Borrowings - Notes payable -Parenthetical (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Advances with FHLB with maturities ranging from 2021 Through 2029
Debt Instrument
Notes Payable Maturity Year Range Start	2021
Notes Payable Maturity Year Range End	2029
Advances with FHLB with maturities ranging from 2021 Through 2029 \| Minimum
Debt Instrument
Advances with the FHLB, interest rate	0.39%	1.14%
Advances with FHLB with maturities ranging from 2021 Through 2029 \| Maximum
Debt Instrument
Advances with the FHLB, interest rate	4.19%	4.19%
Advances with FRB \| Fixed rate with maturities on 2022 paying interest annually
Debt Instrument
Fixed interest rate percentage	0.35%
Debt instrument maturity year	2022
Debt Instrument Frequency Of Periodic Payment	annual
Unsecured senior debt \| Fixed Rate with maturities on 2023 paying interest semiannually
Debt Instrument
Fixed interest rate percentage	6.125%
Debt instrument maturity year	2023
Debt issuance costs	$ 3,426	$ 4,693
Debt Instrument Frequency Of Periodic Payment	semiannually
Junior subordinated debt \| Fixed Rate with maturities ranging from 2033 to 2034
Debt Instrument
Notes Payable Maturity Year Range Start	2033
Notes Payable Maturity Year Range End	2034
Debt issuance costs	$ 369	$ 396
Junior subordinated debt \| Fixed Rate with maturities ranging from 2033 to 2034 \| Minimum
Debt Instrument
Fixed interest rate percentage	6.125%
Junior subordinated debt \| Fixed Rate with maturities ranging from 2033 to 2034 \| Maximum
Debt Instrument
Fixed interest rate percentage	6.70%

No definition available.

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- Definition

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

+ References

No definition available.

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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

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)
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-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
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- Definition

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

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-Name Accounting Standards Codification
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-SubTopic 470
-Section 45
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