Borrowed Funds (Narrative) (Details) - USD ($)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Repurchase agreements secured by available for sale securities	$ 137,100,000	$ 136,600,000
FHLB advances secured by loans receivable	$ 205,982,000
Borrowing capacity to assets, percentage	30.00%
FHLB, available funds	$ 515,200,000
FHLB available credit	134,400,000
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
FHLB advances secured by loans receivable	206,000,000.0
Securities Sold under Agreements to Repurchase [Member]
Debt Instrument [Line Items]
Repurchase agreements secured by available for sale securities	68,300,000
Various Financial Institutions [Member]
Debt Instrument [Line Items]
Line of credit facility, available funding	130,000,000.0
Outstandin borrowings	0
Federal Reserve Bank [Member]
Debt Instrument [Line Items]
Line of credit facility, available funding	1,100,000
Brokered Money Market Funds [Member]
Debt Instrument [Line Items]
Line of credit facility, available funding	$ 142,300,000
Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, term	10 years
Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, term	5 years

Borrowing capacity to assets, percentage.

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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

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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 restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(i)
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- Definition

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

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- Definition

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

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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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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