Employee Benefits (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) fund	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Schedule Of Employee Benefits [Line Items]
Number of investment funds | fund			10
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			$ 602	$ 527
Accrued expenses and other liabilities	$ 25,483		25,483		$ 20,872
Non-interest expense	9,485	$ 8,876	18,590	16,829
Group Term Replacement Plan
Schedule Of Employee Benefits [Line Items]
Liability related to these postretirement benefits	1,447		1,447		1,423
Postemployment benefit expense			24	21
Other Director and Officer Postretirement Benefits
Schedule Of Employee Benefits [Line Items]
Non-interest expense			42	37
Liability related to these postretirement benefits	2,007		2,007		1,986
Officers | Executive Plan
Schedule Of Employee Benefits [Line Items]
Accrued expenses and other liabilities	1,590		1,590		1,545
Non-interest expense			383	229
Directors' Plan | Directors
Schedule Of Employee Benefits [Line Items]
Accrued expenses and other liabilities	$ 2,615		2,615		$ 2,877
Non-interest expense			$ 114	$ 71
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