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Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Service charges on deposits |  |  |
Revenue from External Customer [Line Items] |  |  |
Service charges on deposits | $ 4,147 | $ 4,904 | $ 4,581
ATM and debit card interchange transaction fees |  |  |
Revenue from External Customer [Line Items] |  |  |
Service charges on deposits | 4,378 | 4,036 | 3,570
Escrow fees |  |  |
Revenue from External Customer [Line Items] |  |  |
Service charges on deposits | 273 | 197 | 211
Fee income from non-deposit investment sales |  |  |
Revenue from External Customer [Line Items] |  |  |
Service charges on deposits | $ 22 | $ 46 | $ 109

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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 + Details
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