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SECURITIES (Tables) | 12 Months Ended
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Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract] |
Summary of Available-For-Sale Securities | Information related to the fair value and amortized cost of securities available for sale and the related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) at December 31 is provided in the tables below.
|  |  | Gross |  | Gross |  |
| Amortized |  | Unrealized |  | Unrealized |  | Fair
(dollars in thousands) | Cost |  | Gain |  | Losses |  | Value
2018 |  |  |  |  |  |  |
U.S. Treasury securities | $994 |  | $0 |  | $(7) |  | $987
U.S. government sponsored agencies | 4,435 |  | 0 |  | (85) |  | 4,350
Mortgage-backed securities: residential | 329,516 |  | 1,392 |  | (5,496) |  | 325,412
Mortgage-backed securities: commercial | 38,712 |  | 0 |  | (571) |  | 38,141
State and municipal securities | 217,964 |  | 1,403 |  | (2,708) |  | 216,659
Total | $591,621 |  | $2,795 |  | $(8,867) |  | $585,549
2017 |  |  |  |  |  |  |
U.S. Treasury securities | $992 |  | $5 |  | $0 |  | $997
U.S. government sponsored agencies | 5,191 |  | 0 |  | (69) |  | 5,122
Mortgage-backed securities: residential | 314,650 |  | 2,099 |  | (2,975) |  | 313,774
Mortgage-backed securities: commercial | 44,208 |  | 75 |  | (72) |  | 44,211
State and municipal securities | 172,375 |  | 2,990 |  | (976) |  | 174,389
Total | $537,416 |  | $5,169 |  | $(4,092) |  | $538,493
Schedule of Available-For-Sale Securities By Maturity | Actual maturities of securities may differ from contractual maturities because borrowers may have the right to prepay the obligation without prepayment penalty.
| Amortized |  | Fair
(dollars in thousands) | Cost |  | Value
Due in one year or less | $2,540 |  | $2,541
Due after one year through five years | 22,363 |  | 22,522
Due after five years through ten years | 32,702 |  | 32,656
Due after ten years | 165,788 |  | 164,277
| 223,393 |  | 221,996
Mortgage-backed securities | 368,228 |  | 363,553
Total debt securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | $591,621 |  | $585,549
Schedule of Sales of Securities Available For Sale | Security proceeds, gross gains and gross losses for 2018, 2017 and 2016 were as follows:
(dollars in thousands) | 2018 |  | 2017 |  | 2016 |
Sales of securities available for sale |  |  |  |  |  |
Proceeds | $15,302 |  | $40,877 |  | $12,095 |
Gross gains | 21 |  | 267 |  | 83 |
Gross losses | (71 | ) | (235 | ) | (17 | )
Number of securities | 29 |  | 50 |  | 15 |
Schedule of Available-For-Sale Securities Continuous Unrealized Loss Position | Information regarding securities with unrealized losses as of December 31, 2018 and 2017 is presented below. The tables distribute the securities between those with unrealized losses for less than twelve months and those with unrealized losses for twelve months or more.
| Less than 12 months |  | 12 months or more |  | Total
| Fair |  | Unrealized |  | Fair |  | Unrealized |  | Fair |  | Unrealized
(dollars in thousands) | Value |  | Losses |  | Value |  | Losses |  | Value |  | Losses
2018 |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities | $0 |  | $0 |  | $987 |  | $7 |  | $987 |  | $7
U.S. government sponsored agencies | 0 |  | 0 |  | 4,350 |  | 85 |  | 4,350 |  | 85
Mortgage-backed securities: residential | 11,619 |  | 12 |  | 217,182 |  | 5,484 |  | 228,801 |  | 5,496
Mortgage-backed securities: commercial | 0 |  | 0 |  | 38,141 |  | 571 |  | 38,141 |  | 571
State and municipal securities | 26,229 |  | 124 |  | 85,982 |  | 2,584 |  | 112,211 |  | 2,708
Total temporarily impaired | $37,848 |  | $136 |  | $346,642 |  | $8,731 |  | $384,490 |  | $8,867
2017 |  |  |  |  |  |  |  |  |  |  |
U.S. government sponsored agencies | $2,353 |  | $6 |  | $2,769 |  | $63 |  | $5,122 |  | $69
Mortgage-backed securities: residential | 142,834 |  | 1,412 |  | 59,024 |  | 1,563 |  | 201,858 |  | 2,975
Mortgage-backed securities: commercial | 23,505 |  | 72 |  | 0 |  | 0 |  | 23,505 |  | 72
State and municipal securities | 8,585 |  | 47 |  | 49,552 |  | 929 |  | 58,137 |  | 976
Total temporarily impaired | $177,277 |  | $1,537 |  | $111,345 |  | $2,555 |  | $288,622 |  | $4,092
Quantitative Disclosure of Available-For-Sale Securities | The number of securities with unrealized losses as of December 31, 2018 and 2017 is presented below.
| Less than |  | 12 months |  |
| 12 months |  | or more |  | Total
2018 |  |  |  |  |
U.S. Treasury securities | 0 |  | 1 |  | 1
U.S. government sponsored agencies | 0 |  | 2 |  | 2
Mortgage-backed securities: residential | 5 |  | 84 |  | 89
Mortgage-backed securities: commercial | 0 |  | 9 |  | 9
State and municipal securities | 35 |  | 111 |  | 146
Total temporarily impaired | 40 |  | 207 |  | 247
2017 |  |  |  |  |
U.S. government sponsored agencies | 1 |  | 1 |  | 2
Mortgage-backed securities: residential | 46 |  | 21 |  | 67
Mortgage-backed securities: commercial | 5 |  | 0 |  | 5
State and municipal securities | 17 |  | 62 |  | 79
Total temporarily impaired | 69 |  | 84 |  | 153

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