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SECURITIES - Amortized cost and Fair values of securities with maturities (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Amortized Cost |  |
Amortized Cost | $ 821,935 | $ 899,700
Fair Value |  |
Fair Value | 836,267 | 922,869
Amortized Cost |  |
Debt securities held-to-maturity | 309,132 | 68,395
Fair Value |  |
Fair Value | 314,924 | 72,441
Mortgage-backed: Agency residential |  |
Amortized Cost |  |
Amortized Cost | 143,657 | 198,543
Fair Value |  |
Fair Value | 147,147 | 203,252
Amortized Cost |  |
Debt securities held-to-maturity | 24,063 | 13,031
Fair Value |  |
Fair Value | 24,567 | 13,483
Mortgage-backed: Agency commercial |  |
Amortized Cost |  |
Amortized Cost | 131,172 | 246,649
Fair Value |  |
Fair Value | 133,440 | 250,766
Amortized Cost |  |
Debt securities held-to-maturity | 258,563 | 32,880
Fair Value |  |
Fair Value | 262,582 | $ 35,084
Available-for-sale |  |
Amortized Cost |  |
Due in 1 year or less | 30,667 |
Due after 1 year through 5 years | 86,096 |
Due after 5 years through 10 years | 303,175 |
Due after 10 years | 127,168 |
Amortized Cost | 821,935 |
Fair Value |  |
Due in 1 year or less | 30,905 |
Due after 1 year through 5 years | 89,035 |
Due after 5 years through 10 years | 307,785 |
Due after 10 years | 127,955 |
Fair Value | 836,267 |
Available-for-sale | Mortgage-backed: Agency residential |  |
Amortized Cost |  |
Amortized Cost | 143,657 |
Fair Value |  |
Fair Value | 147,147 |
Available-for-sale | Mortgage-backed: Agency commercial |  |
Amortized Cost |  |
Amortized Cost | 131,172 |
Fair Value |  |
Fair Value | 133,440 |
Held-to-maturity |  |
Amortized Cost |  |
Due in 1 year or less | 3,049 |
Due after 1 year through 5 years | 12,129 |
Due after 5 years through 10 years | 10,937 |
Due after 10 years | 391 |
Debt securities held-to-maturity | 309,132 |
Fair Value |  |
Due in 1 year or less | 3,082 |
Due after 1 year through 5 years | 12,901 |
Due after 5 years through 10 years | 11,384 |
Due after 10 years | 408 |
Fair Value | 314,924 |
Held-to-maturity | Mortgage-backed: Agency residential |  |
Amortized Cost |  |
Debt securities held-to-maturity | 24,063 |
Fair Value |  |
Fair Value | 24,567 |
Held-to-maturity | Mortgage-backed: Agency commercial |  |
Amortized Cost |  |
Debt securities held-to-maturity | 258,563 |
Fair Value |  |
Fair Value | $ 262,582 |

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