Fair Value - Additional information (Details) - USD ($)	3 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Fair Value Option Quantitative Disclosures [Line Items]
Fair value determination of loans held for sale description	The fair value of conventional loans held for sale is determined using the current 15 day forward contract price for either 15 or year conventional mortgages and the 60 day forward contract price for either 15 or 30 year Federal Housing Authority mortgages (Level 2). The fair value of permanent construction loans held for sale is determined using the current 60 day forward contract price for 15 or 30 years conventional mortgages which is then adjusted for unobservable market data such as estimated fall out rates and estimated time from origination to completion of construction (Level 3).
Loans held for sale, fair value disclosure	$ 58,222,000
Residential Mortgage and Permanent Construction Loans [Member]
Fair Value Option Quantitative Disclosures [Line Items]
Loans held for sale, 90 or more days past due	0
Loans held for sale, nonaccrual status	0
Loans held for sale, fair value disclosure	58,200,000	$ 0
Loans held for sale, contractual balance	52,600,000
Difference between fair value and contractual balance of loans held for sale	$ 5,600,000
Minimum [Member] \| Real Estate held for sale [Member]
Fair Value Option Quantitative Disclosures [Line Items]
Fair Value Input Discount Rate	0.00%
Maximum [Member] \| Real Estate held for sale [Member]
Fair Value Option Quantitative Disclosures [Line Items]
Fair Value Input Discount Rate	30.00%

Fair value determination of loans held for sale description.

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Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

No definition available.

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- Definition

This item represents the aggregate fair value of loans held as assets that are 90 days or more past due for which the fair value option has been elected.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612

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- Definition

This item represents the aggregate fair value of loans held as assets that are in nonaccrual status for which the fair value option has been elected, if the entity's policy is to recognize interest income separately from other changes in fair value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (e)(2)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612

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- Definition

For loans held as assets for which the fair value option has been elected, this item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of those loans that are 90 days or more past due, in nonaccrual status, or both.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (e)(3)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without 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 15
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524

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- Definition

Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

+ References

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