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OTHER OPERATING EXPENSE (Tables)
 12 Months Ended
Sep. 30, 2025
Other Income and Expenses [Abstract]  
Schedule of Other Operating Expense
Other operating expense consisted of the following:
Fiscal Year Ended September 30,
202520242023
Acquisition and integration costs$— $70 $1,228 
Restructuring costs (1)1,454 3,374 4,625 
Startup costs2,282 3,278 6,858 
Remediation costs— 1,404 2,357 
FNI Settlement Agreement (2)(7,550)— — 
Resolution Agreement and Plea Agreement (3)— 28,500 — 
Other costs7,524 5,916 3,469 
$3,710 $42,542 $18,537 

(1) Restructuring costs represent costs incurred in connection with the Company's site closures, site optimization strategy, the in-house integration of the Company’s North American transportation operations and Phase Two of the Company's site optimization program as discussed in Note 10 - Restructuring Costs.
(2) The proceeds received in connection with the settlement agreement with Freese and Nichols, Inc. (the "FNI Settlement Agreement") offset costs incurred to dispose of excess wastewater during previous years in addition to attorneys' fees in previous years and fiscal year 2025. Refer to Note 15 - Contingencies and Commitments for further discussion of the FNI Settlement Agreement.
(3) Amount relates to the charge recorded under the Resolution Agreement and Plea Agreement. Refer to Note 15 - Contingencies and Commitments for further discussion of the Resolution Agreement and Plea Agreement.