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Securities - Investment Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
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Investments, Debt and Equity Securities [Abstract] |  |
Held to Maturity, amortized cost, due in one year or less | $ 28,227 |
Held to Maturity, amortized cost, due after one year through five years | 46,253 |
Held to Maturity, amortized cost, due after five years through ten years | 45,117 |
Held to Maturity, amortized cost, due after ten years | 11,836 |
Held to Maturity, amortized cost, subtotal | 131,433 |
Held to Maturity, amortized cost, mortgage-backed securities and collateralized mortgage obligations | 11,252,059 |
Held to Maturity, Amortized Cost | 11,383,492 | $ 12,365,308
Held to Maturity, fair value, due in one year or less | 28,302 |
Held to Maturity, fair value, due after one year through five years | 45,684 |
Held to Maturity, fair value, due after five years through ten years | 40,099 |
Held to Maturity, fair value, due after ten years | 10,645 |
Held to Maturity, fair value, subtotal | 124,730 |
Held to Maturity, fair value, mortgage-backed securities and collateralized mortgage obligations | 9,867,636 |
Held to Maturity, fair value, total | 9,992,366 | 10,984,598
Available for Sale, amortized cost, due after five years through ten years | 14,350 |
Available for Sale, amortized cost, subtotal | 14,350 |
Available for Sale, amortized cost, mortgage-backed securities and collateralized mortgage obligations | 306,304 |
Available for Sale, Amortized Cost | 320,654 | 440,358
Available for Sale, fair value, due after five years through ten years | 16,080 |
Available for Sale, fair value, subtotal | 16,080 |
Available for Sale, fair value, mortgage-backed securities and collateralized mortgage obligations | 302,567 |
Available for Sale securities, at fair value | $ 318,647 | $ 438,588

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