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NOTE 2 - INVESTMENT SECURITIES - Amortized Cost and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Securities held to maturity: |  |
Securities held to maturity, at amortized cost | $ 431,283 | $ 400,646
Securities held to maturity, gross unrealized gains | 21,886 | 26,042
Securities held to maturity, gross unrealized (losses) | (2,768) | (143)
Securities held to maturity, fair value | 450,401 | 426,545
Securities available for sale: |  |
Debt Securities, Available-for-sale, Amortized Cost | 247,074 | 206,962
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 8,907 | 4,068
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (2,693) | (335)
Debt Securities, Available-for-sale | 253,288 | 210,695
Municipal securities |  |
Securities held to maturity: |  |
Securities held to maturity, at amortized cost | 430,233 | 399,596
Securities held to maturity, gross unrealized gains | 21,886 | 26,042
Securities held to maturity, gross unrealized (losses) | (2,768) | (143)
Securities held to maturity, fair value | 449,351 | 425,495
Securities available for sale: |  |
Debt Securities, Available-for-sale, Amortized Cost | 61,432 | 46,659
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 2,004 | 1,602
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (5) | (4)
Debt Securities, Available-for-sale | 63,431 | 48,257
U.S. govt. sponsored agency securities |  |
Securities available for sale: |  |
Debt Securities, Available-for-sale, Amortized Cost | 18,998 | 19,872
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 502 | 283
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (43) | (77)
Debt Securities, Available-for-sale | 19,457 | 20,078
Residential mortgage-backed and related securities |  |
Securities available for sale: |  |
Debt Securities, Available-for-sale, Amortized Cost | 116,768 | 118,724
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 6,149 | 2,045
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (64) | (182)
Debt Securities, Available-for-sale | 122,853 | 120,587
Asset-backed securities |  |
Securities available for sale: |  |
Debt Securities, Available-for-sale, Amortized Cost | 31,076 | 16,958
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (2,577) | (71)
Debt Securities, Available-for-sale | 28,499 | 16,887
Other Securities |  |
Securities held to maturity: |  |
Securities held to maturity, at amortized cost | 1,050 | 1,050
Securities held to maturity, fair value | 1,050 | 1,050
Securities available for sale: |  |
Debt Securities, Available-for-sale, Amortized Cost | 18,800 | 4,749
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 252 | 138
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (4) | (1)
Debt Securities, Available-for-sale | $ 19,048 | $ 4,886

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