Loans, Allowance for Loan Losses and Impaired Loans - Schedule of Restructured Loans In Default (Details) $ in Thousands	12 Months Ended
Sep. 30, 2018 USD ($) Contract	Sep. 30, 2017 USD ($) Contract
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications \| Contract	19	7
Recorded Investment \| $	$ 2,674	$ 621
Residential real estate:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications \| Contract	5	4
Recorded Investment \| $	$ 504	$ 593
Commercial/Agricultural real estate:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications \| Contract	5	0
Recorded Investment \| $	$ 694	$ 0
Consumer non-real estate:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications \| Contract	2	3
Recorded Investment \| $	$ 17	$ 28
Commercial/Agricultural non-real estate:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications \| Contract	7	0
Recorded Investment \| $	$ 1,459	$ 0

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524

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- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

+ References

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