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Stock Compensation Plans (Tables)
9 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award
Stock option activity for the nine months ended June 30, 2021 and 2020 is summarized as follows:
 Nine Months Ended June 30, 2021Nine Months Ended June 30, 2020
  Number of SharesWeighted
Average
Exercise
Price
 Number of SharesWeighted
Average
Exercise
Price
Options outstanding, beginning of period395,349 $18.45 378,304 $18.15 
Exercised(62,764)9.82 (37,975)10.31 
Granted1,500 19.13 1,000 26.50 
Forfeited(5,270)26.91 (9,050)25.10 
Options outstanding, end of period328,815 $19.96 332,279 $18.88 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The weighted average assumptions for options granted during the nine months ended June 30, 2021 were as follows:
Expected volatility33 %
Expected life (in years)5
Expected dividend yield4.76 %
Risk free interest rate0.38 %
Grant date fair value per share$3.26 
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
Additional information regarding options outstanding at June 30, 2021 is as follows:

 Options OutstandingOptions Exercisable
Range of
Exercise
Prices ($)
NumberWeighted
Average
Exercise
Price
Weighted
Average
Remaining
Contractual
Life (Years)
NumberWeighted
Average
Exercise
Price
Weighted
Average
Remaining
Contractual
Life (Years)
$5.86-6.004,000 $5.93 1.34,000 $5.93 1.3
  9.0027,000 9.00 2.327,000 9.00 2.3
10.26-10.7160,575 10.57 3.760,575 10.57 3.7
15.67-19.13103,000 16.50 7.924,400 16.50 5.3
26.50-27.1443,990 27.13 8.38,798 27.13 8.3
29.6950,250 29.69 6.330,150 29.69 6.3
31.8040,000 31.80 7.316,000 31.80 7.3
 328,815 $19.96 6.3170,923 $17.15 4.7