Amortized cost, fair value and tax equivalent yield of securities, by maturity (Details) $ in Thousands	9 Months Ended
	Sep. 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	$ 7,871
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 7,239
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	$ 11,395
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 9,738
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	$ 19,266
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 16,977
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	$ 4,979
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 4,319
Receivable with Imputed Interest, Effective Yield (Interest Rate)	0.97%
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	$ 10,938
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 9,189
Receivable with Imputed Interest, Effective Yield (Interest Rate)	1.35%
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	$ 15,917
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 13,508
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	$ 511
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 459
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	$ 15,282
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 12,445
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.31%
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	$ 12,842
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 10,382
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.53%
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	$ 26,625
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 21,324
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	$ 55,260
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 44,610
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	$ 112,723
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 100,487
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.29%
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	$ 112,723
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 100,487
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.29%
Corporate Debt Securities 2 [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 13,250
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 12,596
Receivable with Imputed Interest, Effective Yield (Interest Rate)	4.32%
Corporate Debt Securities 3 [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 1,000
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 983
Receivable with Imputed Interest, Effective Yield (Interest Rate)	6.25%
Corporate Debt Securities Total [Member]
Summary of Investment Holdings [Line Items]
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	$ 13,579
Receivable with Imputed Interest, Effective Yield (Interest Rate)	4.46%
Available-for-Sale Securities [Member]
Summary of Investment Holdings [Line Items]
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	$ 217,416
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	$ 189,161
Receivable with Imputed Interest, Effective Yield (Interest Rate)	2.45%