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Securities - Schedule of Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
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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)

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-5 + Details
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