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Investments Securities - Schedule of Investments by Contractual Maturity (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
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Investments in AFS debt securities—Amortized cost: |  |
Due Within One Year | $ 470,348 |
Due After One Year Through Five Years | 20,019 |
Due After Five Years Through Ten Years | 14,019 |
Due After Ten Years | 335,550 |
Amortized Cost | $ 839,936 | $ 596,757
Weighted average yield for investments in AFS debt securities |  |
Due Within One Year | 6.14% |
Due After One Year Through Five Years | 1.33% |
Due After Five Years Through Ten Years | 1.47% |
Due After Ten Years | 2.80% |
Total | 5.11% |
AFS investment securities—Fair value: |  |
Due Within One Year | $ 469,858 |
Due After One Year Through Five Years | 19,329 |
Due After Five Years Through Ten Years | 13,477 |
Due After Ten Years | 334,366 |
Total | 837,030 |
Accrued Interest | 1,476 | 639
U.S. Treasury securities |  |
Investments in AFS debt securities—Amortized cost: |  |
Due Within One Year | 459,383 |
Due After One Year Through Five Years | 6,376 |
Due After Five Years Through Ten Years | 0 |
Due After Ten Years | 0 |
Amortized Cost | 465,759 | 518,673
AFS investment securities—Fair value: |  |
Due Within One Year | 459,077 |
Due After One Year Through Five Years | 6,135 |
Due After Five Years Through Ten Years | 0 |
Due After Ten Years | 0 |
Total | 465,212 |
Accrued Interest | 279 | 206
Corporate bonds |  |
Investments in AFS debt securities—Amortized cost: |  |
Due Within One Year | 10,965 |
Due After One Year Through Five Years | 9,429 |
Due After Five Years Through Ten Years | 3,298 |
Due After Ten Years | 0 |
Amortized Cost | 23,692 | 32,609
AFS investment securities—Fair value: |  |
Due Within One Year | 10,781 |
Due After One Year Through Five Years | 9,079 |
Due After Five Years Through Ten Years | 2,922 |
Due After Ten Years | 0 |
Total | 22,782 |
Accrued Interest | 153 | 207
Agency mortgage-backed securities |  |
Investments in AFS debt securities—Amortized cost: |  |
Due Within One Year | 0 |
Due After One Year Through Five Years | 122 |
Due After Five Years Through Ten Years | 10,721 |
Due After Ten Years | 334,608 |
Amortized Cost | 345,451 | 28,714
AFS investment securities—Fair value: |  |
Due Within One Year | 0 |
Due After One Year Through Five Years | 115 |
Due After Five Years Through Ten Years | 10,555 |
Due After Ten Years | 333,595 |
Total | 344,265 |
Accrued Interest | 1,039 | 111
Other asset-backed securities |  |
Investments in AFS debt securities—Amortized cost: |  |
Due Within One Year | 0 |
Due After One Year Through Five Years | 4,092 |
Due After Five Years Through Ten Years | 0 |
Due After Ten Years | 0 |
Amortized Cost | 4,092 | 7,272
AFS investment securities—Fair value: |  |
Due Within One Year | 0 |
Due After One Year Through Five Years | 4,000 |
Due After Five Years Through Ten Years | 0 |
Due After Ten Years | 0 |
Total | 4,000 |
Accrued Interest | 1 | 4
Other |  |
Investments in AFS debt securities—Amortized cost: |  |
Due Within One Year | 0 |
Due After One Year Through Five Years | 0 |
Due After Five Years Through Ten Years | 0 |
Due After Ten Years | 942 |
Amortized Cost | 942 | 941
AFS investment securities—Fair value: |  |
Due Within One Year | 0 |
Due After One Year Through Five Years | 0 |
Due After Five Years Through Ten Years | 0 |
Due After Ten Years | 771 |
Total | 771 |
Accrued Interest | $ 4 | $ 8

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