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Loans and Allowance for Credit Losses on Loans - Defaults on Troubled Debt Restructurings (Details)	12 Months Ended				24 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2020 USD ($) contract	Dec. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($) contract	Dec. 31, 2020 USD ($) item
Allowance for Credit Losses on Loans
Number of loans modified as troubled debt restructurings during the period		15	15	3
Recorded investment of troubled debt restructurings | $	$ 674,000	$ 674,000	$ 674,000	$ 1,039,000	$ 674,000
Default period contractually past due under modified terms (in days)	30 days
Number of defaults on troubled debt restructurings | item					0
Period of consecutive payments (in months)	6 months

X

- Definition

Represents the number of days past due under the modified terms in a troubled debt restructuring, when a loan is considered to be in default.

+ References

No definition available.

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- Definition

Represents the period of time of consecutive payments made in accordance with modified terms for troubled debt restructurings to return to accruing status from nonaccruing status.

+ References

No definition available.

+ Details

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- Definition

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=121611835&loc=SL6953676-111524

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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=121611835&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=121585226&loc=d3e18845-111554

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X

- Definition

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=121611835&loc=SL6953682-111524

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- References

No definition available.

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