Employee Benefits (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) fund	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Schedule Of Employee Benefits [Line Items]
Number of investment funds | fund			8
Number of equity funds | fund			6
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			$ 563	$ 602
Accrued expenses and other liabilities	$ 27,158		27,158		$ 25,302
Non-interest expense	9,289	$ 9,485	18,492	18,590
Group Term Replacement Plan
Schedule Of Employee Benefits [Line Items]
Liability related to these postretirement benefits	1,606		1,606		1,580
Postemployment benefit expense			26	24
Other Director and Officer Postretirement Benefits
Schedule Of Employee Benefits [Line Items]
Non-interest expense			31	42
Liability related to these postretirement benefits	2,041		2,041		2,031
Officers | Executive Plan
Schedule Of Employee Benefits [Line Items]
Accrued expenses and other liabilities	1,884		1,884		1,649
Non-interest expense			236	383
Directors' Plan | Directors
Schedule Of Employee Benefits [Line Items]
Accrued expenses and other liabilities	$ 3,049		3,049		$ 2,761
Non-interest expense			$ 102	$ 114
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