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Allowance for Loan Losses - Additional information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loan and Lease Losses, Adjustments, Other	$ 175,000	$ (400,000)
Financing Receivable, Individually Evaluated for Impairment	841,000		$ 824,000
Debt Instrument Non Performing Assets	$ 2,200,000
Percentage Of Allowance For Total Loans	1.06%		1.05%
Non-performing assets as a percent of loans	0.26%		0.26%
Allowance for Loan and Lease Losses Write-offs, Net	$ 120,000	$ 164,000
Allowance For Loan And Lease Losses Write Off Percentage	0.06%	0.08%
Percentage Of Allowance For Non Performing Assets	416.00%		397.00%
Financing Receivable, Recorded Investment, Past Due	$ 10,203,000		$ 4,399,000
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loan and Lease Losses, Adjustments, Other	(91,000)	$ (448,000)
Financing Receivable, Individually Evaluated for Impairment	833,000		816,000
Minimum aggregate balances for commercial loan relationship under structure loan rating process	1,000,000
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, Past Due	6,361,000		$ 0
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum individual loan balance requiring quarterly review	2,000,000
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum individual loan balance requiring quarterly review	250,000
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum individual loan balance requiring quarterly review	250,000
Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum individual loan balance requiring quarterly review	100,000
Minimum | Consumer and Residential Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Individually Evaluated for Impairment	$ 150,000
Minimum | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum percent of portfolio to be reviewed	40.00%

X

- Definition

The percentage of after recoveries, of loans and leases that have been written-off.

+ References

No definition available.

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+ References

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- Definition

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+ References

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- Definition

Amount of minimum aggregate balances for commercial loan relationship under structure loan rating process.

+ References

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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.

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- Definition

Amount of other addition (reduction) in allowance reserve for credit loss.

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- Definition

Amount, after recoveries, of loans and leases that have been written-off.

+ References

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The balance of financing receivables that were individually evaluated for impairment.

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- Definition

Amount of financing receivable past due.

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- Definition

Reflects the percentage derived from dividing impaired loans on which interest has ceased to be accrued by total loans.

+ References

No definition available.

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