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Debt Securities - Maturity Schedule (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Available-for-Sale, Amortized Cost |  |
Due within one year | $ 54,460 |
Due after one year through five years | 1,143,487 |
Due after five years through ten years | 815,328 |
Due after ten years | 221,694 |
Total before mortgage-backed securities | 2,234,969 |
Mortgage-backed securities | 6,940,454 |
Amortized Cost | 9,175,423 | $ 5,145,866
Available-for-Sale, Fair Value |  |
Due within one year | 54,824 |
Due after one year through five years | 1,146,529 |
Due after five years through ten years | 816,598 |
Due after ten years | 239,101 |
Total before mortgage-backed securities | 2,257,052 |
Mortgage-backed securities | 6,913,797 |
Fair Value | 9,170,849 | 5,337,814
Held-to-Maturity, Amortized Cost |  |
Due within one year | 1,432 |
Due after one year through five years | 29,286 |
Due after five years through ten years | 91,688 |
Due after ten years | 1,076,758 |
Total before mortgage-backed securities | 1,199,164 |
Mortgage-backed securities | 0 |
Amortized Cost | 1,199,164 | 189,836
Held-to-Maturity, Fair Value |  |
Due within one year | 1,445 |
Due after one year through five years | 30,932 |
Due after five years through ten years | 96,253 |
Due after ten years | 1,092,253 |
Total before mortgage-backed securities | 1,220,883 |
Mortgage-backed securities | 0 |
Fair Value | $ 1,220,883 | $ 203,216

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