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INVESTMENT SECURITIES (Investment Securities by Contractual Maturity - AFS) (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 2,198,116 | $ 2,177,761
Gross Unrealized Gains | 10,287 | 13,476
Gross Unrealized Losses | 112,097 | 91,973
Fair Value | $ 2,096,306 | $ 2,099,264
Weighted Average Yield | 4.17% | 4.07%
Mortgage-backed securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 1,996,877 | $ 1,880,395
Gross Unrealized Gains | 10,285 | 13,424
Gross Unrealized Losses | 112,095 | 91,970
Fair Value | $ 1,895,067 | $ 1,801,849
Weighted Average Yield | 4.04% | 3.86%
Mortgage-backed securities | FNMA and FHLMC certificates |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 1,557,846 | $ 1,464,134
Gross Unrealized Gains | 5,261 | 8,989
Gross Unrealized Losses | 71,946 | 57,178
Fair Value | $ 1,491,161 | $ 1,415,945
Weighted Average Yield | 4.21% | 4.03%
Mortgage-backed securities | GNMA certificates |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 431,345 | $ 406,275
Gross Unrealized Gains | 5,024 | 4,435
Gross Unrealized Losses | 39,864 | 34,416
Fair Value | $ 396,505 | $ 376,294
Weighted Average Yield | 3.47% | 3.30%
Mortgage-backed securities | CMOs issued by US government-sponsored agencies |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 7,686 | $ 9,986
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 285 | 376
Fair Value | $ 7,401 | $ 9,610
Weighted Average Yield | 2.11% | 2.06%
Mortgage-backed securities | Due less than 1 year | GNMA certificates |  |
Schedule of Investments [Line Items] |  |
Amortized Cost |  | $ 5
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 0
Fair Value |  | $ 5
Weighted Average Yield |  | 1.31%
Mortgage-backed securities | Due from 1 to 5 years | FNMA and FHLMC certificates |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 8,933 | $ 6,972
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 421 | 311
Fair Value | $ 8,512 | $ 6,661
Weighted Average Yield | 1.98% | 1.76%
Mortgage-backed securities | Due from 1 to 5 years | GNMA certificates |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 7,965 | $ 8,851
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 319 | 351
Fair Value | $ 7,646 | $ 8,500
Weighted Average Yield | 1.72% | 1.71%
Mortgage-backed securities | Due from 1 to 5 years | CMOs issued by US government-sponsored agencies |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 6,896 | $ 9,071
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 274 | 364
Fair Value | $ 6,622 | $ 8,707
Weighted Average Yield | 1.78% | 1.78%
Mortgage-backed securities | Due from 5 to 10 years | FNMA and FHLMC certificates |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 36,742 | $ 45,835
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 2,517 | 2,767
Fair Value | $ 34,225 | $ 43,068
Weighted Average Yield | 1.97% | 2.00%
Mortgage-backed securities | Due from 5 to 10 years | GNMA certificates |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 13,552 | $ 17,113
Gross Unrealized Gains | 7 | 16
Gross Unrealized Losses | 883 | 955
Fair Value | $ 12,676 | $ 16,174
Weighted Average Yield | 2.23% | 2.19%
Mortgage-backed securities | Due from 5 to 10 years | CMOs issued by US government-sponsored agencies |  |
Schedule of Investments [Line Items] |  |
Amortized Cost |  | $ 54
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 0
Fair Value |  | $ 54
Weighted Average Yield |  | 2.14%
Mortgage-backed securities | Due after 10 years | FNMA and FHLMC certificates |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 1,512,171 | $ 1,411,327
Gross Unrealized Gains | 5,261 | 8,989
Gross Unrealized Losses | 69,008 | 54,100
Fair Value | $ 1,448,424 | $ 1,366,216
Weighted Average Yield | 4.28% | 4.11%
Mortgage-backed securities | Due after 10 years | GNMA certificates |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 409,828 | $ 380,306
Gross Unrealized Gains | 5,017 | 4,419
Gross Unrealized Losses | 38,662 | 33,110
Fair Value | $ 376,183 | $ 351,615
Weighted Average Yield | 3.54% | 3.38%
Mortgage-backed securities | Due after 10 years | CMOs issued by US government-sponsored agencies |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 790 | $ 861
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 11 | 12
Fair Value | $ 779 | $ 849
Weighted Average Yield | 5.06% | 5.07%
Investment securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 201,239 | $ 297,366
Gross Unrealized Gains | 2 | 52
Gross Unrealized Losses | 2 | 3
Fair Value | $ 201,239 | $ 297,415
Weighted Average Yield | 5.41% | 5.39%
Investment securities | Other debt securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 583 | $ 619
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 2 | 3
Fair Value | $ 581 | $ 616
Weighted Average Yield | 3.21% | 3.20%
Investment securities | Due less than 1 year | US Treasury securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 200,656 | $ 296,747
Gross Unrealized Gains | 2 | 52
Gross Unrealized Losses | 0 | 0
Fair Value | $ 200,658 | $ 296,799
Weighted Average Yield | 5.41% | 5.40%
Investment securities | Due less than 1 year | Other debt 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%
Investment securities | Due from 1 to 5 years | Other debt securities |  |
Schedule of Investments [Line Items] |  |
Amortized Cost | $ 83 | $ 119
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 2 | 3
Fair Value | $ 81 | $ 116
Weighted Average Yield | 2.97% | 2.97%

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