Securities - Amortized Cost and Fair Value, Held to Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 1,126,144	$ 1,221,496
Gross Unrealized Gains	3	74
Gross Unrealized Losses	(123,603)	(99,740)
Fair Value	1,002,544	1,121,830
Allowance for credit losses - held to maturity securities	(32)	(32)
Held-to-maturity securities, net of allowance for credit losses	1,126,112	1,221,464
Obligations of states and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	284,542	288,154
Gross Unrealized Gains	3	74
Gross Unrealized Losses	(42,491)	(33,688)
Fair Value	242,054	254,540
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	354,882	387,208
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(41,506)	(31,670)
Fair Value	313,376	355,538
Other debt securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	53,683	58,373
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(4,080)	(4,119)
Fair Value	49,603	54,254
Government agency mortgage-backed securities | Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	372,414	426,264
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(25,251)	(20,314)
Fair Value	347,163	405,950
Government agency mortgage-backed securities | Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	16,961	16,983
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,958)	(2,972)
Fair Value	14,003	14,011
Government agency collateralized mortgage obligations | Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	43,662	44,514
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(7,317)	(6,977)
Fair Value	$ 36,345	$ 37,537