Investment Securities - Securities Temporarily Impaired (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	$ 4,762	$ 3,794	$ 27,203
Unrealized Losses (Less than 12 months)	(43)	(63)	(931)
Fair Value (Estimated) (12 months or more)	248,992	257,711	245,752
Unrealized Losses (12 months or more)	(43,993)	(50,342)	(67,239)
Fair Value (Estimated)	253,754	261,505	272,955
Unrealized Losses	(44,036)	(50,405)	(68,170)
U.S. Treasury & Agency securities
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	0	0	9,882
Unrealized Losses (Less than 12 months)	0	0	(1)
Fair Value (Estimated) (12 months or more)	20,735	19,830	18,433
Unrealized Losses (12 months or more)	(5,305)	(6,203)	(7,598)
Fair Value (Estimated)	20,735	19,830	28,315
Unrealized Losses	(5,305)	(6,203)	(7,599)
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	4,762	1,712	12,550
Unrealized Losses (Less than 12 months)	(43)	(14)	(304)
Fair Value (Estimated) (12 months or more)	199,001	208,717	200,166
Unrealized Losses (12 months or more)	(33,000)	(38,477)	(50,626)
Fair Value (Estimated)	203,763	210,429	212,716
Unrealized Losses	(33,043)	(38,491)	(50,930)
State and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	0	2,082	4,771
Unrealized Losses (Less than 12 months)	0	(49)	(626)
Fair Value (Estimated) (12 months or more)	29,256	27,700	25,643
Unrealized Losses (12 months or more)	(5,688)	(5,653)	(9,011)
Fair Value (Estimated)	29,256	29,782	30,414
Unrealized Losses	$ (5,688)	(5,702)	(9,637)
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)		0	0
Unrealized Losses (Less than 12 months)		0	0
Fair Value (Estimated) (12 months or more)		1,464	1,510
Unrealized Losses (12 months or more)		(9)	(4)
Fair Value (Estimated)		1,464	1,510
Unrealized Losses		$ (9)	$ (4)

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