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Investment Securities - Schedule of Continuous Unrealized Loss (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Fair value |  |
Less than 12 months | $ 85,489 | $ 15,311
12 months or more | 1,298,412 | 2,016,530
Total fair value | 1,383,901 | 2,031,841
Unrealized loss |  |
Less than 12 months | (292) | (937)
12 months or more | (298,109) | (367,045)
Total unrealized loss | (298,401) | (367,982)
Corporate bonds |  |
Fair value |  |
Less than 12 months | 0 | 0
12 months or more | 9,970 | 9,890
Total fair value | 9,970 | 9,890
Unrealized loss |  |
Less than 12 months | 0 | 0
12 months or more | (30) | (110)
Total unrealized loss | (30) | (110)
Agency bond securities |  |
Fair value |  |
Less than 12 months | 0 | 0
12 months or more | 169,018 | 202,496
Total fair value | 169,018 | 202,496
Unrealized loss |  |
Less than 12 months | 0 | 0
12 months or more | (30,208) | (38,132)
Total unrealized loss | (30,208) | (38,132)
Agency mortgage-backed securities |  |
Fair value |  |
Less than 12 months | 85,489 | 15,311
12 months or more | 1,096,475 | 1,781,301
Total fair value | 1,181,964 | 1,796,612
Unrealized loss |  |
Less than 12 months | (292) | (937)
12 months or more | (261,996) | (322,530)
Total unrealized loss | (262,288) | (323,467)
Municipal bonds |  |
Fair value |  |
Less than 12 months | 0 | 0
12 months or more | 22,949 | 22,843
Total fair value | 22,949 | 22,843
Unrealized loss |  |
Less than 12 months | 0 | 0
12 months or more | (5,875) | (6,273)
Total unrealized loss | $ (5,875) | $ (6,273)

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