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Share-Based Payments (Tables) | 9 Months Ended
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Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Restricted Stock Activity | The transactions for restricted stock for the nine months ended June 30, 2017 were as follows:
| Shares |  | Weighted- average grant-date fair value
Non-vested at September 30, 2016 | 522,710 |  |  | $ | 45.10 |
Granted | 216,655 |  |  | 66.61 |
Vested | (186,367 | ) |  | 47.29 |
Expired or forfeited | (6,950 | ) |  | 50.29 |
Non-vested at June 30, 2017 | 546,048 |  |  | $ | 52.82 |
Stock Option Activity | The transactions for shares under options for the nine months ended June 30, 2017 were as follows:
| Shares |  | Weighted- average exercise price |  | Weighted- average remaining contractual term |  | Aggregate intrinsic value
Outstanding, September 30, 2016 | 77,733 |  |  | $ | 40.56 |  |  |  |  |
Exercised | (333 | ) |  | 40.56 |  |  |  |  |
Expired or forfeited | (77,400 | ) |  | 40.56 |  |  |  |  |
Outstanding, June 30, 2017 | — |  |  | — |  |  | — |  |  | $ | — |
Exercisable, June 30, 2017 | — |  |  | $ | — |  |  | — |  |  | $ | — |
Non-vested Options Activity | The transactions for non-vested options for the nine-months ended June 30, 2017 were as follows:
|  |  | Weighted-average grant-date
| Shares |  | fair value
Non-vested at September 30, 2016 | 77,400 |  |  | $ | 12.29 |
Expired or forfeited | (77,400 | ) |  | 12.29 |
Non-vested at June 30, 2017 | — |  |  | $ | — |
Assumptions used in Estimating Fair Value | The following table indicates the assumptions used in estimating the fair value of restricted stock granted during the nine-month periods ended June 30, 2017 and 2016.
| Nine Months Ended June 30,
| 2017 |  | 2016
Expected volatility | 20.2 | % |  | 20.7 | %
Dividend yield | 1.1 | % |  | 1.0 | %
Average risk-free interest rate | 1.7 | % |  | 1.7 | %
Average expected term (years) | 2.1 |  |  | 2.1 |

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- Definition Disclosure of the number and weighted-average grant date fair value for non-vested stock options that were outstanding at the beginning and end of the year, and the number of non-vested stock options that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of restricted stock, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -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 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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