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Investment Securities (Tables) | 9 Months Ended
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Sep. 30, 2020
Investment Securities |
Schedule of amortized cost of investment securities to estimated fair values |
|  | September 30, 2020
|  | Amortized |  | Unrealized |  | Unrealized |  | Fair
(dollars in thousands) |  | Cost |  | Gains |  | Losses |  | Value
U.S. Treasury and agencies |  | $ | 16,075 |  | $ | 34 |  | $ | (17) |  | $ | 16,092
Obligations of state and political agencies |  |  | 142,308 |  |  | 4,908 |  |  | — |  |  | 147,216
Mortgage backed securities |  |  |  |  |  |  |  |  |  |  |  |
Residential agency |  |  | 203,812 |  |  | 7,933 |  |  | (45) |  |  | 211,700
Commercial |  |  | 86,502 |  |  | 1,092 |  |  | (52) |  |  | 87,542
Asset backed securities |  |  | 123 |  |  | 8 |  |  | — |  |  | 131
Corporate bonds |  |  | 32,518 |  |  | 244 |  |  | (29) |  |  | 32,733
Total available-for-sale investment securities |  | $ | 481,338 |  | $ | 14,219 |  | $ | (143) |  | $ | 495,414
|  | December 31, 2019
|  | Amortized |  | Unrealized |  | Unrealized |  | Fair
(dollars in thousands) |  | Cost |  | Gains |  | Losses |  | Value
U.S. Treasury and agencies |  | $ | 21,246 |  | $ | 9 |  | $ | (15) |  | $ | 21,240
Obligations of state and political agencies |  |  | 68,162 |  |  | 647 |  |  | (161) |  |  | 68,648
Mortgage backed securities |  |  |  |  |  |  |  |  |  |  |  |
Residential agency |  |  | 180,411 |  |  | 2,258 |  |  | (131) |  |  | 182,538
Commercial |  |  | 30,752 |  |  | 101 |  |  | (168) |  |  | 30,685
Asset backed securities |  |  | 139 |  |  | 5 |  |  | — |  |  | 144
Corporate bonds |  |  | 7,054 |  |  | 41 |  |  | — |  |  | 7,095
Total available-for-sale investment securities |  | $ | 307,764 |  | $ | 3,061 |  | $ | (475) |  | $ | 310,350
Schedule of investment securities with gross unrealized losses |
|  | September 30, 2020
|  | Less than 12 Months |  | Over 12 Months |  | Total
|  | Unrealized |  | Fair |  | Unrealized |  | Fair |  | Unrealized |  | Fair
(dollars in thousands) |  | Losses |  | Value |  | Losses |  | Value |  | Losses |  | Value
U.S. Treasury and agencies |  | $ | (9) |  | $ | 4,694 |  | $ | (8) |  | $ | 1,309 |  | $ | (17) |  | $ | 6,003
Obligations of state and political agencies |  |  | — |  |  | 590 |  |  | — |  |  | — |  |  | — |  |  | 590
Mortgage backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential agency |  |  | (45) |  |  | 15,481 |  |  | — |  |  | — |  |  | (45) |  |  | 15,481
Commercial |  |  | (48) |  |  | 25,292 |  |  | (4) |  |  | 2,603 |  |  | (52) |  |  | 27,895
Asset backed securities |  |  | — |  |  | — |  |  | — |  |  | 2 |  |  | — |  |  | 2
Corporate bonds |  |  | (29) |  |  | 5,971 |  |  | — |  |  | — |  |  | (29) |  |  | 5,971
Total available-for-sale investment securities |  | $ | (131) |  | $ | 52,028 |  | $ | (12) |  | $ | 3,914 |  | $ | (143) |  | $ | 55,942
|  | December 31, 2019
|  | Less than 12 Months |  | Over 12 Months |  | Total
|  | Unrealized |  | Fair |  | Unrealized |  | Fair |  | Unrealized |  | Fair
(dollars in thousands) |  | Losses |  | Value |  | Losses |  | Value |  | Losses |  | Value
U.S. Treasury and agencies |  | $ | (5) |  | $ | 1,740 |  | $ | (10) |  | $ | 9,990 |  | $ | (15) |  | $ | 11,730
Obligations of state and political agencies |  |  | (140) |  |  | 11,959 |  |  | (21) |  |  | 5,798 |  |  | (161) |  |  | 17,757
Mortgage backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential agency |  |  | (52) |  |  | 17,131 |  |  | (79) |  |  | 14,036 |  |  | (131) |  |  | 31,167
Commercial |  |  | (116) |  |  | 15,235 |  |  | (52) |  |  | 6,195 |  |  | (168) |  |  | 21,430
Asset backed securities |  |  | — |  |  | 2 |  |  | — |  |  | — |  |  | — |  |  | 2
Corporate bonds |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | —
Total available-for-sale investment securities |  | $ | (313) |  | $ | 46,067 |  | $ | (162) |  | $ | 36,019 |  | $ | (475) |  | $ | 82,086
Schedule of contractual maturity of amortized cost and estimated fair value |
|  | Amortized |  | Fair
(dollars in thousands) |  | Cost |  | Value
Due within one year or less |  | $ | 16,132 |  | $ | 16,211
Due after one year through five years |  |  | 26,821 |  |  | 27,459
Due after five years through ten years |  |  | 145,310 |  |  | 150,121
Due after 10 years |  |  | 293,075 |  |  | 301,623
Total available-for-sale investment securities |  | $ | 481,338 |  | $ | 495,414
Schedule of proceeds from the sale of available for sale securities |
|  | Three months ended |  | Nine months ended
|  | September 30, |  | September 30,
(dollars in thousands) |  | 2020 |  | 2019 |  | 2020 |  | 2019
Proceeds |  | $ | 35,125 |  | $ | 10,934 |  | $ | 74,630 |  | $ | 32,565
Realized gains |  |  | 1,428 |  |  | 59 |  |  | 2,722 |  |  | 357
Realized losses |  |  | — |  |  | (11) |  |  | — |  |  | (22)
Schedule of federal home loan bank |
|  | September 30, |  | December 31,
(dollars in thousands) |  | 2020 |  | 2019
Federal Reserve |  | $ | 2,675 |  | $ | 2,675
FHLB |  |  | 3,169 |  |  | 3,080

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