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INVESTMENT SECURITIES (Investment Securities by Contractual Maturity - AFS) (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Schedule of Investments [Line Items]    
Amortized Cost $ 2,444,135 $ 2,177,761
Gross Unrealized Gains 9,614 13,476
Gross Unrealized Losses 115,544 91,973
Fair Value $ 2,338,205 $ 2,099,264
Weighted Average Yield 4.29% 4.07%
Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 2,442,436 $ 1,880,395
Gross Unrealized Gains 9,613 13,424
Gross Unrealized Losses 115,544 91,970
Fair Value $ 2,336,505 $ 1,801,849
Weighted Average Yield 4.29% 3.86%
Investment securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 1,699 $ 297,366
Gross Unrealized Gains 1 52
Gross Unrealized Losses 0 3
Fair Value $ 1,700 $ 297,415
Weighted Average Yield 4.06% 5.39%
FNMA and FHLMC certificates | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 1,981,787 $ 1,464,134
Gross Unrealized Gains 5,545 8,989
Gross Unrealized Losses 74,451 57,178
Fair Value $ 1,912,881 $ 1,415,945
Weighted Average Yield 4.46% 4.03%
FNMA and FHLMC certificates | Due from 1 to 5 years | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 14,930 $ 6,972
Gross Unrealized Gains 0 0
Gross Unrealized Losses 587 311
Fair Value $ 14,343 $ 6,661
Weighted Average Yield 2.07% 1.76%
FNMA and FHLMC certificates | Due from 5 to 10 years | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 23,664 $ 45,835
Gross Unrealized Gains 0 0
Gross Unrealized Losses 1,415 2,767
Fair Value $ 22,249 $ 43,068
Weighted Average Yield 1.90% 2.00%
FNMA and FHLMC certificates | Due after 10 years | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 1,943,193 $ 1,411,327
Gross Unrealized Gains 5,545 8,989
Gross Unrealized Losses 72,449 54,100
Fair Value $ 1,876,289 $ 1,366,216
Weighted Average Yield 4.51% 4.11%
GNMA certificates | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 454,881 $ 406,275
Gross Unrealized Gains 4,068 4,435
Gross Unrealized Losses 40,964 34,416
Fair Value $ 417,985 $ 376,294
Weighted Average Yield 3.57% 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 $ 6,215 $ 8,851
Gross Unrealized Gains 0 0
Gross Unrealized Losses 177 351
Fair Value $ 6,038 $ 8,500
Weighted Average Yield 1.74% 1.71%
GNMA certificates | Due from 5 to 10 years | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 11,358 $ 17,113
Gross Unrealized Gains 10 16
Gross Unrealized Losses 641 955
Fair Value $ 10,727 $ 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 $ 437,308 $ 380,306
Gross Unrealized Gains 4,058 4,419
Gross Unrealized Losses 40,146 33,110
Fair Value $ 401,220 $ 351,615
Weighted Average Yield 3.63% 3.38%
CMOs issued by US government-sponsored agencies | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 5,768 $ 9,986
Gross Unrealized Gains 0 0
Gross Unrealized Losses 129 376
Fair Value $ 5,639 $ 9,610
Weighted Average Yield 2.21% 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 $ 5,015 $ 9,071
Gross Unrealized Gains 0 0
Gross Unrealized Losses 126 364
Fair Value $ 4,889 $ 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 $ 753 $ 861
Gross Unrealized Gains 0 0
Gross Unrealized Losses 3 12
Fair Value $ 750 $ 849
Weighted Average Yield 5.07% 5.07%
US Treasury securities | Due less than 1 year | Investment securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 1,149 $ 296,747
Gross Unrealized Gains 1 52
Gross Unrealized Losses 0 0
Fair Value $ 1,150 $ 296,799
Weighted Average Yield 4.85% 5.40%
Other debt securities | Investment securities    
Schedule of Investments [Line Items]    
Amortized Cost   $ 619
Gross Unrealized Gains   0
Gross Unrealized Losses   3
Fair Value   $ 616
Weighted Average Yield   3.20%
Other debt securities | Due less than 1 year | Investment securities    
Schedule of Investments [Line Items]    
Amortized Cost   $ 500
Gross Unrealized Gains   0
Gross Unrealized Losses   0
Fair Value   $ 500
Weighted Average Yield   3.25%
Other debt securities | Due from 1 to 5 years | Investment securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 550 $ 119
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 3
Fair Value $ 550 $ 116
Weighted Average Yield 2.41% 2.97%