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SECURITIES - Amortized cost and Fair values of securities with maturities (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Amortized Cost |  |
Amortized Cost | $ 791,533 | $ 584,507
Fair Value |  |
Fair Value | 814,798 | 592,404
Amortized Cost |  |
Securities held-to-maturity | 74,510 | 88,477
Fair Value |  |
Fair Value | 78,891 | 90,529
Mortgage-backed: Agency residential |  |
Amortized Cost |  |
Amortized Cost | 220,970 | 198,184
Fair Value |  |
Fair Value | 226,317 | 200,678
Amortized Cost |  |
Securities held-to-maturity | 14,556 | 19,072
Fair Value |  |
Fair Value | 15,079 | 19,063
Mortgage-backed: Agency commercial |  |
Amortized Cost |  |
Amortized Cost | 166,444 | 133,730
Fair Value |  |
Fair Value | 171,072 | 134,954
Amortized Cost |  |
Securities held-to-maturity | 33,124 | 24,166
Fair Value |  |
Fair Value | 35,502 | $ 24,887
Available-for-sale |  |
Amortized Cost |  |
Due in 1 year or less | 36,762 |
Due after 1 year through 5 years | 85,100 |
Due after 5 years through 10 years | 183,944 |
Due after 10 years | 98,313 |
Amortized Cost | 791,533 |
Fair Value |  |
Due in 1 year or less | 37,033 |
Due after 1 year through 5 years | 87,897 |
Due after 5 years through 10 years | 191,538 |
Due after 10 years | 100,941 |
Fair Value | 814,798 |
Available-for-sale | Mortgage-backed: Agency residential |  |
Amortized Cost |  |
Amortized Cost | 220,970 |
Fair Value |  |
Fair Value | 226,317 |
Available-for-sale | Mortgage-backed: Agency commercial |  |
Amortized Cost |  |
Amortized Cost | 166,444 |
Fair Value |  |
Fair Value | 171,072 |
Held-to-maturity |  |
Amortized Cost |  |
Due in 1 year or less | 747 |
Due after 1 year through 5 years | 14,702 |
Due after 5 years through 10 years | 10,490 |
Due after 10 years | 891 |
Securities held-to-maturity | 74,510 |
Fair Value |  |
Due in 1 year or less | 749 |
Due after 1 year through 5 years | 15,452 |
Due after 5 years through 10 years | 11,186 |
Due after 10 years | 923 |
Fair Value | 78,891 |
Held-to-maturity | Mortgage-backed: Agency residential |  |
Amortized Cost |  |
Securities held-to-maturity | 14,556 |
Fair Value |  |
Fair Value | 15,079 |
Held-to-maturity | Mortgage-backed: Agency commercial |  |
Amortized Cost |  |
Securities held-to-maturity | 33,124 |
Fair Value |  |
Fair Value | $ 35,502 |

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