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Securities - Schedule of Book Values and Fair Values of Investment Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Amortized Cost |  |
Due within one year | $ 25,078 |
Due after one year but within five years | 176,932 |
Due after five years but within ten years | 87,707 |
Due after ten years | 1,000 |
Mortgage-backed securities | 2,467,839 |
Amortized Cost | 2,758,556 | $ 2,662,481
Fair Value |  |
Due within one year | 25,036 |
Due after one year but within five years | 171,224 |
Due after five years but within ten years | 72,348 |
Due after ten years | 885 |
Mortgage-backed securities | 2,045,000 |
Total securities | 2,314,493 | 2,630,414
Amortized Cost |  |
Due within one year | 0 |
Due after one year but within five years | 997 |
Due after five years but within ten years | 61,509 |
Due after ten years | 464,044 |
Mortgage-backed securities | 15,150 |
Amortized Cost | 541,700 | 513,825
Fair Value |  |
Due within one year | 0 |
Due after one year but within five years | 873 |
Due after five years but within ten years | 50,726 |
Due after ten years | 366,708 |
Mortgage-backed securities | 14,221 |
Total securities | $ 432,528 | $ 511,699

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