Borrowings - Notes payable -Parenthetical (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($)
Advances with FHLB with maturities ranging from 2020 Through 2029
Debt Instrument
Notes Payable Maturity Year Range Start	2020
Notes Payable Maturity Year Range End	2029
Debt Instrument Frequency Of Periodic Payment	monthly
Advances with FHLB with maturities ranging from 2020 Through 2029 \| Minimum
Debt Instrument
Advances with the FHLB, interest rate	1.14%
Advances with FHLB with maturities ranging from 2020 Through 2029 \| Maximum
Debt Instrument
Advances with the FHLB, interest rate	4.19%
Fixed Rate with maturities on 2023 paying interest semiannually \| Unsecured senior debt
Debt Instrument
Fixed interest rate percentage	6.125%
Senior Debt Maturity Year	2023
Debt issuance costs	$ 4,376
Debt Instrument Frequency Of Periodic Payment	semiannually
Fixed Rate with maturities ranging from 2033 to 2034 \| Junior subordinated debt
Debt Instrument
Notes Payable Maturity Year Range Start	2033
Notes Payable Maturity Year Range End	2034
Debt issuance costs	$ 389
Fixed Rate with maturities ranging from 2033 to 2034 \| Minimum \| Junior subordinated debt
Debt Instrument
Fixed interest rate percentage	6.125%
Fixed Rate with maturities ranging from 2033 to 2034 \| Maximum \| Junior subordinated debt
Debt Instrument
Fixed interest rate percentage	6.70%

Latest year the outstanding debt instruments are required to be repaid.

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- Definition

Earliest year the outstanding debt instruments are required to be repaid.

+ References

No definition available.

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- Definition

Maturity year the outstanding debt instruments are required to be repaid.

+ References

No definition available.

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- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- Definition

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.

+ References

No definition available.

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- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

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Period Type:	instant

- Definition

States the interest rate applicable to Federal Home Loan Bank advances outstanding as of the Balance Sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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