Investment Securities, AFS and HTM Securities Gross Unrealized Losses (Details) $ in Thousands	Jun. 30, 2024 USD ($) security	Dec. 31, 2023 USD ($) 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	119	82
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (9,664)	$ (4,773)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,472,139	$ 307,527
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	270	213
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (184,017)	$ (168,728)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,535,583	1,392,635
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(193,681)	(173,501)
Debt Securities, Available-for-sale, Unrealized Loss Position	3,007,721	1,700,162
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(8,747)	(2,184)
Fair value of unrealized losses on held to maturity securities, less than 12 months	454,813	220,865
Unrealized losses on held to maturity securities, 12 months or more	(590,538)	(533,046)
Fair value of unrealized losses on held to maturity securities, 12 months or more	2,667,200	2,566,468
Total unrealized losses on held to maturity securities	(599,286)	(535,230)
Total fair value of unrealized losses on held to maturity securities	$ 3,122,012	$ 2,787,333
US Treasury 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	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	$ (4,349)	$ (4,083)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	35,638	35,902
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(4,349)	(4,083)
Debt Securities, Available-for-sale, Unrealized Loss Position	35,638	35,902
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	0	0
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	0
Unrealized losses on held to maturity securities, 12 months or more	(22)	(36)
Fair value of unrealized losses on held to maturity securities, 12 months or more	978	963
Total unrealized losses on held to maturity securities	(22)	(36)
Total fair value of unrealized losses on held to maturity securities	$ 978	$ 963
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	25	41
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (383)	$ (347)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 11,594	$ 23,762
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	112	92
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (3,986)	$ (1,867)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	65,278	53,022
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(4,369)	(2,214)
Debt Securities, Available-for-sale, Unrealized Loss Position	76,872	76,784
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(8,558)	(1,535)
Fair value of unrealized losses on held to maturity securities, less than 12 months	443,724	180,270
Unrealized losses on held to maturity securities, 12 months or more	(163,676)	(132,518)
Fair value of unrealized losses on held to maturity securities, 12 months or more	929,232	792,940
Total unrealized losses on held to maturity securities	(172,235)	(134,053)
Total fair value of unrealized losses on held to maturity securities	1,372,956	973,210
Mortgage-backed Securities, Issued by Private Enterprises [Member]
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	0	0
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	0
Unrealized losses on held to maturity securities, 12 months or more	(70,211)	(65,372)
Fair value of unrealized losses on held to maturity securities, 12 months or more	273,892	289,507
Total unrealized losses on held to maturity securities	(70,211)	(65,372)
Total fair value of unrealized losses on held to maturity securities	$ 273,892	$ 289,507
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	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (72)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 38,384	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	12	14
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (925)	$ (1,862)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	71,409	125,339
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(998)	(1,862)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 109,792	$ 125,339
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	5	5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (27)	$ (28)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	612	761
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(27)	(28)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 612	$ 761
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	0	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ (9)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 991
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	3	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (27)	$ (42)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,973	1,958
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(27)	(50)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 2,973	$ 2,950
US Government Sponsored-Enterprise Insured Loans | Residential Related 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	17	18
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (373)	$ (333)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 25,524	$ 22,870
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	87	71
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (160,306)	$ (153,219)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,025,295	1,080,337
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(160,678)	(153,552)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,050,819	1,103,207
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(52)	(511)
Fair value of unrealized losses on held to maturity securities, less than 12 months	2,581	30,323
Unrealized losses on held to maturity securities, 12 months or more	(188,281)	(164,076)
Fair value of unrealized losses on held to maturity securities, 12 months or more	750,852	771,042
Total unrealized losses on held to maturity securities	(188,333)	(164,587)
Total fair value of unrealized losses on held to maturity securities	$ 753,432	$ 801,365
US Government Sponsored-Enterprise Insured Loans | Commercial mortgage-related 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	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	$ (1,230)	$ (1,755)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	17,283	16,937
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,230)	(1,755)
Debt Securities, Available-for-sale, Unrealized Loss Position	17,283	16,937
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	0	(121)
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	8,144
Unrealized losses on held to maturity securities, 12 months or more	(157,363)	(160,660)
Fair value of unrealized losses on held to maturity securities, 12 months or more	630,783	624,770
Total unrealized losses on held to maturity securities	(157,363)	(160,781)
Total fair value of unrealized losses on held to maturity securities	$ 630,783	$ 632,914
Government National Mortgage Association (GNMA) [Member] | Residential Related 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	75	13
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (8,837)	$ (924)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,396,637	$ 156,847
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	18	5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (4,709)	$ (1,898)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	167,297	26,643
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(13,545)	(2,822)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,563,934	183,490
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(138)	(17)
Fair value of unrealized losses on held to maturity securities, less than 12 months	8,508	2,128
Unrealized losses on held to maturity securities, 12 months or more	(3,729)	(2,884)
Fair value of unrealized losses on held to maturity securities, 12 months or more	34,028	34,626
Total unrealized losses on held to maturity securities	(3,866)	(2,901)
Total fair value of unrealized losses on held to maturity securities	$ 42,536	$ 36,754
Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related 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	0	9
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ (3,160)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 103,055
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	31	22
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (8,458)	$ (3,975)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	149,799	51,738
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(8,458)	(7,135)
Debt Securities, Available-for-sale, Unrealized Loss Position	149,799	154,793
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	0	0
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	0
Unrealized losses on held to maturity securities, 12 months or more	(7,256)	(7,500)
Fair value of unrealized losses on held to maturity securities, 12 months or more	47,436	52,619
Total unrealized losses on held to maturity securities	(7,256)	(7,500)
Total fair value of unrealized losses on held to maturity securities	$ 47,436	$ 52,619
Held to maturity, number of securities, less than 12 months
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	371	205
Held to maturity, number of securities, less than 12 months | US Treasury Securities
HTM investment securities
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 States and Political Subdivisions Debt Securities [Member]
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	360	182
Held to maturity, number of securities, less than 12 months | Mortgage-backed Securities, Issued by Private Enterprises [Member]
HTM investment securities
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 Related Securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	5	20
Held to maturity, number of securities, less than 12 months | US Government Sponsored-Enterprise Insured Loans | Commercial mortgage-related securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	0	1
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Residential Related Securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	6	2
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities
HTM investment securities
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
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	959	785
Held to maturity, number of securities, 12 months or more | US Treasury Securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	1	1
Held to maturity, number of securities, 12 months or more | US States and Political Subdivisions Debt Securities [Member]
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	688	537
Held to maturity, number of securities, 12 months or more | Mortgage-backed Securities, Issued by Private Enterprises [Member]
HTM investment securities
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 Related Securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	114	94
Held to maturity, number of securities, 12 months or more | US Government Sponsored-Enterprise Insured Loans | Commercial mortgage-related securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	45	44
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Residential Related Securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	80	78
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities
HTM investment securities
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	13	13