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Securities - Continuous Unrealized Losses (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Schedule of Available-for-sale Debt Securities |  |
Available-for-sale debt securities, Less than 12 Months, Fair Value | $ 2,510,007 | $ 5,932,965
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months | (266,455) | (106,229)
Available-for-sale debt securities, 12 Months or More, Fair Value | 3,258,297 | 1,778,987
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More | (599,568) | (66,622)
Available-for-sale debt securities fair value, Total | 5,768,304 | 7,711,952
Available-for-sale debt securities, Gross Unrealized Loss, Total | (866,023) | (172,851)
U.S. Treasury securities |  |
Schedule of Available-for-sale Debt Securities |  |
Available-for-sale debt securities, Less than 12 Months, Fair Value | 263,772 | 935,776
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months | (25,232) | (14,689)
Available-for-sale debt securities, 12 Months or More, Fair Value | 336,905 | 47,881
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More | (50,403) | (1,998)
Available-for-sale debt securities fair value, Total | 600,677 | 983,657
Available-for-sale debt securities, Gross Unrealized Loss, Total | (75,635) | (16,687)
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 | 88,168 | 773,647
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months | (16,401) | (18,000)
Available-for-sale debt securities, 12 Months or More, Fair Value | 172,256 | 402,907
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More | (42,245) | (16,710)
Available-for-sale debt securities fair value, Total | 260,424 | 1,176,554
Available-for-sale debt securities, Gross Unrealized Loss, Total | (58,646) | (34,710)
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 | 334,460 | 440,734
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months | (39,330) | (13,589)
Available-for-sale debt securities, 12 Months or More, Fair Value | 187,425 | 257,745
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More | (34,127) | (15,265)
Available-for-sale debt securities fair value, Total | 521,885 | 698,479
Available-for-sale debt securities, Gross Unrealized Loss, Total | (73,457) | (28,854)
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 | 700,318 | 2,138,542
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months | (72,088) | (37,691)
Available-for-sale debt securities, 12 Months or More, Fair Value | 1,085,253 | 330,522
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More | (178,332) | (11,444)
Available-for-sale debt securities fair value, Total | 1,785,571 | 2,469,064
Available-for-sale debt securities, Gross Unrealized Loss, Total | (250,420) | (49,135)
Municipal securities |  |
Schedule of Available-for-sale Debt Securities |  |
Available-for-sale debt securities, Less than 12 Months, Fair Value | 203,157 | 177,065
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months | (46,271) | (5,682)
Available-for-sale debt securities, 12 Months or More, Fair Value | 46,345 | 17,003
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More | (11,311) | (606)
Available-for-sale debt securities fair value, Total | 249,502 | 194,068
Available-for-sale debt securities, Gross Unrealized Loss, Total | (57,582) | (6,288)
Non-agency commercial mortgage-backed securities |  |
Schedule of Available-for-sale Debt Securities |  |
Available-for-sale debt securities, Less than 12 Months, Fair Value | 170,101 | 301,925
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months | (8,351) | (4,158)
Available-for-sale debt securities, 12 Months or More, Fair Value | 218,124 | 40,013
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More | (42,637) | (1,319)
Available-for-sale debt securities fair value, Total | 388,225 | 341,938
Available-for-sale debt securities, Gross Unrealized Loss, Total | (50,988) | (5,477)
Non-agency residential mortgage-backed securities |  |
Schedule of Available-for-sale Debt Securities |  |
Available-for-sale debt securities, Less than 12 Months, Fair Value | 188,584 | 707,792
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months | (23,168) | (8,966)
Available-for-sale debt securities, 12 Months or More, Fair Value | 482,954 | 6,431
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More | (89,994) | (11)
Available-for-sale debt securities fair value, Total | 671,538 | 714,223
Available-for-sale debt securities, Gross Unrealized Loss, Total | (113,162) | (8,977)
Corporate debt securities |  |
Schedule of Available-for-sale Debt Securities |  |
Available-for-sale debt securities, Less than 12 Months, Fair Value | 247,533 | 183,916
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months | (24,969) | (3,084)
Available-for-sale debt securities, 12 Months or More, Fair Value | 282,032 | 251,494
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More | (118,968) | (13,505)
Available-for-sale debt securities fair value, Total | 529,565 | 435,410
Available-for-sale debt securities, Gross Unrealized Loss, Total | (143,937) | (16,589)
Foreign government bonds |  |
Schedule of Available-for-sale Debt Securities |  |
Available-for-sale debt securities, Less than 12 Months, Fair Value | 68,733 | 27,097
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months | (336) | (5)
Available-for-sale debt securities, 12 Months or More, Fair Value | 36,899 | 133,279
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More | (13,102) | (3,476)
Available-for-sale debt securities fair value, Total | 105,632 | 160,376
Available-for-sale debt securities, Gross Unrealized Loss, Total | (13,438) | (3,481)
Asset-backed securities |  |
Schedule of Available-for-sale Debt Securities |  |
Available-for-sale debt securities, Less than 12 Months, Fair Value | 54,811 | 24,885
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months | (1,579) | (301)
Available-for-sale debt securities, 12 Months or More, Fair Value | 10,059 | 0
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More | (344) | 0
Available-for-sale debt securities fair value, Total | 64,870 | 24,885
Available-for-sale debt securities, Gross Unrealized Loss, Total | (1,923) | (301)
Collateralized loan obligations (“CLOs”) |  |
Schedule of Available-for-sale Debt Securities |  |
Available-for-sale debt securities, Less than 12 Months, Fair Value | 190,370 | 221,586
Available-for-sale debt securities, Gross Unrealized Loss, Less than 12 Months | (8,730) | (64)
Available-for-sale debt securities, 12 Months or More, Fair Value | 400,045 | 291,712
Available-for-sale debt securities, Gross Unrealized Loss, 12 Months or More | (18,105) | (2,288)
Available-for-sale debt securities fair value, Total | 590,415 | 513,298
Available-for-sale debt securities, Gross Unrealized Loss, Total | $ (26,835) | $ (2,352)

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