Amortized cost, fair value and tax equivalent yield of securities, by maturity (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
U S Treasury [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 10,814
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 10,005
Receivable with Imputed Interest, Effective Yield (Interest Rate)	1.29%
U S Treasury 2 [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 8,485
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 7,474
Receivable with Imputed Interest, Effective Yield (Interest Rate)	1.17%
U S Treasury Total [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 19,299
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 17,479
Receivable with Imputed Interest, Effective Yield (Interest Rate)	1.24%
U S Government Agency Notes [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 7,964
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 7,100
Receivable with Imputed Interest, Effective Yield (Interest Rate)	1.05%
U S Government Agency Notes 2 [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 7,960
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 6,863
Receivable with Imputed Interest, Effective Yield (Interest Rate)	1.42%
U S Government Agency Notes Total [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 15,924
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 13,963
Receivable with Imputed Interest, Effective Yield (Interest Rate)	1.23%
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 1,486
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 1,343
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.11%
U S States And Political Subdivisions 2 [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 14,308
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 12,054
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.31%
U S States And Political Subdivisions 3 [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 15,458
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 13,580
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.33%
U S States And Political Subdivisions 4 [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 23,847
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 21,222
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.73%
U S States And Political Subdivisions Total [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 55,099
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 48,199
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.49%
Mortgage Backed Securities Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 105,851
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 95,346
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.95%
Mortgage Backed Securities Collateralized Mortgage Obligations Total [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 105,851
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 95,346
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.95%
Corporate Debt Securities 2 [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 14,250
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 12,611
Receivable with Imputed Interest, Effective Yield (Interest Rate)	4.46%
Corporate Debt Securities Total [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 14,250
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 12,611
Receivable with Imputed Interest, Effective Yield (Interest Rate)	4.46%
Available-for-Sale Securities [Member]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 210,423
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 187,598
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.79%