Employee Benefits (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) fund	Sep. 30, 2021 USD ($)	Dec. 31, 2021 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			$ 882	$ 798
Accrued expenses and other liabilities	$ 27,098		27,098		$ 20,872
Non-interest expense	9,239	$ 9,138	27,829	25,967
Group Term Replacement Plan
Schedule Of Employee Benefits [Line Items]
Liability related to these postretirement benefits	1,459		1,459		1,423
Postemployment benefit expense			36	32
Other Director and Officer Postretirement Benefits
Schedule Of Employee Benefits [Line Items]
Non-interest expense			65	56
Liability related to these postretirement benefits	2,019		2,019		1,986
Officers | Executive Plan
Schedule Of Employee Benefits [Line Items]
Accrued expenses and other liabilities	1,619		1,619		1,545
Non-interest expense			565	392
Directors' Plan | Directors
Schedule Of Employee Benefits [Line Items]
Accrued expenses and other liabilities	$ 2,574		2,574		$ 2,877
Non-interest expense			$ 172	$ 106
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