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SECURITIES - Amortized cost and Fair values of securities with maturities (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Amortized Cost |  |
Amortized Cost | $ 851,299 | $ 899,700
Fair Value |  |
Fair Value | 856,835 | 922,869
Amortized Cost |  |
Debt securities held-to-maturity Amortized Cost | 192,994 | 68,395
Fair Value |  |
Fair Value | 195,608 | 72,441
Mortgage-backed: Agency residential |  |
Amortized Cost |  |
Amortized Cost | 164,942 | 198,543
Fair Value |  |
Fair Value | 169,104 | 203,252
Amortized Cost |  |
Debt securities held-to-maturity Amortized Cost | 20,335 | 13,031
Fair Value |  |
Fair Value | 20,723 | 13,483
Mortgage-backed: Agency commercial |  |
Amortized Cost |  |
Amortized Cost | 208,692 | 246,649
Fair Value |  |
Fair Value | 207,997 | 250,766
Amortized Cost |  |
Debt securities held-to-maturity Amortized Cost | 144,269 | 32,880
Fair Value |  |
Fair Value | 145,307 | $ 35,084
Available-for-sale |  |
Amortized Cost |  |
Due in 1 year or less | 31,406 |
Due after 1 year through 5 years | 76,138 |
Due after 5 years through 10 years | 242,096 |
Due after 10 years | 128,025 |
Amortized Cost | 851,299 |
Fair Value |  |
Due in 1 year or less | 31,734 |
Due after 1 year through 5 years | 78,807 |
Due after 5 years through 10 years | 242,487 |
Due after 10 years | 126,706 |
Fair Value | 856,835 |
Available-for-sale | Mortgage-backed: Agency residential |  |
Amortized Cost |  |
Amortized Cost | 164,942 |
Fair Value |  |
Fair Value | 169,104 |
Available-for-sale | Mortgage-backed: Agency commercial |  |
Amortized Cost |  |
Amortized Cost | 208,692 |
Fair Value |  |
Fair Value | 207,997 |
Held-to-maturity |  |
Amortized Cost |  |
Due in 1 year or less | 2,772 |
Due after 1 year through 5 years | 12,000 |
Due after 5 years through 10 years | 13,227 |
Due after 10 years | 391 |
Debt securities held-to-maturity Amortized Cost | 192,994 |
Fair Value |  |
Due in 1 year or less | 2,817 |
Due after 1 year through 5 years | 12,770 |
Due after 5 years through 10 years | 13,580 |
Due after 10 years | 411 |
Fair Value | 195,608 |
Held-to-maturity | Mortgage-backed: Agency residential |  |
Amortized Cost |  |
Debt securities held-to-maturity Amortized Cost | 20,335 |
Fair Value |  |
Fair Value | 20,723 |
Held-to-maturity | Mortgage-backed: Agency commercial |  |
Amortized Cost |  |
Debt securities held-to-maturity Amortized Cost | 144,269 |
Fair Value |  |
Fair Value | $ 145,307 |

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