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Securities - Scheduled Contractual Maturities of ATM and HTM Debt Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Amortized cost |  |
Within One Year | $ 303,496 |
After One Year through Five Years | 958,127 |
After Five Years through Ten Years | 800,818 |
After Ten Years | 4,816,784 |
Amortized Cost | 6,879,225 | $ 10,087,179
Fair value |  |
Within One Year | 302,412 |
After One Year through Five Years | 886,140 |
After Five Years through Ten Years | 707,539 |
After Ten Years | 4,138,902 |
Total | $ 6,034,993 |
Weighted-Average Yield |  |
Within One Year | 3.66% |
After One Year through Five Years | 2.18% |
After Five Years through Ten Years | 2.76% |
After Ten Years | 3.16% |
Total | 3.00% |
Amortized cost |  |
Within One Year | $ 0 |
After One Year through Five Years | 404,252 |
After Five Years through Ten Years | 471,892 |
After Ten Years | 2,125,724 |
Total | 3,001,868 |
Fair value |  |
Within One Year | 0 |
After One Year through Five Years | 364,360 |
After Five Years through Ten Years | 404,155 |
After Ten Years | 1,686,656 |
Total | $ 2,455,171 |
Weighted Average Yield |  |
Within One Year | 0.00% |
After One Year through Five Years | 1.01% |
After Five Years through Ten Years | 1.67% |
After Ten Years | 1.78% |
Total | 1.66% |
U.S. Treasury securities |  |
Amortized cost |  |
Within One Year | $ 0 |
After One Year through Five Years | 576,585 |
After Five Years through Ten Years | 99,721 |
After Ten Years | 0 |
Amortized Cost | 676,306 | 1,049,238
Fair value |  |
Within One Year | 0 |
After One Year through Five Years | 521,174 |
After Five Years through Ten Years | 85,029 |
After Ten Years | 0 |
Total | $ 606,203 |
Weighted-Average Yield |  |
Within One Year | 0.00% |
After One Year through Five Years | 1.28% |
After Five Years through Ten Years | 0.74% |
After Ten Years | 0.00% |
Total | 1.20% |
Amortized cost |  |
Within One Year | $ 0 |
After One Year through Five Years | 404,252 |
After Five Years through Ten Years | 119,829 |
After Ten Years | 0 |
Total | 524,081 |
Fair value |  |
Within One Year | 0 |
After One Year through Five Years | 364,360 |
After Five Years through Ten Years | 107,109 |
After Ten Years | 0 |
Total | $ 471,469 |
Weighted Average Yield |  |
Within One Year | 0.00% |
After One Year through Five Years | 1.01% |
After Five Years through Ten Years | 1.18% |
After Ten Years | 0.00% |
Total | 1.05% |
U.S. government agency and U.S. government-sponsored enterprise debt securities |  |
Amortized cost |  |
Within One Year | $ 100,000 |
After One Year through Five Years | 149,772 |
After Five Years through Ten Years | 100,000 |
After Ten Years | 168,034 |
Amortized Cost | 517,806 | 1,333,984
Fair value |  |
Within One Year | 99,939 |
After One Year through Five Years | 144,796 |
After Five Years through Ten Years | 81,973 |
After Ten Years | 134,899 |
Total | $ 461,607 |
Weighted-Average Yield |  |
Within One Year | 4.97% |
After One Year through Five Years | 3.71% |
After Five Years through Ten Years | 1.26% |
After Ten Years | 2.10% |
Total | 2.96% |
Amortized cost |  |
Within One Year | $ 0 |
After One Year through Five Years | 0 |
After Five Years through Ten Years | 255,967 |
After Ten Years | 743,005 |
Total | 998,972 |
Fair value |  |
Within One Year | 0 |
After One Year through Five Years | 0 |
After Five Years through Ten Years | 216,340 |
After Ten Years | 573,072 |
Total | $ 789,412 |
Weighted Average Yield |  |
Within One Year | 0.00% |
After One Year through Five Years | 0.00% |
After Five Years through Ten Years | 1.94% |
After Ten Years | 1.88% |
Total | 1.90% |
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities |  |
Amortized cost |  |
Within One Year | $ 0 |
After One Year through Five Years | 31,165 |
After Five Years through Ten Years | 161,960 |
After Ten Years | 2,395,321 |
Amortized Cost | 2,588,446 |
Fair value |  |
Within One Year | 0 |
After One Year through Five Years | 29,643 |
After Five Years through Ten Years | 146,737 |
After Ten Years | 2,086,084 |
Total | $ 2,262,464 |
Weighted-Average Yield |  |
Within One Year | 0.00% |
After One Year through Five Years | 3.20% |
After Five Years through Ten Years | 2.69% |
After Ten Years | 3.22% |
Total | 3.19% |
Amortized cost |  |
Within One Year | $ 0 |
After One Year through Five Years | 0 |
After Five Years through Ten Years | 96,096 |
After Ten Years | 1,193,010 |
Total | 1,289,106 |
Fair value |  |
Within One Year | 0 |
