Accumulated Other Comprehensive Income (Loss) (AOCI)- Amount Reclassified from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Defined Benefit Pension Plan Items
Amount Reclassified from AOCI
Net of tax	$ 18	$ 25	$ 55	$ 74
Defined Benefit Pension Plan Items | Amount Reclassified from AOCI
Amount Reclassified from AOCI
Other noninterest expense	26	35	79	104
Income tax benefit	(8)	(10)	(24)	(30)
Prior transition obligation and actuarial losses | Amount Reclassified from AOCI
Amount Reclassified from AOCI
Other noninterest expense	52	48	157	143
Prior service cost and actuarial losses | Amount Reclassified from AOCI
Amount Reclassified from AOCI
Other noninterest expense	(26)	(13)	(78)	(39)
Accumulated Other Comprehensive Loss
Amount Reclassified from AOCI
Net of tax	18	25	55	74
Accumulated Other Comprehensive Loss | Amount Reclassified from AOCI
Amount Reclassified from AOCI
Net of tax	$ 18	$ 25	$ 55	$ 74