Loans Loans (Analysis of Troubled Debt Restructurings) (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($) Modifications contract	Mar. 31, 2019 USD ($) 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
Financing Receivable Modifications Additional Commitment To Lend	$ 812		$ 1,100
Financing Receivable, Modifications, Number of Contracts \| Modifications	4	3
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 1,235	$ 833
Financing Receivable, Troubled Debt Restructuring, Postmodification	1,235	833
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 0	$ 26
Commercial Business [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts \| Modifications	2	2
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 272	$ 616
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 272	$ 616
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	1
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 68	$ 217
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 68	$ 217

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=118936363&loc=SL6953676-111524

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

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

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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=118936363&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=118936363&loc=SL6953682-111524

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