v3.26.1
INVESTMENT SECURITIES (Investment Securities by Contractual Maturity - AFS) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Amortized Cost $ 2,418,103 $ 2,529,325
Gross Unrealized Gains 26,547 44,316
Gross Unrealized Losses 71,532 62,759
Fair Value $ 2,373,118 $ 2,510,882
Weighted Average Yield 4.43% 4.43%
Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 2,415,453 $ 2,527,174
Gross Unrealized Gains 26,547 44,315
Gross Unrealized Losses 71,532 62,759
Fair Value $ 2,370,468 $ 2,508,730
Weighted Average Yield 4.43% 4.43%
US Treasury securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 2,650 $ 2,151
Gross Unrealized Gains 0 1
Gross Unrealized Losses 0 0
Fair Value $ 2,650 $ 2,152
Weighted Average Yield 3.30% 3.70%
GNMA certificates | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 537,096 $ 508,884
Gross Unrealized Gains 10,184 12,439
Gross Unrealized Losses 31,979 30,752
Fair Value $ 515,301 $ 490,571
Weighted Average Yield 3.88% 3.81%
US Treasury securities | US Treasury securities    
Schedule of Investments [Line Items]    
Amortized Cost   $ 501
Gross Unrealized Gains   0
Gross Unrealized Losses   0
Fair Value   $ 501
Weighted Average Yield   2.35%
Due less than 1 year | US Treasury securities | US Treasury securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 2,150 $ 1,650
Gross Unrealized Gains 0 1
Gross Unrealized Losses 0 0
Fair Value $ 2,150 $ 1,651
Weighted Average Yield 3.52% 4.11%
Due from 1 to 5 years | Other debt securities | US Treasury 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 2.35% 2.35%
Due from 5 to 10 years | GNMA certificates | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 1,331 $ 2,451
Gross Unrealized Gains 0 0
Gross Unrealized Losses 25 41
Fair Value $ 1,306 $ 2,410
Weighted Average Yield 1.83% 1.79%
Due after 10 years | FNMA and FHLMC certificates | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 1,876,800 $ 2,015,685
Gross Unrealized Gains 16,363 31,876
Gross Unrealized Losses 39,542 31,981
Fair Value $ 1,853,621 $ 2,015,580
Weighted Average Yield 4.59% 4.59%
Due after 10 years | GNMA certificates | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 535,765 $ 506,433
Gross Unrealized Gains 10,184 12,439
Gross Unrealized Losses 31,954 30,711
Fair Value $ 513,995 $ 488,161
Weighted Average Yield 3.88% 3.82%
Due after 10 years | CMOs issued by US government-sponsored enterprises | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 1,557 $ 2,605
Gross Unrealized Gains 0 0
Gross Unrealized Losses 11 26
Fair Value $ 1,546 $ 2,579
Weighted Average Yield 3.16% 2.64%
Due after 10 years | Other debt securities | US Treasury securities    
Schedule of Investments [Line Items]    
Amortized Cost   $ 1
Gross Unrealized Gains   0
Gross Unrealized Losses   0
Fair Value   $ 1
Weighted Average Yield   2.97%