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Investment Securities - Schedule of Amortized Cost, Fair Value by Contractual Maturity of Investment Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Investment securities HTM, Fair value |  |
Amortized Cost | $ 2,638,071 |
Investment securities AFS, Amortized cost |  |
Amortized Cost | 7,571,447 | $ 11,091,254
Investment securities AFS, Fair value |  |
Fair Value | 7,043,681 | 9,788,662
Mortgage-backed securities issued by U.S. Government sponsored enterprises |  |
Investment securities HTM, Amortized cost |  |
Within One Year | 0 |
1 to 5 Years | 0 |
5 to 10 Years | 0 |
More Than 10 Years | 2,668,068 |
Amortized cost | 2,668,068 |
Investment securities HTM, Fair value |  |
Within One Year | 0 |
1 to 5 Years | 0 |
5 to 10 Years | 0 |
More Than 10 Years | 2,638,071 |
Amortized Cost | 2,638,071 |
Investment securities AFS, Amortized cost |  |
Within One Year | 0 |
1 to 5 Years | 0 |
5 to 10 Years | 0 |
More Than 10 Years | 2,272,694 |
Amortized Cost | 2,272,694 | 7,523,399
Investment securities AFS, Fair value |  |
Within One Year | 0 |
1 to 5 Years | 0 |
5 to 10 Years | 0 |
More Than 10 Years | 2,016,045 |
Fair Value | 2,016,045 | 6,430,379
U.S. Treasury securities |  |
Investment securities AFS, Amortized cost |  |
Within One Year | 20,101 |
1 to 5 Years | 725,093 |
5 to 10 Years | 431,812 |
More Than 10 Years | 0 |
Amortized Cost | 1,177,006 | 588,082
Investment securities AFS, Fair value |  |
Within One Year | 20,101 |
1 to 5 Years | 723,824 |
5 to 10 Years | 430,370 |
More Than 10 Years | 0 |
Fair Value | 1,174,295 | 597,629
U.S. Government agency securities |  |
Investment securities AFS, Amortized cost |  |
Within One Year | 0 |
1 to 5 Years | 29,993 |
5 to 10 Years | 0 |
More Than 10 Years | 0 |
Amortized Cost | 29,993 | 29,993
Investment securities AFS, Fair value |  |
Within One Year | 0 |
1 to 5 Years | 28,843 |
5 to 10 Years | 0 |
More Than 10 Years | 0 |
Fair Value | 28,843 | 28,940
Mortgage-backed securities issued by U.S. Government agencies |  |
Investment securities AFS, Amortized cost |  |
Within One Year | 0 |
1 to 5 Years | 55 |
5 to 10 Years | 3 |
More Than 10 Years | 1,518,166 |
Amortized Cost | 1,518,224 | 1,021,612
Investment securities AFS, Fair value |  |
Within One Year | 0 |
1 to 5 Years | 53 |
5 to 10 Years | 3 |
More Than 10 Years | 1,400,436 |
Fair Value | 1,400,492 | 925,664
Collateralized mortgage obligations issued by U.S. Government agencies or sponsored enterprises |  |
Investment securities AFS, Amortized cost |  |
Within One Year | 0 |
1 to 5 Years | 34 |
5 to 10 Years | 9,314 |
More Than 10 Years | 650,358 |
Amortized Cost | 659,706 | 692,487
Investment securities AFS, Fair value |  |
Within One Year | 0 |
1 to 5 Years | 33 |
5 to 10 Years | 8,951 |
More Than 10 Years | 539,013 |
Fair Value | 547,997 | 587,595
Commercial mortgage-backed securities issued by U.S. Government agencies or sponsored enterprises |  |
Investment securities AFS, Amortized cost |  |
Within One Year | 0 |
1 to 5 Years | 906,290 |
5 to 10 Years | 981,249 |
More Than 10 Years | 17,226 |
Amortized Cost | 1,904,765 | 1,226,672
Investment securities AFS, Fair value |  |
Within One Year | 0 |
1 to 5 Years | 891,131 |
5 to 10 Years | 961,318 |
More Than 10 Years | 14,677 |
Fair Value | 1,867,126 | 1,209,783
Corporate debt securities and other debt securities |  |
Investment securities AFS, Amortized cost |  |
Within One Year | 0 |
1 to 5 Years | 9,059 |
5 to 10 Years | 0 |
More Than 10 Years | 0 |
Amortized Cost | 9,059 | 9,009
Investment securities AFS, Fair value |  |
Within One Year | 0 |
1 to 5 Years | 8,883 |
5 to 10 Years | 0 |
More Than 10 Years | 0 |
Fair Value | $ 8,883 | $ 8,672

X
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