Investment Securities Held-to-maturity Securities (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities
Held-to-maturity investment securities, at amortized cost (fair value of $32,541 at December 31, 2019 and $36,963 at December 31, 2018)	$ 31,747,000	$ 36,961,000
Amortized Cost	31,747,000	36,961,000
Gross Unrealized Gains	889,000	684,000
Gross Unrealized Losses	95,000	682,000
Fair Value	32,541,000	36,963,000
Gross realized gains or losses	0	0	$ 0
Reported Value Measurement [Member]
Schedule of Held-to-maturity Securities
Held-to-maturity investment securities, at amortized cost (fair value of $32,541 at December 31, 2019 and $36,963 at December 31, 2018)	31,747,000	36,961,000
States and political subdivisions
Schedule of Held-to-maturity Securities
Amortized Cost	4,346,000
Gross Unrealized Gains	445,000	493,000
Gross Unrealized Losses	0	0
Fair Value	4,791,000	4,896,000
States and political subdivisions \| Reported Value Measurement [Member]
Schedule of Held-to-maturity Securities
Held-to-maturity investment securities, at amortized cost (fair value of $32,541 at December 31, 2019 and $36,963 at December 31, 2018)	4,346,000	4,403,000
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities
Amortized Cost	21,494,000
Gross Unrealized Gains	169,000	191,000
Gross Unrealized Losses	94,000	632,000
Fair Value	21,569,000	28,603,000
Residential mortgage-backed securities \| Reported Value Measurement [Member]
Schedule of Held-to-maturity Securities
Held-to-maturity investment securities, at amortized cost (fair value of $32,541 at December 31, 2019 and $36,963 at December 31, 2018)	21,494,000	29,044,000
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities
Amortized Cost	5,907,000
Gross Unrealized Gains	275,000	0
Gross Unrealized Losses	1,000	50,000
Fair Value	6,181,000	3,464,000
Commercial mortgage-backed securities \| Reported Value Measurement [Member]
Schedule of Held-to-maturity Securities
Held-to-maturity investment securities, at amortized cost (fair value of $32,541 at December 31, 2019 and $36,963 at December 31, 2018)	$ 5,907,000	$ 3,514,000

Amount of investment in debt security measured at amortized cost (held-to-maturity).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Section 50
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-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563

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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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Amount, before other-than-temporary impairment (OTTI) accretion, of investment in debt securities measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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Amount of gain (loss) on sale of investment in debt security measured at amortized cost (held-to-maturity), excluding other-than-temporary impairment (OTTI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27405-111563

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

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