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Investments
 3 Months Ended
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Investments Investments
Non-current investments consisted of the following:
 December 31, 2023September 30, 2023
Equity and fixed income mutual funds$713 $699 
Life insurance policies5,038 4,926 
Equity-method investments350 323 
Other (primarily cost-method) investments19,123 19,040 
 $25,224 $24,988