Loans and Credit Quality - Narrative (Details)	3 Months Ended	12 Months Ended
Mar. 31, 2020 USD ($) financing_commitment contract	Dec. 31, 2019 USD ($) contract
Receivables [Abstract]
Net nonaccrual loans	$ 13,403,000	$ 13,951,000
Recorded investment in loans considered to be impaired	24,420,000	24,673,000
Total loans classified as troubled debt restructurings	$ 12,626,000	$ 10,100,000
Number of commitments on TDR \| financing_commitment	0
Charge offs on loans later classified as TDRs	$ 0
TDR with specific impairment \| contract	3	0

Financing Receivable, Modifications, Number of Commitments to Extend Financing

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- Definition

Financing Receivable, Modifications with Specific Allowance, Number of Contracts

+ References

No definition available.

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- Definition

Financing Receivable, Recorded Investment, Nonaccrual Status, Excluding Government Guaranteed Payments

+ References

No definition available.

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- Definition

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

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-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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- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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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- Definition

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953550-111524

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- References

No definition available.

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