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Stock Compensation Plans (Tables)
6 Months Ended
Mar. 31, 2024
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, 2024 and 2023 is summarized as follows:
 Six Months Ended March 31, 2024Six Months Ended March 31, 2023
  Number of SharesWeighted
Average
Exercise
Price
 Number of SharesWeighted
Average
Exercise
Price
Options outstanding, beginning of period369,150 $24.00 421,925 $23.30 
Exercised(29,900)13.03 (26,055)19.88 
Granted— — 1,000 33.40 
Forfeited(10,140)25.71 (4,600)27.38 
Options outstanding, end of period329,110 $24.95 392,270 $23.50 
Time Based
Number of Unvested SharesWeighted Average Grant Date Fair Value
Outstanding, September 30, 202326,150 $27.37 
     Granted— — 
     Forfeited— — 
     Vested— — 
Outstanding, March 31, 202426,150 $27.37 
Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
The weighted average assumptions for options granted during the six months ended March 31, 2023 were as follows:

Expected volatility33 %
Expected life (in years)5
Expected dividend yield2.99 %
Risk free interest rate3.58 %
Grant date fair value per share$8.65 
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
Additional information regarding options outstanding at March 31, 2024 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)
10.26-10.7126,250 $10.62 1.326,250 $10.62 1.3
15.67-19.1360,800 16.56 5.439,140 16.37 4.8
26.50-27.40101,140 27.31 7.541,380 27.23 6.5
28.23-29.69106,600 28.79 6.067,000 29.12 5.1
31.80-33.4034,320 31.85 4.633,520 31.61 4.5
 329,110 $24.95 5.8207,290 $24.43 4.7