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Loans and Allowance for Loan and Lease Losses (Troubled Debt Restructurings) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 2,582,000	$ 2,582,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,480,000	2,480,000
Financing Receivable, Modifications, Recorded Investment	1,448,000	1,480,000
Commercial Portfolio [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	8,000	8,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	8,000	8,000
Financing Receivable, Modifications, Recorded Investment	6,000	6,000
Commercial Portfolio [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	1,806,000	1,806,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,707,000	1,707,000
Financing Receivable, Modifications, Recorded Investment	911,000	933,000
Commercial Portfolio [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	40,000	40,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	40,000	40,000
Financing Receivable, Modifications, Recorded Investment	30,000	31,000
Residential Portfolio [Member] | Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	728,000	728,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	725,000	725,000
Financing Receivable, Modifications, Recorded Investment	$ 501,000	510,000
Residential Portfolio [Member] | Commercial and Industrial [Member] | Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment		$ 6,000

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

+ 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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+ 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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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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-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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