Securities - Securities with Unrealized Losses - Securities Held-to-maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Securities, Fair Value
Less Than 12 Months		$ 4,926
12 Months or More	$ 237,612	437,710
Total	237,612	442,636
Less Than 12 Months	4,288	9,790
12 Months or More	510,620	533,766
Total	514,908	543,556
Securities, Unrealized (Losses)
Less Than 12 Months		(40)
12 Months or More	(4,363)	(9,894)
Total	(4,363)	(9,934)
Less Than 12 Months	(40)	(176)
12 Months or More	(73,016)	(86,559)
Total	(73,056)	(86,735)
U.S. Treasury
Securities, Fair Value
Less Than 12 Months		4,926
12 Months or More	184,162	377,443
Total	184,162	382,369
Securities, Unrealized (Losses)
Less Than 12 Months		(40)
12 Months or More	(1,440)	(5,581)
Total	(1,440)	(5,621)
Agency mortgage-backed securities
Securities, Fair Value
12 Months or More	53,450	60,267
Total	53,450	60,267
12 Months or More	490,099	520,615
Total	490,099	520,615
Securities, Unrealized (Losses)
12 Months or More	(2,923)	(4,313)
Total	(2,923)	(4,313)
12 Months or More	(72,377)	(86,011)
Total	(72,377)	(86,011)
Municipals - exempt from Federal tax
Securities, Fair Value
Less Than 12 Months	4,288	9,790
12 Months or More	20,521	13,151
Total	24,809	22,941
Securities, Unrealized (Losses)
Less Than 12 Months	(40)	(176)
12 Months or More	(639)	(548)
Total	$ (679)	$ (724)