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INVESTMENT SECURITIES (Unrealized Gains and Losses by Category) (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Securities Available-for-Sale, Fair Value |  |
Less than 12 months | $ 109,570 | $ 875,760
12 months or more | 782,657 | 786,686
Total | 892,227 | 1,662,446
Securities Available-for-Sale, Unrealized Loss |  |
Less than 12 months | 713 | 15,008
12 months or more | 68,574 | 100,536
Total | 69,287 | 115,544
FNMA and FHLMC certificates |  |
Securities Available-for-Sale, Fair Value |  |
Less than 12 months | 99,560 | 791,987
12 months or more | 553,694 | 579,727
Total | 653,254 | 1,371,714
Securities Available-for-Sale, Unrealized Loss |  |
Less than 12 months | 412 | 12,989
12 months or more | 36,865 | 61,462
Total | 37,277 | 74,451
GNMA certificates |  |
Securities Available-for-Sale, Fair Value |  |
Less than 12 months | 10,010 | 83,773
12 months or more | 225,797 | 201,320
Total | 235,807 | 285,093
Securities Available-for-Sale, Unrealized Loss |  |
Less than 12 months | 301 | 2,019
12 months or more | 31,666 | 38,945
Total | 31,967 | 40,964
CMOs issued by US Government-sponsored agencies |  |
Securities Available-for-Sale, Fair Value |  |
Less than 12 months | 0 | 0
12 months or more | 3,166 | 5,639
Total | 3,166 | 5,639
Securities Available-for-Sale, Unrealized Loss |  |
Less than 12 months | 0 | 0
12 months or more | 43 | 129
Total | $ 43 | $ 129

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