Employee Benefits (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) fund	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Schedule Of Employee Benefits [Line Items]
Number of investment funds | fund	9
Number of equity funds | fund	7
Number of fixed income funds | fund	2
Percentage of internal revenue contribution	25.00%
Percentage of internal revenue service limitations	6.00%
Employer contribution in defined contribution plan	$ 286	$ 294
Accrued expenses and other liabilities	26,870		$ 25,302
Non-interest expense	9,203	9,105
Group Term Replacement Plan
Schedule Of Employee Benefits [Line Items]
Liability related to these postretirement benefits	1,593		1,580
Postemployment benefit expense	13	12
Other Director and Officer Postretirement Benefits
Schedule Of Employee Benefits [Line Items]
Non-interest expense	16	19
Liability related to these postretirement benefits	2,037		2,031
Officers | Executive Plan
Schedule Of Employee Benefits [Line Items]
Accrued expenses and other liabilities	1,861		1,649
Non-interest expense	131	197
Directors' Plan | Directors
Schedule Of Employee Benefits [Line Items]
Accrued expenses and other liabilities	2,873		$ 2,761
Non-interest expense	$ 51	$ 56
Minimum | Other Director and Officer Postretirement Benefits
Schedule Of Employee Benefits [Line Items]
Post retirement benefit period	15 years
Minimum | Officers | Executive Plan
Schedule Of Employee Benefits [Line Items]
Terms of services	1 year
Maximum | Other Director and Officer Postretirement Benefits
Schedule Of Employee Benefits [Line Items]
Post retirement benefit period	20 years
Maximum | Officers | Executive Plan
Schedule Of Employee Benefits [Line Items]
Terms of services	5 years