v3.26.1
INVESTMENT SECURITIES (Investment Securities by Contractual Maturity - AFS) (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Amortized Cost $ 2,498,737 $ 2,529,325
Gross Unrealized Gains 28,827 44,316
Gross Unrealized Losses 67,392 62,759
Fair Value $ 2,460,172 $ 2,510,882
Weighted Average Yield 4.44% 4.43%
Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 2,496,106 $ 2,527,174
Gross Unrealized Gains 28,827 44,315
Gross Unrealized Losses 67,392 62,759
Fair Value $ 2,457,541 $ 2,508,730
Weighted Average Yield 4.44% 4.43%
US Treasury securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 2,631 $ 2,151
Gross Unrealized Gains 0 1
Gross Unrealized Losses 0 0
Fair Value $ 2,631 $ 2,152
Weighted Average Yield 3.31% 3.70%
FNMA and FHLMC certificates | Due after 10 years | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 1,970,185 $ 2,015,685
Gross Unrealized Gains 18,393 31,876
Gross Unrealized Losses 36,227 31,981
Fair Value $ 1,952,351 $ 2,015,580
Weighted Average Yield 4.60% 4.59%
GNMA certificates | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 523,872 $ 508,884
Gross Unrealized Gains 10,434 12,439
Gross Unrealized Losses 31,147 30,752
Fair Value $ 503,159 $ 490,571
Weighted Average Yield 3.85% 3.81%
GNMA certificates | Due from 5 to 10 years | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 1,817 $ 2,451
Gross Unrealized Gains 0 0
Gross Unrealized Losses 31 41
Fair Value $ 1,786 $ 2,410
Weighted Average Yield 1.81% 1.79%
GNMA certificates | Due after 10 years | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 522,055 $ 506,433
Gross Unrealized Gains 10,434 12,439
Gross Unrealized Losses 31,116 30,711
Fair Value $ 501,373 $ 488,161
Weighted Average Yield 3.85% 3.82%
CMOs issued by US government-sponsored agencies | Due after 10 years | Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 2,049 $ 2,605
Gross Unrealized Gains 0 0
Gross Unrealized Losses 18 26
Fair Value $ 2,031 $ 2,579
Weighted Average Yield 2.86% 2.64%
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%
US Treasury securities | Due less than 1 year | US Treasury securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 2,131 $ 1,650
Gross Unrealized Gains 0 1
Gross Unrealized Losses 0 0
Fair Value $ 2,131 $ 1,651
Weighted Average Yield 3.53% 4.11%
Other debt securities | Due from 1 to 5 years | 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%
Other debt securities | Due after 10 years | 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%