Borrowings and Related Interest (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Subordinated Debt	$ 36,083	$ 36,083
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Loans pledged as collateral to secure FHLB advances	1,117,000	1,159,000
Additional Borrowing Capacity	$ 786,000	$ 814,000
Weighted average period remaining maturity of FHLB advances	16 months 18 days	18 months 6 days
Interest payable	$ 95	$ 96
Minimum amount of qualifying collateral	110.00%
Minimum [Member] \| Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Debt instrument term	1 day
Maximum [Member] \| Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Debt instrument term	5 years

Weighted average maturity (weighted by amount of the agreement) of FHLB advances.

No definition available.

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- Definition

Minimum amount of qualifying collateral of the fair value of outstanding advances.

+ References

No definition available.

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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

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

Amount of interest payable on debt, including, but not limited to, trade payables.

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- Definition

Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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