Change in Accumulated Other Comprehensive Income - (Loss) Changes To Accumulated Other Comprehensive Income By Components (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ (18,763)		$ (18,006)	$ (19,416)		$ (20,446)	$ (18,006)	$ (20,446)
Other comprehensive (loss) before reclassifications	5,485			(5,237)			4,527	(3,935)
Tax effect of current period changes	(1,152)			1,100			(951)	828
Current period changes net of taxes	4,333	$ 1,054	(1,811)	(4,137)	$ (1,945)	2,975	3,576	(3,107)
Ending balance	(14,430)	(18,763)		(23,553)	(19,416)		(14,430)	(23,553)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(18,773)		(18,020)	(19,430)		(20,465)	(18,020)	(20,465)
Other comprehensive (loss) before reclassifications	5,485			(5,237)			4,532	(3,927)
Tax effect of current period changes	(1,152)			1,100			(952)	825
Current period changes net of taxes	4,333			(4,137)			3,580	(3,102)
Ending balance	(14,440)	(18,773)		(23,567)	(19,430)		(14,440)	(23,567)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	10		$ 14	14		$ 19	14	19
Other comprehensive (loss) before reclassifications	0			0			(5)	(8)
Tax effect of current period changes	0			0			1	3
Current period changes net of taxes	0			0			(4)	(5)
Ending balance	$ 10	$ 10		$ 14	$ 14		$ 10	$ 14