Investment Securities, AFS and HTM Securities Gross Unrealized Losses (Details) $ in Thousands	Mar. 31, 2026 USD ($) security	Dec. 31, 2025 USD ($) security
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	125	32
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (8,975)	$ (481)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,350,622	$ 193,126
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	37	47
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (11,871)	$ (11,070)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	226,773	242,062
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(20,846)	(11,551)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,577,395	435,188
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(18,462)	(3,448)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	680,934	116,143
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(431,284)	(411,622)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	2,192,493	2,472,681
Total unrealized losses on held to maturity securities	(449,746)	(415,070)
Total fair value of unrealized losses on held to maturity securities	$ 2,873,427	$ 2,588,824
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	1	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (36)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 597	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	1	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (8)	$ (20)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	242	863
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(44)	(20)
Debt Securities, Available-for-sale, Unrealized Loss Position	839	863
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(17,977)	(2,978)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	636,009	89,826
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(139,250)	(120,878)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	594,738	842,485
Total unrealized losses on held to maturity securities	(157,227)	(123,856)
Total fair value of unrealized losses on held to maturity securities	1,230,747	932,311
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(44,962)	(43,990)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	253,234	258,827
Total unrealized losses on held to maturity securities	(44,962)	(43,990)
Total fair value of unrealized losses on held to maturity securities	$ 253,234	$ 258,827
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	2	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (92)	$ (152)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 28,630	$ 33,239
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	12	12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (944)	$ (798)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	53,560	55,565
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,036)	(950)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 82,190	$ 88,804
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	1	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (183)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 26,816	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	1	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (4)	$ (14)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	73	231
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(187)	(14)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 26,889	$ 231
Other Debt securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	2	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (2)	$ (2)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,998	$ 1,998
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(2)	(2)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 1,998	$ 1,998
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	28	12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (505)	$ (95)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 36,416	$ 14,155
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	5	12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (5,376)	$ (5,398)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	45,914	56,215
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(5,881)	(5,493)
Debt Securities, Available-for-sale, Unrealized Loss Position	82,330	70,370
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(125)	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	14,542	30
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(129,114)	(127,333)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	655,718	676,915
Total unrealized losses on held to maturity securities	(129,239)	(127,333)
Total fair value of unrealized losses on held to maturity securities	$ 670,260	$ 676,945
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	1	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (928)	$ (1,001)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	16,937	16,958
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(928)	(1,001)
Debt Securities, Available-for-sale, Unrealized Loss Position	16,937	16,958
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(321)	(470)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	26,403	26,287
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(111,279)	(112,534)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	623,406	624,079
Total unrealized losses on held to maturity securities	(111,600)	(113,004)
Total fair value of unrealized losses on held to maturity securities	$ 649,809	$ 650,366
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	91	16
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (8,157)	$ (232)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,256,165	$ 143,734
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	2	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (32)	$ (21)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,915	2,674
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(8,189)	(253)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,258,080	146,408
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(39)	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	3,980	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(2,326)	(2,321)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	27,441	30,237
Total unrealized losses on held to maturity securities	(2,365)	(2,321)
Total fair value of unrealized losses on held to maturity securities	$ 31,421	$ 30,237
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	15	15
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (4,579)	$ (3,818)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	108,132	109,556
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(4,579)	(3,818)
Debt Securities, Available-for-sale, Unrealized Loss Position	108,132	109,556
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(4,353)	(4,566)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	37,956	40,138
Total unrealized losses on held to maturity securities	(4,353)	(4,566)
Total fair value of unrealized losses on held to maturity securities	$ 37,956	$ 40,138
Held to maturity, number of securities, less than 12 months
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	476	84
Held to maturity, number of securities, less than 12 months | US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	455	81
Held to maturity, number of securities, less than 12 months | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	0	0
Held to maturity, number of securities, less than 12 months | US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	17	1
Held to maturity, number of securities, less than 12 months | US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	2	2
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	2	0
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	0	0
Held to maturity, number of securities, 12 months or more
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	656	799
Held to maturity, number of securities, 12 months or more | US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	407	543
Held to maturity, number of securities, 12 months or more | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	18	18
Held to maturity, number of securities, 12 months or more | US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	96	102
Held to maturity, number of securities, 12 months or more | US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	43	43
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	79	80
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	13	13