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Investment Securities - Held-to-Maturity with Unrecognized Losses (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value |  |
Less than 12 months | $ 25,998 | $ 0
12 months or longer | 2,443,259 | 2,530,274
Total | 2,469,257 | 2,530,274
Unrecognized Losses |  |
Less than 12 months | (231) | 0
12 months or longer | (474,185) | (414,105)
Total | (474,416) | (414,105)
U.S. government-sponsored entities and agencies |  |
Fair Value |  |
Less than 12 months | 0 | 0
12 months or longer | 662,331 | 671,126
Total | 662,331 | 671,126
Unrecognized Losses |  |
Less than 12 months | 0 | 0
12 months or longer | (167,071) | (154,827)
Total | (167,071) | (154,827)
Mortgage-backed securities |  |
Fair Value |  |
Less than 12 months | 0 | 0
12 months or longer | 838,289 | 881,994
Total | 838,289 | 881,994
Unrecognized Losses |  |
Less than 12 months | 0 | 0
12 months or longer | (163,626) | (147,137)
Total | (163,626) | (147,137)
States and political subdivisions |  |
Fair Value |  |
Less than 12 months | 25,998 | 0
12 months or longer | 942,639 | 977,154
Total | 968,637 | 977,154
Unrecognized Losses |  |
Less than 12 months | (231) | 0
12 months or longer | (143,488) | (112,141)
Total | $ (143,719) | $ (112,141)

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