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Allowance For Doubtful Accounts
 12 Months Ended
Sep. 30, 2018
Receivables [Abstract]  
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
ALLOWANCE FOR DOUBTFUL ACCOUNTS
Valuation and qualifying account information related to the allowance for doubtful accounts receivable related to continuing operations is as follows:
(Thousands of Dollars)
2018

 
2017

 
2016

 
 
 
 
 
 
Balance, beginning of year
4,796

 
4,327

 
4,194

Additions charged to expense
1,952

 
1,696

 
1,195

Deductions from reserves
(1,942
)
 
(1,227
)
 
(1,062
)
Balance, end of year
4,806

 
4,796

 
4,327