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Stock Compensation Plans (Tables)
6 Months Ended
Mar. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award
Stock option activity for the six months ended March 31, 2021 and 2020 is summarized as follows:
 Six Months Ended March 31, 2021Six Months Ended March 31, 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(53,564)9.70 (36,375)10.30 
Granted1,500 19.13 1,000 26.50 
Forfeited(4,520)27.57 (8,650)24.84 
Options outstanding, end of period338,765 $19.71 334,279 $18.86 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The weighted average assumptions for options granted during the six months ended March 31, 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 March 31, 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)
$5.86-6.004,200 $5.93 1.54,200 $5.93 1.5
  9.0030,000 9.00 2.630,000 9.00 2.6
10.26-10.7165,575 10.57 4.065,575 10.57 4.0
15.67-19.13104,500 16.50 8.225,400 15.67 5.5
26.50-27.1443,990 27.13 8.58,798 27.13 8.5
29.6950,400 29.69 6.530,300 29.69 6.5
31.8040,100 31.80 7.516,100 31.80 7.5
 338,765 $19.71 6.5180,373 $16.83 4.9