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Investment Securities (Tables) | 12 Months Ended
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Dec. 31, 2018
Investment Securities |
Schedule of summary of investment securities |
|  | At December 31, 2018
|  |  |  |  | Gross |  | Gross |  |  |
|  | Amortized |  | Unrealized |  | Unrealized |  | Fair
(dollars in thousands) |  | Cost |  | Gains |  | Losses |  | Value
Collaterized mortgage obligations |  | $ | 20,463 |  | $ | 6 |  | $ | (663) |  | $ | 19,806
Agency mortgage-backed securities |  |  | 25,895 |  |  | 6 |  |  | (914) |  |  | 24,987
Municipal securities |  |  | 34,205 |  |  | 78 |  |  | (453) |  |  | 33,830
U.S. Government agency securities |  |  | 1,999 |  |  | — |  |  | (40) |  |  | 1,959
U.S. Treasury securities |  |  | 1,001 |  |  | — |  |  | (11) |  |  | 990
Total securities available for sale |  | $ | 83,563 |  | $ | 90 |  | $ | (2,081) |  | $ | 81,572
|  | At December 31, 2017
|  |  |  |  | Gross |  | Gross |  |  |
|  | Amortized |  | Unrealized |  | Unrealized |  | Fair
(dollars in thousands) |  | Cost |  | Gains |  | Losses |  | Value
Collaterized mortgage obligations |  | $ | 24,063 |  | $ | 20 |  | $ | (569) |  | $ | 23,514
Agency mortgage-backed securities |  |  | 25,725 |  |  | 4 |  |  | (500) |  |  | 25,229
Municipal securities |  |  | 35,453 |  |  | 339 |  |  | (159) |  |  | 35,633
U.S. Government agency securities |  |  | 3,526 |  |  | — |  |  | (46) |  |  | 3,480
U.S. Treasury securities |  |  | 1,501 |  |  | — |  |  | (8) |  |  | 1,493
Total securities available for sale |  | $ | 90,268 |  | $ | 363 |  | $ | (1,282) |  | $ | 89,349
Schedule of gross unrealized losses and fair value, aggregated by investment category and length of time in continuous unrealized loss position | The following tables show the fair value and gross unrealized losses associated with the investment portfolio, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2018 and 2017:
|  | December 31, 2018
|  | Less than 12 months |  | 12 months or more |  | Total
|  | Fair |  | Unrealized |  | Fair |  | Unrealized |  | Fair |  | Unrealized
(dollars in thousands) |  | Value |  | Loss |  | Value |  | Loss |  | Value |  | Loss
Collaterized mortgage obligations |  | $ | 1,625 |  | $ | (22) |  | $ | 17,546 |  | $ | (640) |  | $ | 19,171 |  | $ | (662)
Agency mortgage-backed securities |  |  | 3,399 |  |  | (74) |  |  | 21,417 |  |  | (840) |  |  | 24,816 |  |  | (914)
Municipal securities |  |  | 13,162 |  |  | (244) |  |  | 8,415 |  |  | (210) |  |  | 21,577 |  |  | (454)
U.S. Government agency securities |  |  | — |  |  | — |  |  | 1,959 |  |  | (40) |  |  | 1,959 |  |  | (40)
U.S. Treasury securities |  |  | — |  |  | — |  |  | 990 |  |  | (11) |  |  | 990 |  |  | (11)
|  | $ | 18,186 |  | $ | (340) |  | $ | 50,327 |  | $ | (1,741) |  | $ | 68,513 |  | $ | (2,081)
|  | At December 31, 2017
|  | Less than 12 months |  | 12 months or more |  | Total
|  | Fair |  | Unrealized |  | Fair |  | Unrealized |  | Fair |  | Unrealized
(dollars in thousands) |  | Value |  | Loss |  | Value |  | Loss |  | Value |  | Loss
Collaterized mortgage obligations |  | $ | 6,531 |  | $ | (63) |  | $ | 15,678 |  | $ | (507) |  | $ | 22,209 |  | $ | (570)
Agency mortgage-backed securities |  |  | 6,802 |  |  | (80) |  |  | 18,218 |  |  | (420) |  |  | 25,020 |  |  | (500)
Municipal securities |  |  | 2,396 |  |  | (11) |  |  | 6,230 |  |  | (148) |  |  | 8,626 |  |  | (159)
U.S. Government agency securities |  |  | 2,965 |  |  | (37) |  |  | 515 |  |  | (9) |  |  | 3,480 |  |  | (46)
U.S. Treasury securities |  |  | 1,494 |  |  | (7) |  |  | — |  |  | — |  |  | 1,494 |  |  | (7)
|  | $ | 20,188 |  | $ | (198) |  | $ | 40,641 |  | $ | (1,084) |  | $ | 60,829 |  | $ | (1,282)
Schedule of contractual maturities of investment securities |
|  | At December 31, 2018
|  | Amortized |  | Fair
(dollars in thousands) |  | Cost |  | Value
Due within one year |  | $ | 932 |  | $ | 927
Due over one to five years |  |  | 1,310 |  |  | 1,297
Due over five to ten years |  |  | 7,192 |  |  | 7,136
Due over ten years |  |  | 27,771 |  |  | 27,419
Collaterized mortgage obligations |  |  | 20,463 |  |  | 19,806
Agency mortgage-backed securities |  |  | 25,895 |  |  | 24,987
Total securities available for sale |  | $ | 83,563 |  | $ | 81,572

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