Loans Loans (Analysis of Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020 USD ($) Modifications contract	Jun. 30, 2019 USD ($) Modifications contract	Jun. 30, 2020 USD ($) Modifications contract	Jun. 30, 2019 USD ($) Modifications contract	Dec. 31, 2019 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts \| contract	0	1	0	1
Financing Receivable Modifications Additional Commitment To Lend	$ 625		$ 625		$ 1,100
Financing Receivable, Modifications, Number of Contracts \| Modifications	5	7	9	10
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 1,818	$ 1,036	$ 3,053	$ 1,869
Financing Receivable, Troubled Debt Restructuring, Postmodification	1,818	1,036	3,053	1,869
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 0	$ 26	$ 0	$ 26
Commercial Business [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts \| Modifications	4	3	6	5
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 1,690	$ 918	$ 1,962	$ 1,534
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 1,690	$ 918	$ 1,962	$ 1,534
Agriculture [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts \| Modifications			1	0
Financing Receivable, Troubled Debt Restructuring, Premodification			$ 895	$ 0
Financing Receivable, Troubled Debt Restructuring, Postmodification			$ 895	$ 0
One-to-Four Family Residential [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts \| Modifications	1	4	2	5
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 128	$ 118	$ 196	$ 335
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 128	$ 118	$ 196	$ 335

Financing Receivable Modifications Additional Commitment To Lend

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+ References

No definition available.

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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=121611835&loc=SL6953676-111524

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Amount, after troubled debt restructuring, of modified financing receivable.

+ References

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Amount, before troubled debt restructuring, of financing receivable to be modified.

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524

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