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INVESTMENT SECURITIES (Investment Securities by Contractual Maturity - AFS) (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 2,267,582 | $ 2,177,761
Gross Unrealized Gains | 32,887 | 13,476
Gross Unrealized Losses | 70,367 | 91,973
Fair Value | $ 2,230,102 | $ 2,099,264
Weighted Average Yield | 4.19% | 4.07%
Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 2,265,879 | $ 1,880,395
Gross Unrealized Gains | 32,886 | 13,424
Gross Unrealized Losses | 70,366 | 91,970
Fair Value | $ 2,228,399 | $ 1,801,849
Weighted Average Yield | 4.19% | 3.86%
Investment securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 1,703 | $ 297,366
Gross Unrealized Gains | 1 | 52
Gross Unrealized Losses | 1 | 3
Fair Value | $ 1,703 | $ 297,415
Weighted Average Yield | 4.32% | 5.39%
FNMA and FHLMC certificates | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 1,815,924 | $ 1,464,134
Gross Unrealized Gains | 23,652 | 8,989
Gross Unrealized Losses | 40,594 | 57,178
Fair Value | $ 1,798,982 | $ 1,415,945
Weighted Average Yield | 4.36% | 4.03%
FNMA and FHLMC certificates | Due from 1 to 5 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 13,748 | $ 6,972
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 427 | 311
Fair Value | $ 13,321 | $ 6,661
Weighted Average Yield | 2.08% | 1.76%
FNMA and FHLMC certificates | Due from 5 to 10 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 28,114 | $ 45,835
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 1,321 | 2,767
Fair Value | $ 26,793 | $ 43,068
Weighted Average Yield | 1.91% | 2.00%
FNMA and FHLMC certificates | Due after 10 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 1,774,062 | $ 1,411,327
Gross Unrealized Gains | 23,652 | 8,989
Gross Unrealized Losses | 38,846 | 54,100
Fair Value | $ 1,758,868 | $ 1,366,216
Weighted Average Yield | 4.42% | 4.11%
GNMA certificates | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 443,285 | $ 406,275
Gross Unrealized Gains | 9,234 | 4,435
Gross Unrealized Losses | 29,616 | 34,416
Fair Value | $ 422,903 | $ 376,294
Weighted Average Yield | 3.54% | 3.30%
GNMA certificates | Due less than 1 year | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost |  | $ 5
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 0
Fair Value |  | $ 5
Weighted Average Yield |  | 1.31%
GNMA certificates | Due from 1 to 5 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 7,131 | $ 8,851
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 195 | 351
Fair Value | $ 6,936 | $ 8,500
Weighted Average Yield | 1.73% | 1.71%
GNMA certificates | Due from 5 to 10 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 12,344 | $ 17,113
Gross Unrealized Gains | 14 | 16
Gross Unrealized Losses | 515 | 955
Fair Value | $ 11,843 | $ 16,174
Weighted Average Yield | 2.25% | 2.19%
GNMA certificates | Due after 10 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 423,810 | $ 380,306
Gross Unrealized Gains | 9,220 | 4,419
Gross Unrealized Losses | 28,906 | 33,110
Fair Value | $ 404,124 | $ 351,615
Weighted Average Yield | 3.61% | 3.38%
CMOs issued by US government-sponsored agencies | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 6,670 | $ 9,986
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 156 | 376
Fair Value | $ 6,514 | $ 9,610
Weighted Average Yield | 2.16% | 2.06%
CMOs issued by US government-sponsored agencies | Due from 1 to 5 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 5,901 | $ 9,071
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 151 | 364
Fair Value | $ 5,750 | $ 8,707
Weighted Average Yield | 1.78% | 1.78%
CMOs issued by US government-sponsored agencies | Due from 5 to 10 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost |  | $ 54
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 0
Fair Value |  | $ 54
Weighted Average Yield |  | 2.14%
CMOs issued by US government-sponsored agencies | Due after 10 years | Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 769 | $ 861
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 5 | 12
Fair Value | $ 764 | $ 849
Weighted Average Yield | 5.06% | 5.07%
US Treasury securities | Due less than 1 year | Investment securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 1,135 | $ 296,747
Gross Unrealized Gains | 1 | 52
Gross Unrealized Losses | 0 | 0
Fair Value | $ 1,136 | $ 296,799
Weighted Average Yield | 4.88% | 5.40%
Other debt securities | Investment securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 568 | $ 619
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 1 | 3
Fair Value | $ 567 | $ 616
Weighted Average Yield | 3.22% | 3.20%
Other debt securities | Due less than 1 year | Investment securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 500 | $ 500
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | $ 500 | $ 500
Weighted Average Yield | 3.25% | 3.25%
Other debt securities | Due from 1 to 5 years | Investment securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 68 | $ 119
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 1 | 3
Fair Value | $ 67 | $ 116
Weighted Average Yield | 2.97% | 2.97%

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