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Securities - Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Securities, held-to-maturity, Amortized Cost	$ 51,509	$ 51,838
Securities held-to-maturity, Allowance for Credit Losses	(359)	(353)	$ (1,084)	$ (1,087)
Securities held-to-maturity, Net Carrying Amount	51,150	51,485
Securities held-to-maturity, Gross Unrecognized Losses	(6,480)	(6,767)
Securities held-to-maturity, Fair Value	44,670	44,718
Total Securities available for sale, before allowance for credit losses	1,454,886	1,506,798
Total Securities available for sale, Allowance for Credit Losses	(2,627)	(2,627)	$ 0
Total Securities available for sale, Gross Unrealized Gains	5,819	3,069
Total Securities available for sale, Gross Unrealized Losses	(7,934)	(9,335)
Total Securities available for sale, Fair Value	1,450,144	1,497,905
Total other securities
Total Securities available for sale, before allowance for credit losses	578,769	593,928
Total Securities available for sale, Allowance for Credit Losses	(2,627)	(2,627)
Total Securities available for sale, Gross Unrealized Gains	1,541	1,938
Total Securities available for sale, Gross Unrealized Losses	(7,105)	(6,970)
Total Securities available for sale, Fair Value	570,578	586,269
Municipals
Securities, held-to-maturity, Amortized Cost	43,678	44,002
Securities held-to-maturity, Allowance for Credit Losses	(359)	(353)
Securities held-to-maturity, Net Carrying Amount	43,319	43,649
Securities held-to-maturity, Gross Unrecognized Losses	(5,736)	(5,834)
Securities held-to-maturity, Fair Value	37,583	37,815
Total Securities available for sale, before allowance for credit losses	20,627	20,627
Total Securities available for sale, Allowance for Credit Losses	(2,627)	(2,627)
Total Securities available for sale, Fair Value	18,000	18,000
U.S. government agencies
Total Securities available for sale, before allowance for credit losses	7,918	8,804
Total Securities available for sale, Gross Unrealized Gains	36	77
Total Securities available for sale, Gross Unrealized Losses	(43)	(33)
Total Securities available for sale, Fair Value	7,911	8,848
Corporate
Total Securities available for sale, before allowance for credit losses	130,928	130,882
Total Securities available for sale, Gross Unrealized Gains	823	735
Total Securities available for sale, Gross Unrealized Losses	(5,677)	(6,368)
Total Securities available for sale, Fair Value	126,074	125,249
Mutual funds
Total Securities available for sale, before allowance for credit losses	12,160	11,890
Total Securities available for sale, Fair Value	12,160	11,890
Collateralized loan obligations
Total Securities available for sale, before allowance for credit losses	405,662	420,260
Total Securities available for sale, Gross Unrealized Gains	682	1,126
Total Securities available for sale, Gross Unrealized Losses	(1,385)	(569)
Total Securities available for sale, Fair Value	404,959	420,817
Other
Total Securities available for sale, before allowance for credit losses	1,474	1,465
Total Securities available for sale, Fair Value	1,474	1,465
Collateralized Mortgage Backed Securities
Total Securities available for sale, before allowance for credit losses	876,117	912,870
Total Securities available for sale, Gross Unrealized Gains	4,278	1,131
Total Securities available for sale, Gross Unrealized Losses	(829)	(2,365)
Total Securities available for sale, Fair Value	879,566	911,636
REMIC and CMO
Total Securities available for sale, before allowance for credit losses	676,300	707,540
Total Securities available for sale, Gross Unrealized Gains	2,653	1,107
Total Securities available for sale, Gross Unrealized Losses	(764)	(1,067)
Total Securities available for sale, Fair Value	678,189	707,580
GNMA
Total Securities available for sale, before allowance for credit losses	29,418	30,099
Total Securities available for sale, Gross Unrealized Gains	121
Total Securities available for sale, Gross Unrealized Losses	(12)	(154)
Total Securities available for sale, Fair Value	29,527	29,945
FNMA
Securities, held-to-maturity, Amortized Cost	7,831	7,836
Securities held-to-maturity, Net Carrying Amount	7,831	7,836
Securities held-to-maturity, Gross Unrecognized Losses	(744)	(933)
Securities held-to-maturity, Fair Value	7,087	6,903
Total Securities available for sale, before allowance for credit losses	96,396	99,183
Total Securities available for sale, Gross Unrealized Gains	739	11
Total Securities available for sale, Gross Unrealized Losses	(53)	(1,048)
Total Securities available for sale, Fair Value	97,082	98,146
FHLMC
Total Securities available for sale, before allowance for credit losses	74,003	76,048
Total Securities available for sale, Gross Unrealized Gains	765	13
Total Securities available for sale, Gross Unrealized Losses		(96)
Total Securities available for sale, Fair Value	$ 74,768	$ 75,965

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