Securities - Schedule of Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	$ 2,800,229	$ 125,924
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(5,114)	(721)
Available-for-sale debt securities, 12 Months or More, Fair Value	4,618,875	5,532,528
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More	(720,092)	(728,216)
Available-for-sale debt securities fair value, Total	7,419,104	5,658,452
Available-for-sale debt securities, Gross Unrealized Loss, Total	(725,206)	(728,937)
U.S. Treasury securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	0
Available-for-sale debt securities, 12 Months or More, Fair Value	623,757	623,978
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More	(52,534)	(52,313)
Available-for-sale debt securities fair value, Total	623,757	623,978
Available-for-sale debt securities, Gross Unrealized Loss, Total	(52,534)	(52,313)
U.S. government agency and U.S. government-sponsored enterprise debt securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	0
Available-for-sale debt securities, 12 Months or More, Fair Value	260,388	364,446
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More	(49,568)	(47,640)
Available-for-sale debt securities fair value, Total	260,388	364,446
Available-for-sale debt securities, Gross Unrealized Loss, Total	(49,568)	(47,640)
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	0
Available-for-sale debt securities, 12 Months or More, Fair Value	440,214	463,572
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More	(53,547)	(63,276)
Available-for-sale debt securities fair value, Total	440,214	463,572
Available-for-sale debt securities, Gross Unrealized Loss, Total	(53,547)	(63,276)
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	2,778,124	9,402
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(5,016)	(558)
Available-for-sale debt securities, 12 Months or More, Fair Value	1,570,970	1,661,112
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More	(236,075)	(229,155)
Available-for-sale debt securities fair value, Total	4,349,094	1,670,514
Available-for-sale debt securities, Gross Unrealized Loss, Total	(241,091)	(229,713)
Municipal securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	3,337	2,825
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(32)	(15)
Available-for-sale debt securities, 12 Months or More, Fair Value	250,949	254,773
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More	(38,876)	(36,327)
Available-for-sale debt securities fair value, Total	254,286	257,598
Available-for-sale debt securities, Gross Unrealized Loss, Total	(38,908)	(36,342)
Non-agency commercial mortgage-backed securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	2,742
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	(4)
Available-for-sale debt securities, 12 Months or More, Fair Value	320,637	364,774
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More	(39,976)	(42,058)
Available-for-sale debt securities fair value, Total	320,637	367,516
Available-for-sale debt securities, Gross Unrealized Loss, Total	(39,976)	(42,062)
Non-agency residential mortgage-backed securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	0
Available-for-sale debt securities, 12 Months or More, Fair Value	474,618	553,671
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More	(89,796)	(89,664)
Available-for-sale debt securities fair value, Total	474,618	553,671
Available-for-sale debt securities, Gross Unrealized Loss, Total	(89,796)	(89,664)
Corporate debt securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	0
Available-for-sale debt securities, 12 Months or More, Fair Value	507,130	502,425
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More	(146,371)	(151,076)
Available-for-sale debt securities fair value, Total	507,130	502,425
Available-for-sale debt securities, Gross Unrealized Loss, Total	(146,371)	(151,076)
Foreign government bonds
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	18,768	110,955
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	(66)	(144)
Available-for-sale debt securities, 12 Months or More, Fair Value	87,166	88,616
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More	(12,834)	(11,384)
Available-for-sale debt securities fair value, Total	105,934	199,571
Available-for-sale debt securities, Gross Unrealized Loss, Total	(12,900)	(11,528)
Asset-backed securities
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	0
Available-for-sale debt securities, 12 Months or More, Fair Value	38,593	42,300
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More	(468)	(934)
Available-for-sale debt securities fair value, Total	38,593	42,300
Available-for-sale debt securities, Gross Unrealized Loss, Total	(468)	(934)
Collateralized loan obligations (“CLOs”)
Schedule of Available-for-sale Debt Securities
Available-for-sale debt securities, Less than 12 Months, Fair Value	0	0
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months	0	0
Available-for-sale debt securities, 12 Months or More, Fair Value	44,453	612,861
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More	(47)	(4,389)
Available-for-sale debt securities fair value, Total	44,453	612,861
Available-for-sale debt securities, Gross Unrealized Loss, Total	$ (47)	$ (4,389)