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Fair Value Measurements (Tables)
 6 Months Ended
Mar. 31, 2024
Fair Value Disclosures [Abstract]  
Fair Value of Assets and Liabilities Measured on a Recurring Basis
The fair values of the Company's assets and liabilities measured on a recurring basis are categorized as follows:
 March 31, 2024September 30, 2023
 Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
Assets:        
Derivatives (1)
$— $1,889 $— $1,889 $— $4,006 $— $4,006 
Equity and fixed income mutual funds— 1,466 — 1,466 — 699 — 699 
Life insurance policies— 4,825 — 4,825 — 4,926 — 4,926 
Total assets at fair value$— $8,180 $— $8,180 $— $9,631 $— $9,631 
Liabilities:        
Derivatives (1)
$— $5,198 $— $5,198 $— $2,766 $— $2,766 
Total liabilities at fair value$— $5,198 $— $5,198 $— $2,766 $— $2,766 
(1) Interest rate swaps and cross currency swaps are valued based on observable market swap rates and are classified within Level 2 of the fair value hierarchy.