Loans, Additional Information (Details)	3 Months Ended	6 Months Ended
	Mar. 31, 2021 Bank_Loan	Jun. 30, 2021 USD ($) Bank_Loan	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings that subsequently defaulted within 12 months of the restructuring date		$ 0	$ 0
Mortgage loans secured by residential real estate that were in the process of foreclosure		454,000
Financing Receivable, Short-Term Modifications At End Of Period		0		$ 1,553,000
Financing Receivable, CARES Act Section 4013 Modifications, Dollar Amount, End Of Period		10,404,000		19,023,000
Loans and Leases Receivable, before Fees, Gross		1,319,163,000		1,300,556,000
Federal Home Loan Mortgage Corporation and Other Investors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal balance of loans serviced for others		126,924,000		137,188,000
Commercial and industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, before Fees, Gross		$ 97,240,000		100,254,000
Commercial and industrial [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Maturity Period		1 year
Commercial and industrial [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Maturity Period		10 years
Commercial, secured by real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, before Fees, Gross		$ 836,085,000		843,230,000
Commercial, secured by real estate [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Adjustable rate period		1 year
Amortization period		5 years
Balloon payments period		1 year
Loan to appraised value ratio		75.00%
Commercial, secured by real estate [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Adjustable rate period		10 years
Amortization period		25 years
Balloon payments period		10 years
Loan to appraised value ratio		85.00%
Residential real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Home equity line of credit draw period		5 years
Loans and Leases Receivable, before Fees, Gross		$ 341,447,000		309,692,000
Residential real estate [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Adjustable rate period		1 year
Amortization period		5 years
Loan to appraised value ratio		80.00%
Residential real estate [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Adjustable rate period		15 years
Amortization period		30 years
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, before Fees, Gross		$ 35,257,000		$ 36,917,000
Consumer [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortization period		72 months
Paycheck Protection Program Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Interest Rate		1.00%
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		$ 45,500,000
Financing Receivable, Year One, Originated, Current Fiscal Year		38,300,000
Loans and Leases Receivable, before Fees, Gross		$ 23,800,000
Financing Receivable, Number Of Contracts | Bank_Loan	316	358
Paycheck Protection Program Loans [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortization period		2 years
Paycheck Protection Program Loans [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortization period		5 years