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Fair Value Measurements (Tables)
 3 Months Ended
Dec. 31, 2021
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:
 December 31, 2021September 30, 2021
 Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
Assets:        
Derivatives (1)
$— $3,906 $— $3,906 $— $209 $— $209 
Equity and fixed income mutual funds— 6,914 — 6,914 — 6,936 — 6,936 
Life insurance policies— 4,585 — 4,585 — 4,626 — 4,626 
Total assets at fair value$— $15,405 $— $15,405 $— $11,771 $— $11,771 
Liabilities:        
Derivatives (1)
$— $1,254 $— $1,254 $— $2,232 $— $2,232 
Total liabilities at fair value$— $1,254 $— $1,254 $— $2,232 $— $2,232 
(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.