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Investments (Tables)
6 Months Ended
Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Non-Current Investments Non-current investments consisted of the following:
 March 31, 2022September 30, 2021
Equity and fixed income mutual funds$— $6,936 
Life insurance policies4,560 4,626 
Equity-method investments379 458 
Other (primarily cost-method) investments18,758 18,418 
 $23,697 $30,438