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SECURITIES (Tables) | 6 Months Ended
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Jun. 30, 2019
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 is provided in the tables below.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
(dollars in thousands) |  | Cost |  | Gain |  | Losses |  | Value
June 30, 2019 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasury securities | ​ | $ | 995 | ​ | $ | 12 | ​ | $ | 0 | ​ | $ | 1,007
U.S. government sponsored agencies | ​ | ​ | 2,302 | ​ | ​ | 0 | ​ | ​ | (12) | ​ | ​ | 2,290
Mortgage-backed securities: residential | ​ | ​ | 320,298 | ​ | ​ | 4,381 | ​ | ​ | (734) | ​ | ​ | 323,945
Mortgage-backed securities: commercial | ​ | ​ | 37,847 | ​ | ​ | 298 | ​ | ​ | (11) | ​ | ​ | 38,134
State and municipal securities | ​ | ​ | 234,691 | ​ | ​ | 9,782 | ​ | ​ | (23) | ​ | ​ | 244,450
Total | ​ | $ | 596,133 | ​ | $ | 14,473 | ​ | $ | (780) | ​ | $ | 609,826
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
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 June 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 | ​ | $ | 1,655 | ​ | $ | 1,664
Due after one year through five years | ​ | ​ | 19,413 | ​ | ​ | 19,776
Due after five years through ten years | ​ | ​ | 30,528 | ​ | ​ | 31,654
Due after ten years | ​ | ​ | 186,392 | ​ | ​ | 194,653
​ | ​ | ​ | 237,988 | ​ | ​ | 247,747
Mortgage-backed securities | ​ | ​ | 358,145 | ​ | ​ | 362,079
Total debt securities | ​ | $ | 596,133 | ​ | $ | 609,826
​
Schedule of Sales of Securities Available For Sale | Securities proceeds, gross gains and gross losses are presented below.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended June 30, | ​ | Six months ended June 30,
(dollars in thousands) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Sales of securities available-for-sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Proceeds | ​ | $ | 12,126 | ​ | $ | 0 | ​ | $ | 25,819 | ​ | $ | 12,322
Gross gains | ​ | ​ | 68 | ​ | ​ | 0 | ​ | ​ | 138 | ​ | ​ | 21
Gross losses | ​ | ​ | (3) | ​ | ​ | 0 | ​ | ​ | (50) | ​ | ​ | (27)
Number of securities | ​ | ​ | 8 | ​ | ​ | 0 | ​ | ​ | 25 | ​ | ​ | 22
​
Schedule of Available-For-Sale Securities Continuous Unrealized Loss Position | Information regarding securities with unrealized losses as of June 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
June 30, 2019 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government sponsored agencies | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 2,290 | ​ | $ | 12 | ​ | $ | 2,290 | ​ | $ | 12
Mortgage-backed securities: residential | ​ | ​ | 2,411 | ​ | ​ | 23 | ​ | ​ | 79,874 | ​ | ​ | 711 | ​ | ​ | 82,285 | ​ | ​ | 734
Mortgage-backed securities: commercial | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 4,618 | ​ | ​ | 11 | ​ | ​ | 4,618 | ​ | ​ | 11
State and municipal securities | ​ | ​ | 500 | ​ | ​ | 0 | ​ | ​ | 4,826 | ​ | ​ | 23 | ​ | ​ | 5,326 | ​ | ​ | 23
Total temporarily impaired | ​ | $ | 2,911 | ​ | $ | 23 | ​ | $ | 91,608 | ​ | $ | 757 | ​ | $ | 94,519 | ​ | $ | 780
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
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 June 30, 2019 and December 31, 2018 is presented below.
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than | ​ | 12 months | ​ | ​
​ |  | 12 months |  | or more |  | Total
June 30, 2019 | ​ | ​ | ​ | ​ | ​ | ​
U.S. government sponsored agencies | ​ | 0 | ​ | 1 | ​ | 1
Mortgage-backed securities: residential | ​ | 1 | ​ | 30 | ​ | 31
Mortgage-backed securities: commercial | ​ | 0 | ​ | 1 | ​ | 1
State and municipal securities | ​ | 1 | ​ | 4 | ​ | 5
Total temporarily impaired | ​ | 2 | ​ | 36 | ​ | 38
​ | ​ | ​ | ​ | ​ | ​ | ​
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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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References No definition available. + Details
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