benefit plans were as follows:
|  | Three-Months Ended |
|  | December 31, |
|  | 2020 |  |  | 2019 |
Company contributions |  | $ | 68 |  |  | $ | 70 |
Defined Benefit Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Net Periodic Benefit Costs | The components of the net periodic retirement pension costs recognized are as follows:
|  | Three-Months Ended December 31, |
|  | United States |  |  | Other Countries |  |  | Total |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Service cost |  | $ | 432 |  |  | $ | 415 |  |  | $ | 729 |  |  | $ | 710 |  |  | $ | 1,161 |  |  | $ | 1,125 |
Interest cost |  |  | 1,239 |  |  |  | 1,398 |  |  |  | 333 |  |  |  | 321 |  |  |  | 1,572 |  |  |  | 1,719 |
Expected return on plan assets |  |  | (3,536 | ) |  |  | (3,087 | ) |  |  | (602 | ) |  |  | (832 | ) |  |  | (4,138 | ) |  |  | (3,919 | )
Amortization of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net actuarial loss |  |  | 135 |  |  |  | 358 |  |  |  | 228 |  |  |  | 261 |  |  |  | 363 |  |  |  | 619 |
Prior service cost |  |  | 242 |  |  |  | 234 |  |  |  | 6 |  |  |  | 6 |  |  |  | 248 |  |  |  | 240 |
Net periodic retirement pension (benefit) cost |  | $ | (1,488 | ) |  | $ | (682 | ) |  | $ | 694 |  |  | $ | 466 |  |  | $ | (794 | ) |  | $ | (216 | )
Contributions paid |  | $ | — |  |  | $ | — |  |  | $ | 543 |  |  | $ | 1,131 |  |  | $ | 543 |  |  | $ | 1,131 |
Other Postretirement Benefit Plans [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Schedule of Net Periodic Benefit Costs | The components of the net periodic other postretirement benefit costs recognized are as follows:
|  | Three-Months Ended |
|  | December 31, |
|  | 2020 |  |  | 2019 |
Service cost |  | $ | — |  |  | $ | 1 |
Interest cost |  |  | 150 |  |  |  | 195 |
Amortization of: |  |  |  |  |  |  |  |
Net actuarial loss |  |  | 7 |  |  |  | 12 |
Prior service cost (benefit) |  |  | — |  |  |  | 1 |
Net periodic other postretirement cost |  | $ | 157 |  |  | $ | 209 |
Contributions paid |  | $ | 38 |  |  | $ | 345 |

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