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Stock Compensation Plans (Tables)
6 Months Ended
Mar. 31, 2019
Share-based Compensation [Abstract]  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award
Stock option activity for the six months ended March 31, 2019 and 2018 is summarized as follows:
 
Six Months Ended
March 31, 2019
 
Six Months Ended
March 31, 2018
 
 Number of Shares

 
Weighted
Average
Exercise
Price

 
 Number of Shares

 
Weighted
Average
Exercise
Price

Options outstanding, beginning of period
380,820

 
$
16.03

 
380,120

 
$
13.23

Exercised
(30,416
)
 
9.31

 
(29,150
)
 
8.05

Forfeited
(3,900
)
 
18.63

 
(4,650
)
 
11.64

Options outstanding, end of period
346,504

 
$
16.59

 
346,320

 
$
13.69

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
Additional information regarding options outstanding at March 31, 2019 is as follows:
 
 
Options Outstanding
 
Options Exercisable
Range of
Exercise
Prices ($)
 
Number

 
Weighted
Average
Exercise
Price

 
Weighted
Average
Remaining
Contractual
Life (Years)
 
Number

 
Weighted
Average
Exercise
Price

 
Weighted
Average
Remaining
Contractual
Life (Years)
$ 4.01 - 4.55
 
2,500

 
$
4.33

 
1.4
 
2,500

 
$
4.33

 
1.4
   5.86 - 6.00
 
24,850

 
5.97

 
3.6
 
24,850

 
5.97

 
3.6
   9.00
 
52,775

 
9.00

 
4.6
 
52,775

 
9.00

 
4.6
 10.26 - 10.71
 
115,129

 
10.58

 
6.1
 
68,029

 
10.55

 
5.9
 15.67
 
49,200

 
15.67

 
7.5
 
17,400

 
15.67

 
7.5
 29.69
 
56,100

 
29.69

 
8.5
 
11,300

 
29.69

 
8.5
 31.80
 
45,950

 
31.80

 
9.5
 

 
N/A

 
N/A
 
 
346,504

 
$
16.59

 
6.7
 
176,854

 
$
11.08

 
5.4