Loans (Troubled Debt Restructuring Additional Information) (Details) $ in Thousands	12 Months Ended
Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 loan	Dec. 31, 2019 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment in troubled debt restructurings	$ 3,600		$ 3,900
Recorded investment in troubled debt restructurings, reserve	$ 235		384
Number of loans modified as TDRs subdequent default \| loan	0	0
Nonperforming
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment in troubled debt restructurings	$ 2,400		3,000
Performing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded investment in troubled debt restructurings	$ 1,200		$ 906

Financing Receivable, Modifications, Allowance For Credit Losses

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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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=121611835&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=121585226&loc=d3e18845-111554

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- Definition

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524

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