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Investment Securities - Held-to-Maturity with Unrecognized Losses (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value |  |
Less than 12 months | $ 37,007 | $ 0
12 months or longer | 2,402,361 | 2,530,274
Total | 2,439,368 | 2,530,274
Unrecognized Losses |  |
Less than 12 months | (430) | 0
12 months or longer | (483,630) | (414,105)
Total | (484,060) | (414,105)
U.S. government-sponsored entities and agencies |  |
Fair Value |  |
Less than 12 months | 0 | 0
12 months or longer | 664,331 | 671,126
Total | 664,331 | 671,126
Unrecognized Losses |  |
Less than 12 months | 0 | 0
12 months or longer | (168,653) | (154,827)
Total | (168,653) | (154,827)
Mortgage-backed securities |  |
Fair Value |  |
Less than 12 months | 0 | 0
12 months or longer | 800,666 | 881,994
Total | 800,666 | 881,994
Unrecognized Losses |  |
Less than 12 months | 0 | 0
12 months or longer | (169,546) | (147,137)
Total | (169,546) | (147,137)
States and political subdivisions |  |
Fair Value |  |
Less than 12 months | 37,007 | 0
12 months or longer | 937,364 | 977,154
Total | 974,371 | 977,154
Unrecognized Losses |  |
Less than 12 months | (430) | 0
12 months or longer | (145,431) | (112,141)
Total | $ (145,861) | $ (112,141)

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