After One Year through Five Years | 0 |
After Five Years through Ten Years | 80,706 |
After Ten Years | 961,604 |
Total | $ 1,042,310 |
Weighted Average Yield |  |
Within One Year | 0.00% |
After One Year through Five Years | 0.00% |
After Five Years through Ten Years | 1.56% |
After Ten Years | 1.68% |
Total | 1.67% |
Municipal securities: |  |
Amortized cost |  |
Within One Year | $ 2,307 |
After One Year through Five Years | 34,865 |
After Five Years through Ten Years | 6,847 |
After Ten Years | 259,865 |
Amortized Cost | 303,884 | 519,381
Fair value |  |
Within One Year | 2,283 |
After One Year through Five Years | 32,160 |
After Five Years through Ten Years | 5,780 |
After Ten Years | 216,876 |
Total | $ 257,099 |
Weighted-Average Yield |  |
Within One Year | 2.21% |
After One Year through Five Years | 2.40% |
After Five Years through Ten Years | 1.85% |
After Ten Years | 2.25% |
Total | 2.26% |
Amortized cost |  |
Within One Year | $ 0 |
After One Year through Five Years | 0 |
After Five Years through Ten Years | 0 |
After Ten Years | 189,709 |
Total | 189,709 |
Fair value |  |
Within One Year | 0 |
After One Year through Five Years | 0 |
After Five Years through Ten Years | 0 |
After Ten Years | 151,980 |
Total | $ 151,980 |
Weighted Average Yield |  |
Within One Year | 0.00% |
After One Year through Five Years | 0.00% |
After Five Years through Ten Years | 0.00% |
After Ten Years | 1.98% |
Total | 1.98% |
Non-agency mortgage-backed securities |  |
Amortized cost |  |
Within One Year | $ 57,190 |
After One Year through Five Years | 158,574 |
After Five Years through Ten Years | 22,788 |
After Ten Years | 971,162 |
Amortized Cost | 1,209,714 |
Fair value |  |
Within One Year | 56,222 |
After One Year through Five Years | 151,239 |
After Five Years through Ten Years | 22,000 |
After Ten Years | 818,092 |
Total | $ 1,047,553 |
Weighted-Average Yield |  |
Within One Year | 4.93% |
After One Year through Five Years | 3.78% |
After Five Years through Ten Years | 0.84% |
After Ten Years | 2.45% |
Total | 2.72% |
Corporate debt securities |  |
Amortized cost |  |
Within One Year | $ 10,000 |
After One Year through Five Years | 0 |
After Five Years through Ten Years | 334,502 |
After Ten Years | 329,000 |
Amortized Cost | 673,502 | 657,516
Fair value |  |
Within One Year | 9,856 |
After One Year through Five Years | 0 |
After Five Years through Ten Years | 292,049 |
After Ten Years | 224,369 |
Total | $ 526,274 |
Weighted-Average Yield |  |
Within One Year | 3.77% |
After One Year through Five Years | 0.00% |
After Five Years through Ten Years | 3.59% |
After Ten Years | 1.98% |
Total | 2.81% |
Foreign government bonds |  |
Amortized cost |  |
Within One Year | $ 133,999 |
After One Year through Five Years | 7,166 |
After Five Years through Ten Years | 50,000 |
After Ten Years | 50,000 |
Amortized Cost | 241,165 | 260,447
Fair value |  |
Within One Year | 134,112 |
After One Year through Five Years | 7,128 |
After Five Years through Ten Years | 49,670 |
After Ten Years | 36,143 |
Total | $ 227,053 |
Weighted-Average Yield |  |
Within One Year | 2.15% |
After One Year through Five Years | 2.24% |
After Five Years through Ten Years | 4.18% |
After Ten Years | 1.50% |
Total | 2.44% |
Asset-backed securities |  |
Amortized cost |  |
Within One Year | $ 0 |
After One Year through Five Years | 0 |
After Five Years through Ten Years | 0 |
After Ten Years | 51,152 |
Amortized Cost | 51,152 | 74,674
Fair value |  |
Within One Year | 0 |
After One Year through Five Years | 0 |
After Five Years through Ten Years | 0 |
After Ten Years | 49,076 |
Total | $ 49,076 |
Weighted-Average Yield |  |
Within One Year | 0.00% |
After One Year through Five Years | 0.00% |
After Five Years through Ten Years | 0.00% |
After Ten Years | 5.16% |
Total | 5.16% |
Collateralized loan obligations (“CLOs”) |  |
Amortized cost |  |
Within One Year | $ 0 |
After One Year through Five Years | 0 |
After Five Years through Ten Years | 25,000 |
After Ten Years | 592,250 |
Amortized Cost | 617,250 | $ 592,250
Fair value |  |
Within One Year | 0 |
After One Year through Five Years | 0 |
After Five Years through Ten Years | 24,301 |
After Ten Years | 573,363 |
Total | $ 597,664 |
Weighted-Average Yield |  |
Within One Year | 0.00% |
After One Year through Five Years | 0.00% |
After Five Years through Ten Years | 5.23% |
After Ten Years | 5.40% |
Total | 5.40% |

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