| Reconciliation of Benefit Obligations, Plan Assets and Funded Status of Pension Plans | The following provides a reconciliation of benefit obligations, plan assets and funded status of the plans as of the Company's actuarial valuation as of September 30, 2023 and 2022: 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | Pension |  | Other Postretirement |  
|  | 2023 |  | 2022 |  | 2023 |  | 2022 |  
| Change in benefit obligation: |  |  |  |  |  |  |  |  
| Benefit obligation, beginning of year | $ | 36,609 |  |  | $ | 293,926 |  |  | $ | 12,813 |  |  | $ | 18,841 |  |  
| 
Acquisitions (1)
 | — |  |  | 9,829 |  |  | — |  |  | — |  |  
| Service cost | 163 |  |  | 392 |  |  | 76 |  |  | 165 |  |  
| Interest cost | 497 |  |  | 1,127 |  |  | 644 |  |  | 411 |  |  
| Actuarial gain | (512) |  |  | (19,978) |  |  | (641) |  |  | (5,989) |  |  
|  |  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  |  
| Settlement | (24,242) |  |  | (242,232) |  |  | — |  |  | — |  |  
| Exchange loss (gain) | 979 |  |  | (3,093) |  |  | — |  |  | — |  |  
| Benefit payments | (598) |  |  | (3,362) |  |  | (517) |  |  | (615) |  |  
| 
Benefit obligation, end of year (2)
 | 12,896 |  |  | 36,609 |  |  | 12,375 |  |  | 12,813 |  |  
|  |  |  |  |  |  |  |  |  
| Change in plan assets: |  |  |  |  |  |  |  |  
| Fair value, beginning of year | — |  |  | 208,344 |  |  | — |  |  | — |  |  
|  |  |  |  |  |  |  |  |  
| Actual return | — |  |  | 368 |  |  | — |  |  | — |  |  
| Benefit payments | (598) |  |  | (3,362) |  |  | (517) |  |  | (615) |  |  
| Employer contributions | 24,840 |  |  | 36,882 |  |  | 517 |  |  | 615 |  |  
| Settlement | (24,242) |  |  | (242,232) |  |  | — |  |  | — |  |  
| Fair value, end of year | — |  |  | — |  |  | — |  |  | — |  |  
|  |  |  |  |  |  |  |  |  
| Funded status | (12,896) |  |  | (36,609) |  |  | (12,375) |  |  | (12,813) |  |  
| Unrecognized actuarial (gain) loss | (1,518) |  |  | 5,140 |  |  | (5,906) |  |  | (5,973) |  |  
| Unrecognized prior service (credit) cost | — |  |  | (4,815) |  |  | (956) |  |  | (1,320) |  |  
| Net amount recognized | $ | (14,414) |  |  | $ | (36,284) |  |  | $ | (19,237) |  |  | $ | (20,106) |  |  
|  |  |  |  |  |  |  |  |  
| Amounts recognized in the consolidated balance sheet: |  |  |  |  |  |  |  |  
| Current liability | $ | (68) |  |  | $ | (24,172) |  |  | $ | (876) |  |  | $ | (830) |  |  
| Noncurrent benefit liability | (12,828) |  |  | (12,437) |  |  | (11,499) |  |  | (11,983) |  |  
| Accumulated other comprehensive (income) loss | (1,518) |  |  | 325 |  |  | (6,862) |  |  | (7,293) |  |  
| Net amount recognized | $ | (14,414) |  |  | $ | (36,284) |  |  | $ | (19,237) |  |  | $ | (20,106) |  |  
|  |  |  |  |  |  |  |  |  
| Amounts recognized in accumulated |  |  |  |  |  |  |  |  
| 
       other comprehensive (income) loss:
 |  |  |  |  |  |  |  |  
| Net actuarial (gain) loss | $ | (1,518) |  |  | $ | 5,140 |  |  | $ | (5,906) |  |  | $ | (5,973) |  |  
| Prior service (credit) cost | — |  |  | (4,815) |  |  | (956) |  |  | (1,320) |  |  
| Net amount recognized | $ | (1,518) |  |  | $ | 325 |  |  | $ | (6,862) |  |  | $ | (7,293) |  | 
(1) Fiscal 2022 reflects benefit obligations assumed in connection with the acquisition of OLBRICH and R+S Automotive.  For additional information, see Note 21.
 
(2) Gains and losses related to changes in assumptions (e.g., discount rate, mortality, etc.), asset, salary and other experience, and curtailments impacted benefit obligations.
 | 
| Net Periodic Pension and Other Postretirement Benefit Cost | Net periodic pension and other postretirement benefit cost for the plans included the following: 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | Pension |  | Other Postretirement |  
|  | 2023 |  | 2022 |  | 2021 |  | 2023 |  | 2022 |  | 2021 |  
| Service cost | $ | 163 |  |  | $ | 392 |  |  | $ | 7,919 |  |  | $ | 76 |  |  | $ | 165 |  |  | $ | 201 |  |  
| Interest cost * | 497 |  |  | 1,127 |  |  | 6,145 |  |  | 644 |  |  | 411 |  |  | 376 |  |  
| Expected return on plan assets * | — |  |  | (1,040) |  |  | (10,809) |  |  | — |  |  | — |  |  | — |  |  
| Amortization: |  |  |  |  |  |  |  |  |  |  |  |  
| Prior service cost | — |  |  | (152) |  |  | (127) |  |  | (364) |  |  | (364) |  |  | (364) |  |  
| Net actuarial (gain) loss * | (64) |  |  | 469 |  |  | 9,769 |  |  | (708) |  |  | — |  |  | — |  |  
| Curtailment gain * | — |  |  | — |  |  | (220) |  |  | — |  |  | — |  |  | — |  |  
| Special termination benefits * | — |  |  | — |  |  | 315 |  |  | — |  |  | — |  |  | — |  |  
| Prior-service cost write-offs * | — |  |  | — |  |  | 261 |  |  | — |  |  | — |  |  | — |  |  
| Settlement* | 1,271 |  |  | 30,856 |  |  | — |  |  | — |  |  | — |  |  | — |  |  
| Net benefit cost | $ | 1,867 |  |  | $ | 31,652 |  |  | $ | 13,253 |  |  | $ | (352) |  |  | $ | 212 |  |  | $ | 213 |  | 
* Non-service components of pension and postretirement expense are included in other income (deductions), net.
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