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SECURITIES (Tables) | 9 Months Ended
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Sep. 30, 2019
SECURITIES |
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 is provided in the tables below. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
(dollars in thousands) |  | Cost |  | Gain |  | Losses |  | Value
September 30, 2019 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury securities | ​ | $ | 995 | ​ | $ | 12 | ​ | $ | 0 | ​ | $ | 1,007
U.S. government sponsored agencies | ​ | ​ | 2,303 | ​ | ​ | 5 | ​ | ​ | 0 | ​ | ​ | 2,308
Mortgage-backed securities: residential | ​ | ​ | 291,427 | ​ | ​ | 5,217 | ​ | ​ | (412) | ​ | ​ | 296,232
Mortgage-backed securities: commercial | ​ | ​ | 37,335 | ​ | ​ | 334 | ​ | ​ | 0 | ​ | ​ | 37,669
State and municipal securities | ​ | ​ | 262,504 | ​ | ​ | 13,624 | ​ | ​ | (114) | ​ | ​ | 276,014
Total | ​ | $ | 594,564 | ​ | $ | 19,192 | ​ | $ | (526) | ​ | $ | 613,230
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 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
​
Schedule of Available-For-Sale Securities By Maturity | Information regarding the fair value and amortized cost of available-for-sale debt securities by maturity as of September 30, 2019 is presented below. Maturity information is based on contractual maturity for all securities other than mortgage-backed securities. Actual maturities of securities may differ from contractual maturities because borrowers may have the right to prepay the obligation without a prepayment penalty.
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Fair
(dollars in thousands) |  | Cost |  | Value
Due in one year or less | ​ | $ | 4,003 | ​ | $ | 4,013
Due after one year through five years | ​ | ​ | 18,138 | ​ | ​ | 18,529
Due after five years through ten years | ​ | ​ | 28,136 | ​ | ​ | 29,341
Due after ten years | ​ | ​ | 215,525 | ​ | ​ | 227,446
​ | ​ | ​ | 265,802 | ​ | ​ | 279,329
Mortgage-backed securities | ​ | ​ | 328,762 | ​ | ​ | 333,901
Total debt securities | ​ | $ | 594,564 | ​ | $ | 613,230
​
Schedule of Sales of Securities Available For Sale | Securities proceeds, gross gains and gross losses are presented below. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended September 30, | ​ | Nine months ended September 30,
(dollars in thousands) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Sales of securities available-for-sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Proceeds | ​ | $ | 12,725 | ​ | $ | 0 | ​ | $ | 38,544 | ​ | $ | 12,322
Gross gains | ​ | ​ | 13 | ​ | ​ | 0 | ​ | ​ | 151 | ​ | ​ | 21
Gross losses | ​ | ​ | (7) | ​ | ​ | 0 | ​ | ​ | (57) | ​ | ​ | (27)
Number of securities | ​ | ​ | 6 | ​ | ​ | 0 | ​ | ​ | 31 | ​ | ​ | 22
​
Schedule of Available-For-Sale Securities Continuous Unrealized Loss Position | Information regarding securities with unrealized losses as of September 30, 2019 and December 31, 2018 is presented below. The tables divide 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
September 30, 2019 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Mortgage-backed securities: residential | ​ | $ | 20,200 | ​ | $ | 84 | ​ | $ | 19,456 | ​ | $ | 328 | ​ | $ | 39,656 | ​ | $ | 412
State and municipal securities | ​ | ​ | 7,103 | ​ | ​ | 105 | ​ | ​ | 2,761 | ​ | ​ | 9 | ​ | ​ | 9,864 | ​ | ​ | 114
Total temporarily impaired | ​ | $ | 27,303 | ​ | $ | 189 | ​ | $ | 22,217 | ​ | $ | 337 | ​ | $ | 49,520 | ​ | $ | 526
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 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
​
Quantitative Disclosure of Available-For-Sale Securities | The total number of securities with unrealized losses as of September 30, 2019 and December 31, 2018 is presented below. ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than | ​ | 12 months | ​ | ​
​ |  | 12 months |  | or more |  | Total
September 30, 2019 | ​ | ​ | ​ | ​ | ​ | ​
Mortgage-backed securities: residential | ​ | 10 | ​ | 8 | ​ | 18
Mortgage-backed securities: commercial | ​ | 0 | ​ | 0 | ​ | 0
State and municipal securities | ​ | 5 | ​ | 2 | ​ | 7
Total temporarily impaired | ​ | 15 | ​ | 10 | ​ | 25
​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 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
​

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