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Stock Compensation Plans (Tables) | 6 Months Ended
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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

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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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