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Loans Receivable And Allowance For Loan Losses - Narrative (Details) |  | 6 Months Ended |
--- | --- | --- | ---
Apr. 30, 2020 USD ($) contract | Mar. 31, 2020 USD ($) contract | Sep. 30, 2019 USD ($)
Subsequent Event [Line Items] |  |  |
Unamortized loan commitment and origination fees and unamortized discounts or premiums |  | $ 1,130,000 |
Troubled debt restructured loan |  | 3,220,000 | $ 3,269,000
Loans and leases receivable, impaired, commitment to lend |  | 0 | 0
Allowance for loan losses allocated to TDR loans |  | $ 47,000 | $ 56,000
Number of contracts | contract |  | 125 |
Increase (decrease) from modification |  | $ 79,410,000 |
Percent increase (decrease) from modification |  | 8.60% |
Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Number of contracts | contract | 178 |  |
Increase (decrease) from modification | $ 125,240,000 |  |
Percent increase (decrease) from modification | 13.60% |  |

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- Definition Allowance for Loan Losses Allocated to Troubled Debt Restructured Loans + References No definition available. + Details
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- Definition Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification, Percent + References No definition available. + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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- Definition Amount of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118939409&loc=d3e18845-111554 + Details
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- Definition Amount of increase (decrease) in financing receivable modified from troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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- Definition Amount of unfunded portion of contractual agreement to lend funds to borrower for financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118939409&loc=d3e18794-111554 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Definition Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533 + Details
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