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Investment Securities, AFS and HTM Securities Gross Unrealized Losses (Details)
$ in Thousands
Jun. 30, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
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 35 141
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (688) $ (14,323)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 128,798 $ 1,694,159
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 54 54
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (13,682) $ (15,890)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 252,471 259,134
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (14,370) (30,213)
Debt Securities, Available-for-sale, Unrealized Loss Position 381,269 1,953,294
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 (17,397) (13,665)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 528,754 529,064
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (552,590) (582,241)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 2,514,312 2,519,595
Total unrealized losses on held to maturity securities (569,986) (595,906)
Total fair value of unrealized losses on held to maturity securities $ 3,043,067 3,048,660
US Treasury Securities    
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
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value   0
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss   (1)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value   999
Total unrealized losses on held to maturity securities   (1)
Total fair value of unrealized losses on held to maturity securities   $ 999
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 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ 0 $ (3)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 545 $ 542
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 2 2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (71) $ (55)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 812 828
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (71) (58)
Debt Securities, Available-for-sale, Unrealized Loss Position 1,357 1,370
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 (16,718) (11,860)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 486,300 483,073
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (184,912) (162,343)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 863,436 866,949
Total unrealized losses on held to maturity securities (201,630) (174,202)
Total fair value of unrealized losses on held to maturity securities 1,349,736 1,350,022
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 (58,290) (65,963)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 262,536 266,353
Total unrealized losses on held to maturity securities (58,290) (65,963)
Total fair value of unrealized losses on held to maturity securities $ 262,536 $ 266,353
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 3 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (389) $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 41,906 $ 0
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 $ (1,300) $ (604)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 58,583 62,830
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (1,689) (604)
Debt Securities, Available-for-sale, Unrealized Loss Position $ 100,489 $ 62,830
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 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 4 4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (17) $ (24)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 369 464
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (17) (24)
Debt Securities, Available-for-sale, Unrealized Loss Position $ 369 $ 464
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 1 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (2) $ (7)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 998 $ 993
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 0 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ 0 $ (3)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 0 997
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (2) (11)
Debt Securities, Available-for-sale, Unrealized Loss Position $ 998 $ 1,989
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 19 23
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (216) $ (607)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 25,111 $ 31,983
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 14 14
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (6,509) $ (8,927)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 60,428 61,596
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (6,725) (9,534)
Debt Securities, Available-for-sale, Unrealized Loss Position 85,538 93,579
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 (110) (280)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 8,687 11,617
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (168,271) (186,184)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 695,891 710,114
Total unrealized losses on held to maturity securities (168,381) (186,464)
Total fair value of unrealized losses on held to maturity securities $ 704,578 $ 721,732
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 $ (1,210) $ (1,332)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 16,937 17,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (1,210) (1,332)
Debt Securities, Available-for-sale, Unrealized Loss Position 16,937 17,000
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 (481) (1,343)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 26,335 25,518
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (132,664) (157,735)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 618,087 598,077
Total unrealized losses on held to maturity securities (133,145) (159,078)
Total fair value of unrealized losses on held to maturity securities $ 644,422 $ 623,595
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 11 116
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (81) $ (13,706)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 60,239 $ 1,660,642
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security 5 4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (81) $ (145)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 4,956 3,945
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (162) (13,851)
Debt Securities, Available-for-sale, Unrealized Loss Position 65,195 1,664,587
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 (88) (183)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 7,432 8,856
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss (2,816) (3,591)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 30,402 31,071
Total unrealized losses on held to maturity securities (2,904) (3,774)
Total fair value of unrealized losses on held to maturity securities $ 37,835 $ 39,927
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 16 16
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (4,495) $ (4,800)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 110,386 111,475
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss (4,495) (4,800)
Debt Securities, Available-for-sale, Unrealized Loss Position 110,386 111,475
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 (5,637) (6,424)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value 43,959 46,032
Total unrealized losses on held to maturity securities (5,637) (6,424)
Total fair value of unrealized losses on held to maturity securities $ 43,959 $ 46,032
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 360 391
Held to maturity, number of securities, less than 12 months | US Treasury Securities    
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
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 343 370
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 9 12
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 6 7
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 910 901
Held to maturity, number of securities, 12 months or more | US Treasury Securities    
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]    
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security   1
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 651 641
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 106 106
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 79
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