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Investment Securities - Continuous Unrealized Loss (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair value |  |
Less than 12 months | $ 15,311 | $ 0
12 months or more | 2,016,530 | 2,234,762
Total fair value | 2,031,841 | 2,234,762
Unrealized loss |  |
Less than 12 months | (937) | 0
12 months or more | (367,045) | (380,265)
Total unrealized loss | (367,982) | (380,265)
Corporate bonds |  |
Fair value |  |
Less than 12 months | 0 | 0
12 months or more | 9,890 | 9,626
Total fair value | 9,890 | 9,626
Unrealized loss |  |
Less than 12 months | 0 | 0
12 months or more | (110) | (374)
Total unrealized loss | (110) | (374)
Agency bond securities |  |
Fair value |  |
Less than 12 months | 0 | 0
12 months or more | 202,496 | 200,230
Total fair value | 202,496 | 200,230
Unrealized loss |  |
Less than 12 months | 0 | 0
12 months or more | (38,132) | (40,217)
Total unrealized loss | (38,132) | (40,217)
Agency mortgage-backed securities |  |
Fair value |  |
Less than 12 months | 15,311 | 0
12 months or more | 1,781,301 | 2,001,270
Total fair value | 1,796,612 | 2,001,270
Unrealized loss |  |
Less than 12 months | (937) | 0
12 months or more | (322,530) | (333,901)
Total unrealized loss | (323,467) | (333,901)
Municipal bonds |  |
Fair value |  |
Less than 12 months | 0 | 0
12 months or more | 22,843 | 23,636
Total fair value | 22,843 | 23,636
Unrealized loss |  |
Less than 12 months | 0 | 0
12 months or more | (6,273) | (5,773)
Total unrealized loss | $ (6,273) | $ (5,773)

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