Commitments and Contingencies and Derivatives (Schedule of unfunded commitments) (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Jan. 01, 2023	Sep. 30, 2023	Sep. 30, 2023
Off-Balance-Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance		$ 268
Provision for credit losses	$ 221	31	$ 78
Ending balance		299	299
Commercial real estate
Off-Balance-Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance		200
Provision for credit losses		26	77
Ending balance		226	226
Commercial and industrial
Off-Balance-Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance		61
Provision for credit losses		4
Ending balance		65	65
Consumer
Off-Balance-Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance		7
Provision for credit losses		1	1
Ending balance		8	8
Cumulative effect of change in accounting principle | Accounting Standards Update 2016-13
Off-Balance-Sheet, Credit Loss, Liability [Roll Forward]
Ending balance		221	221
Cumulative effect of change in accounting principle | Accounting Standards Update 2016-13 | Commercial real estate
Off-Balance-Sheet, Credit Loss, Liability [Roll Forward]
Ending balance		149	149
Cumulative effect of change in accounting principle | Accounting Standards Update 2016-13 | Commercial and industrial
Off-Balance-Sheet, Credit Loss, Liability [Roll Forward]
Ending balance		65	65
Cumulative effect of change in accounting principle | Accounting Standards Update 2016-13 | Consumer
Off-Balance-Sheet, Credit Loss, Liability [Roll Forward]
Ending balance		$ 7	$ 7