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Stock Award Plans - Nonvested Stock Options (Details) - USD ($) | 12 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
Weighted Average Grant Date Fair Value |  |  |
Unrecognized compensation cost for stock options, net of forfeitures | $ 0 |  |
Non-Vested Options |  |  |
Options Outstanding |  |  |
Outstanding at beginning of period (in shares) | 0 | 69,287 | 145,795
Vested (in shares) | 0 | (62,227) | (61,018)
Forfeited (in shares) | 0 | (7,060) | (15,490)
Outstanding at end of period (in shares) | 0 | 0 | 69,287
Weighted Average Grant Date Fair Value |  |  |
Outstanding at beginning of period (in dollars per share) | $ 0.00 | $ 3.85 | $ 3.87
Vested (in dollars per share) | 0.00 | 3.91 | 3.88
Forfeited (in dollars per share) | 0.00 | 3.89 | 3.90
Outstanding at end of period (in dollars per share) | $ 0.00 | $ 0.00 | $ 3.85

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- Definition Unrecognized cost of unvested share-based compensation awards. + 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 (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Number of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options outstanding. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Number of options vested. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of options vested. + References No definition available. + Details
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- Details
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