Amortized cost, fair value and tax equivalent yield of securities, by maturity (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
U S Treasury [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 7,859
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 7,444
Receivable with Imputed Interest, Effective Yield (Interest Rate)	1.32%
U S Treasury 2 [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 11,391
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 10,228
Receivable with Imputed Interest, Effective Yield (Interest Rate)	1.18%
U S Treasury Total [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 19,250
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 17,672
Receivable with Imputed Interest, Effective Yield (Interest Rate)	1.24%
U S Government Agency Notes [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 3,990
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 3,666
Receivable with Imputed Interest, Effective Yield (Interest Rate)	0.92%
U S Government Agency Notes 2 [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 11,923
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 10,721
Receivable with Imputed Interest, Effective Yield (Interest Rate)	1.34%
U S Government Agency Notes Total [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 15,913
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 14,387
Receivable with Imputed Interest, Effective Yield (Interest Rate)	1.23%
US States and Political Subdivisions Debt Securities [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 512
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 478
Receivable with Imputed Interest, Effective Yield (Interest Rate)	1.74%
U S States And Political Subdivisions 2 [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 12,792
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 11,179
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.38%
U S States And Political Subdivisions 3 [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 12,971
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 11,282
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.36%
U S States And Political Subdivisions 4 [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 29,064
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 25,328
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.84%
U S States And Political Subdivisions Total [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 55,339
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 48,267
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.61%
Mortgage Backed Securities Collateralized Mortgage Obligations [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 117,258
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 109,350
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.00%
Mortgage Backed Securities Collateralized Mortgage Obligations Total [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 117,258
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 109,350
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.00%
Corporate Debt Securities 2 [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 13,750
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 13,434
Receivable with Imputed Interest, Effective Yield (Interest Rate)	4.35%
Corporate Debt Securities Total [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 13,750
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 13,434
Receivable with Imputed Interest, Effective Yield (Interest Rate)	4.35%
Available-for-Sale Securities [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 221,510
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 203,110
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.27%