Securities - Schedule of Fair Value of Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Available for sale
Amortized Cost	$ 281,009	$ 282,022
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(49,578)	(48,345)
Fair Value	231,431	233,677
Held to maturity
Amortized Cost	1,843,991	1,867,848
Gross Unrealized Gains	880	958
Gross Unrealized Losses	(294,744)	(302,538)
Fair Value	1,550,127	1,566,268
Less: Allowance for credit losses	(140)	(158)	$ (158)	$ (157)
Held to maturity securities, net of allowance for credit losses	1,843,851	1,867,690
U.S. Treasury, federal agencies, and government sponsored agencies
Available for sale
Amortized Cost	2,258	2,258
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(408)	(457)
Fair Value	1,850	1,801
Held to maturity
Amortized Cost	275,854	278,383
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(34,442)	(39,253)
Fair Value	241,412	239,130
State and municipal
Available for sale
Amortized Cost	243,099	243,521
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(43,670)	(41,687)
Fair Value	199,429	201,834
Held to maturity
Amortized Cost	1,039,749	1,048,862
Gross Unrealized Gains	880	958
Gross Unrealized Losses	(191,006)	(183,114)
Fair Value	849,623	866,706
U.S. government agency mortgage-backed securities
Available for sale
Amortized Cost	17,394	17,984
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,932)	(3,441)
Fair Value	14,462	14,543
Held to maturity
Amortized Cost	343,057	349,726
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(47,415)	(54,904)
Fair Value	295,642	294,822
Private labeled mortgage-backed pools
Held to maturity
Amortized Cost	28,558	29,278
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(3,489)	(3,958)
Fair Value	25,069	25,320
Corporate notes
Available for sale
Amortized Cost	18,258	18,259
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,568)	(2,760)
Fair Value	15,690	15,499
Held to maturity
Amortized Cost	156,773	161,599
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(18,392)	(21,309)
Fair Value	$ 138,381	$ 140,290

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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