Securities - Securities Available-for-Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,649,299	$ 1,871,260
Gross Unrealized Gains	18	1,337
Gross Unrealized Losses	(275,505)	(275,765)
Fair Value	1,373,812	1,596,832
U.S. Treasury
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	73,564	0
Gross Unrealized Gains	4	0
Gross Unrealized Losses	0	0
Fair Value	73,568	0
Obligations of State and Political Subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	700,223	889,940
Gross Unrealized Gains	3	1,309
Gross Unrealized Losses	(124,986)	(122,374)
Fair Value	575,240	768,875
MBS/CMO
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	681,737	761,025
Gross Unrealized Gains	11	28
Gross Unrealized Losses	(113,984)	(116,013)
Fair Value	567,764	645,040
US Gov’t Sponsored Entities & Agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	193,775	220,295
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(36,535)	(37,378)
Fair Value	$ 157,240	$ 182,917