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INVESTMENT SECURITIES (Investment Securities by Contractual Maturity - AFS) (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Schedule of Investments [Line Items]    
Amortized Cost $ 1,522,812 $ 503,421
Gross Unrealized Gains 995 10,692
Gross Unrealized Losses 111,031 3,400
Fair Value $ 1,412,776 $ 510,713
Weighted Average Yield 2.90% 2.05%
Mortgage-backed securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 1,210,834 $ 489,155
Gross Unrealized Gains 965 10,555
Gross Unrealized Losses 109,298 3,400
Fair Value $ 1,102,501 $ 496,310
Weighted Average Yield 2.79% 2.05%
Mortgage-backed securities | FNMA and FHLMC certificates    
Schedule of Investments [Line Items]    
Amortized Cost $ 837,703 $ 184,000
Gross Unrealized Gains 59 2,502
Gross Unrealized Losses 69,646 3,200
Fair Value $ 768,116 $ 183,302
Weighted Average Yield 2.79% 1.65%
Mortgage-backed securities | GNMA Securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 357,497 $ 281,061
Gross Unrealized Gains 906 7,716
Gross Unrealized Losses 38,869 199
Fair Value $ 319,534 $ 288,578
Weighted Average Yield 2.80% 2.32%
Mortgage-backed securities | CMOs issued by US government-sponsored agencies    
Schedule of Investments [Line Items]    
Amortized Cost $ 15,634 $ 24,094
Gross Unrealized Gains 0 337
Gross Unrealized Losses 783 1
Fair Value $ 14,851 $ 24,430
Weighted Average Yield 1.99% 1.96%
Mortgage-backed securities | Due from 1 to 5 years | FNMA and FHLMC certificates    
Schedule of Investments [Line Items]    
Amortized Cost $ 10,155  
Gross Unrealized Gains 0  
Gross Unrealized Losses 550  
Fair Value $ 9,605  
Weighted Average Yield 1.76%  
Mortgage-backed securities | Due from 1 to 5 years | GNMA Securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 12,505 $ 10,536
Gross Unrealized Gains 0 233
Gross Unrealized Losses 632 1
Fair Value $ 11,873 $ 10,768
Weighted Average Yield 1.66% 1.66%
Mortgage-backed securities | Due from 1 to 5 years | CMOs issued by US government-sponsored agencies    
Schedule of Investments [Line Items]    
Amortized Cost $ 14,190 $ 1,788
Gross Unrealized Gains 0 22
Gross Unrealized Losses 755 0
Fair Value $ 13,435 $ 1,810
Weighted Average Yield 1.78% 1.70%
Mortgage-backed securities | Due from 5 to 10 years | FNMA and FHLMC certificates    
Schedule of Investments [Line Items]    
Amortized Cost $ 59,167 $ 90,560
Gross Unrealized Gains 0 2,502
Gross Unrealized Losses 3,764 0
Fair Value $ 55,403 $ 93,062
Weighted Average Yield 2.00% 1.94%
Mortgage-backed securities | Due from 5 to 10 years | GNMA Securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 24,575 $ 26,419
Gross Unrealized Gains 14 556
Gross Unrealized Losses 1,585 0
Fair Value $ 23,004 $ 26,975
Weighted Average Yield 2.13% 1.80%
Mortgage-backed securities | Due from 5 to 10 years | CMOs issued by US government-sponsored agencies    
Schedule of Investments [Line Items]    
Amortized Cost $ 485 $ 20,705
Gross Unrealized Gains 0 299
Gross Unrealized Losses 10 0
Fair Value $ 475 $ 21,004
Weighted Average Yield 2.14% 1.81%
Mortgage-backed securities | Due after 10 years | FNMA and FHLMC certificates    
Schedule of Investments [Line Items]    
Amortized Cost $ 768,381 $ 93,440
Gross Unrealized Gains 59 0
Gross Unrealized Losses 65,332 3,200
Fair Value $ 703,108 $ 90,240
Weighted Average Yield 2.87% 1.37%
Mortgage-backed securities | Due after 10 years | GNMA Securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 320,417 $ 244,106
Gross Unrealized Gains 892 6,927
Gross Unrealized Losses 36,652 198
Fair Value $ 284,657 $ 250,835
Weighted Average Yield 2.90% 2.40%
Mortgage-backed securities | Due after 10 years | CMOs issued by US government-sponsored agencies    
Schedule of Investments [Line Items]    
Amortized Cost $ 959 $ 1,601
Gross Unrealized Gains 0 16
Gross Unrealized Losses 18 1
Fair Value $ 941 $ 1,616
Weighted Average Yield 5.06% 4.24%
Investment securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 311,978 $ 14,266
Gross Unrealized Gains 30 137
Gross Unrealized Losses 1,733 0
Fair Value $ 310,275 $ 14,403
Weighted Average Yield 3.35% 1.95%
Investment securities | Other debt securities    
Schedule of Investments [Line Items]    
Amortized Cost   $ 2,347
Gross Unrealized Gains   48
Gross Unrealized Losses   0
Fair Value   $ 2,395
Weighted Average Yield   4.39%
Investment securities | Due less than 1 year | US Treasury securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 310,862 $ 10,737
Gross Unrealized Gains 0 88
Gross Unrealized Losses 1,729 0
Fair Value $ 309,133 $ 10,825
Weighted Average Yield 3.34% 1.48%
Investment securities | Due less than 1 year | Obligations of US government-sponsored agencies    
Schedule of Investments [Line Items]    
Amortized Cost   $ 1,182
Gross Unrealized Gains   1
Gross Unrealized Losses   0
Fair Value   $ 1,183
Weighted Average Yield   1.40%
Investment securities | Due less than 1 year | Other debt securities    
Schedule of Investments [Line Items]    
Amortized Cost   $ 500
Gross Unrealized Gains   0
Gross Unrealized Losses   0
Fair Value   $ 500
Weighted Average Yield   0.57%
Investment securities | Due from 1 to 5 years | Other debt securities    
Schedule of Investments [Line Items]    
Amortized Cost $ 1,116 $ 1,847
Gross Unrealized Gains 30 48
Gross Unrealized Losses 4 0
Fair Value $ 1,142 $ 1,895
Weighted Average Yield 4.45% 5.43%