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SECURITIES AVAILABLE FOR SALE, HELD TO MATURITY, AND EQUITY SECURITIES - Schedule of Amortized Cost and Estimated Fair Value of Available for Sale (AFS) and Held to Maturity (HTM) Securities, Segregated by Contractual Maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Available for sale, Amortized Cost |  |
Within 1 year | $ 7,271 |
Over 1 year to 5 years | 19,220 |
Over 5 years to 10 years | 48,936 |
Over 10 years | 34,871 |
Total bonds and obligations | 110,298 |
Mortgage-backed securities | 671,648 |
Amortized Cost | 781,946 | $ 1,211,212
Available for sale, Fair Value |  |
Within 1 year | 7,281 |
Over 1 year to 5 years | 18,903 |
Over 5 years to 10 years | 45,939 |
Over 10 years | 33,688 |
Total bonds and obligations | 105,811 |
Mortgage-backed securities | 555,929 |
Fair Value | 661,740 | 1,022,285
Held to maturity, Amortized Cost |  |
Within 1 year | 646 |
Over 1 year to 5 years | 1,910 |
Over 5 years to 10 years | 48,372 |
Over 10 years | 187,300 |
Total bonds and obligations | 238,228 |
Mortgage-backed securities | 274,049 |
Amortized Cost | 512,277 | 543,351
Held to maturity, Fair Value |  |
Within 1 year | 646 |
Over 1 year to 5 years | 1,904 |
Over 5 years to 10 years | 48,226 |
Over 10 years | 170,750 |
Total bonds and obligations | 221,526 |
Mortgage-backed securities | 229,668 |
Fair Value | $ 451,194 | $ 476,228

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