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INVESTMENT SECURITIES (Investment Securities by Contractual Maturity - AFS) (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 2,597,789 | $ 2,444,135
Gross Unrealized Gains | 38,467 | 9,614
Gross Unrealized Losses | 69,287 | 115,544
Fair Value | $ 2,566,969 | $ 2,338,205
Weighted Average Yield | 4.44% | 4.29%
Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 2,595,652 | $ 2,442,436
Gross Unrealized Gains | 38,466 | 9,613
Gross Unrealized Losses | 69,287 | 115,544
Fair Value | $ 2,564,831 | $ 2,336,505
Weighted Average Yield | 4.44% | 4.29%
US Treasury securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 2,137 | $ 1,699
Gross Unrealized Gains | 1 | 1
Gross Unrealized Losses | 0 | 0
Fair Value | $ 2,138 | $ 1,700
Weighted Average Yield | 3.71% | 4.06%
FNMA and FHLMC certificates | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost |  | $ 1,981,787
Gross Unrealized Gains |  | 5,545
Gross Unrealized Losses |  | 74,451
Fair Value |  | $ 1,912,881
Weighted Average Yield |  | 4.46%
FNMA and FHLMC certificates | Due from 1 to 5 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost |  | $ 14,930
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 587
Fair Value |  | $ 14,343
Weighted Average Yield |  | 2.07%
FNMA and FHLMC certificates | Due from 5 to 10 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost |  | $ 23,664
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 1,415
Fair Value |  | $ 22,249
Weighted Average Yield |  | 1.90%
FNMA and FHLMC certificates | Due after 10 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 2,096,291 | $ 1,943,193
Gross Unrealized Gains | 27,145 | 5,545
Gross Unrealized Losses | 37,277 | 72,449
Fair Value | $ 2,086,159 | $ 1,876,289
Weighted Average Yield | 4.60% | 4.51%
GNMA certificates | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 496,152 | $ 454,881
Gross Unrealized Gains | 11,321 | 4,068
Gross Unrealized Losses | 31,967 | 40,964
Fair Value | $ 475,506 | $ 417,985
Weighted Average Yield | 3.76% | 3.57%
GNMA certificates | Due from 1 to 5 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost |  | $ 6,215
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 177
Fair Value |  | $ 6,038
Weighted Average Yield |  | 1.74%
GNMA certificates | Due from 5 to 10 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 3,155 | $ 11,358
Gross Unrealized Gains | 0 | 10
Gross Unrealized Losses | 59 | 641
Fair Value | $ 3,096 | $ 10,727
Weighted Average Yield | 1.78% | 2.25%
GNMA certificates | Due after 10 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 492,997 | $ 437,308
Gross Unrealized Gains | 11,321 | 4,058
Gross Unrealized Losses | 31,908 | 40,146
Fair Value | $ 472,410 | $ 401,220
Weighted Average Yield | 3.77% | 3.63%
CMOs issued by US government-sponsored agencies | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost |  | $ 5,768
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 129
Fair Value |  | $ 5,639
Weighted Average Yield |  | 2.21%
CMOs issued by US government-sponsored agencies | Due from 1 to 5 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost |  | $ 5,015
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 126
Fair Value |  | $ 4,889
Weighted Average Yield |  | 1.78%
CMOs issued by US government-sponsored agencies | Due after 10 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 3,209 | $ 753
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 43 | 3
Fair Value | $ 3,166 | $ 750
Weighted Average Yield | 2.49% | 5.07%
US Treasury securities | Due less than 1 year | US Treasury securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 1,634 | $ 1,149
Gross Unrealized Gains | 1 | 1
Gross Unrealized Losses | 0 | 0
Fair Value | $ 1,635 | $ 1,150
Weighted Average Yield | 4.13% | 4.85%
Other debt securities | US Treasury securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 503 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | 0 |
Fair Value | $ 503 |
Weighted Average Yield | 2.35% |
Other debt securities | Due from 1 to 5 years | US Treasury securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 500 | $ 550
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | $ 500 | $ 550
Weighted Average Yield | 2.35% | 2.41%
Other debt securities | Due after 10 years | US Treasury securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 3 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | 0 |
Fair Value | $ 3 |
Weighted Average Yield | 2.97% |

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