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Investments (Tables)
 9 Months Ended
Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract]  
Non-Current Investments
Non-current investments consisted of the following:
 June 30, 2020September 30, 2019
Equity and fixed income mutual funds$24,119  $22,986  
Life insurance policies4,100  4,030  
Equity-method investments386  39,761  
Other investments33,463  18,724  
 $62,068  $85,501