Loans and Allowance for Credit Losses (Narrative) (Details) $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($) contract	Dec. 31, 2019 USD ($) contract
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, no longer reported as related party	$ 15,000
Financing receivable, modifications, post-modification recorded investment	$ 1,506	$ 3,650
Financing receivable, modifications, number of contracts \| contract	1	4
Financing receivable, recorded investment, nonaccrual status	$ 5,455	$ 10,590
Mortgage loans in process of foreclosure, amount	0	23
Loans and leases receivable, net amount, total	1,440,368	1,238,147
Loans	1,454,256	1,248,654
Financing receivable origination fee, net	622	1,800
Deferrals Of Principal And Or Interest On Outstanding Loan Balances	221,100
Deferred Loan Balances	$ 34,900
Other real estate owned, net		$ 74
Allowance from loan losses, as a percentage of total loans	0.95%	0.84%
Allowance from loan losses excluding PPP loans, as a percentage of total loans	1.04%
Small Business Administration (SBA), CARES Act, Paycheck Protection Program [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Amount of Loans Authorized	$ 122,900
Directors, Associates and Policy Making Officers [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, related parties	3,700	$ 18,800
Loans and leases receivable, related parties, additions	701	15,700
Loans and leases receivable, related parties, proceeds	776	8,600
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, modifications, post-modification recorded investment		$ 2,119
Financing receivable, modifications, number of contracts \| contract		3
Financing receivable, recorded investment, nonaccrual status	1,585	$ 2,475
Loans	443,542	442,506
Other real estate owned, net	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, recorded investment, nonaccrual status	28
Loans	31,466	17,737
Northwest Bank Branches [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Financing Receivable Net Of Discount	52,300	79,200
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Financing Receivable, Related Discount	754	1,100
Pass Performing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	1,211,331	1,042,408
Pass Performing [Member] \| Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	401,494	404,500
Pass Performing [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	31,221	17,347
Pass Watch [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	219,283	177,994
Pass Watch [Member] \| Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	36,759	29,223
Pass Watch [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	215	383
Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, recorded investment, nonaccrual status	0	0
Loans	11,388	13,523
Special Mention [Member] \| Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	2,946	5,549
Special Mention [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans		2
Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, recorded investment, nonaccrual status	5,500	10,600
Loans	12,254	14,729
Substandard [Member] \| Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	2,343	3,234
Substandard [Member] \| Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans	$ 30	$ 5

Allowance For Loan Losses, As A percentage Of Total Loans

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Allowance For Loan Losses excluding PPP loans, As A percentage Of Total Loans

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Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Financing Receivable Net Of Discount

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Deferrals Of Principal And/ Or Interest On Outstanding Loan Balances

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Financing receivable origination fee, net.

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The amount due from related parties which are no longer reported as related party loans due to changes in the composition of related parties.

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Number of financing receivables that have been modified by troubled debt restructurings.

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Amount, after troubled debt restructuring, of modified financing receivable.

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Amount of financing receivable on nonaccrual status.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date.

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Reflects the amount of new advances made to related parties in the form of loan and lease receivables.

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Amount of cash inflow from related parties which reduce the amount of loans and leases receivable due from related parties.

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Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

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Carrying amount as of the balance sheet date of other real estate and foreclosed assets. Other real estate may include real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings.

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