Loans and Allowance for Loan and Lease Losses (Troubled Debt Restructurings) (Details) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,951,000	$ 3,282,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,850,000	3,181,000
Financing Receivable, Modifications, Recorded Investment	981,000	2,238,000
Commercial Portfolio [Member] \| Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	8,000	3,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	8,000	3,000
Financing Receivable, Modifications, Recorded Investment	7,000	3,000
Commercial Portfolio [Member] \| Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	1,214,000	2,562,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,115,000	2,463,000
Financing Receivable, Modifications, Recorded Investment	440,000	1,705,000
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	39,000	40,000
Residential Portfolio [Member] \| Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	689,000	677,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	687,000	675,000
Financing Receivable, Modifications, Recorded Investment	$ 495,000	$ 490,000

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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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Amount of financing receivable modified as troubled debt restructuring.

+ 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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=118939409&loc=d3e18845-111554

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