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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Sep. 30, 2017
Equity [Abstract] |
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) | The changes in accumulated other comprehensive income (loss) ("AOCI") by component during the years ended September 30, 2017, 2016 and 2015 are as follows (dollars in thousands):
| Changes in fair value of available for sale securities [1] |  | Other-than-temporary impairment on held to maturity securities [1] |  | Total [1]
2017 |  |  |  |  |
Balance of AOCI at the beginning of period | $ | 4 |  |  | $ | (179 | ) |  | $ | (175 | )
Net change | (23 | ) |  | 74 |  |  | 51 |
Balance of AOCI at the end of period | $ | (19 | ) |  | $ | (105 | ) |  | $ | (124 | )
2016 |  |  |  |  |
Balance of AOCI at the beginning of period | $ | 3 |  |  | $ | (316 | ) |  | $ | (313 | )
Net change | 1 |  |  | 137 |  |  | 138 |
Balance of AOCI at the end of period | $ | 4 |  |  | $ | (179 | ) |  | $ | (175 | )
2015 |  |  |  |  |
Balance of AOCI at the beginning of period | $ | 37 |  |  | $ | (376 | ) |  | $ | (339 | )
Net change | (34 | ) |  | 60 |  |  | 26 |
Balance of AOCI at the end of period | $ | 3 |  |  | $ | (316 | ) |  | $ | (313 | )
___________________ [1] All amounts are net of income taxes.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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