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SECURITIES | 9 Months Ended
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Sep. 30, 2020
SECURITIES |
SECURITIES | NOTE 2. 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, 2020 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government sponsored agencies |  | $ | 10,000 |  | $ | 26 |  | $ | 0 |  | $ | 10,026
Mortgage-backed securities: residential | ​ | ​ | 238,062 | ​ | ​ | 10,232 | ​ | ​ | (28) | ​ | ​ | 248,266
Mortgage-backed securities: commercial | ​ |  | 38,026 | ​ | ​ | 1,135 | ​ | ​ | 0 | ​ | ​ | 39,161
State and municipal securities | ​ |  | 324,237 | ​ | ​ | 22,533 | ​ | ​ | (189) | ​ | ​ | 346,581
Total | ​ | $ | 610,325 | ​ | $ | 33,926 | ​ | $ | (217) | ​ | $ | 644,034
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2019 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Mortgage-backed securities: residential | ​ | $ | 283,817 | ​ | $ | 4,751 | ​ | $ | (387) | ​ | $ | 288,181
Mortgage-backed securities: commercial | ​ |  | 36,712 | ​ | ​ | 262 | ​ | ​ | (2) | ​ | ​ | 36,972
State and municipal securities | ​ |  | 270,480 | ​ | ​ | 12,828 | ​ | ​ | (228) | ​ | ​ | 283,080
Total | ​ | $ | 591,009 | ​ | $ | 17,841 | ​ | $ | (617) | ​ | $ | 608,233
​ Information regarding the fair value and amortized cost of available-for-sale debt securities by maturity as of September 30, 2020 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 | ​ | $ | 2,436 | ​ | $ | 2,454
Due after one year through five years | ​ |  | 14,118 | ​ | ​ | 14,541
Due after five years through ten years | ​ |  | 29,681 | ​ | ​ | 31,773
Due after ten years | ​ |  | 288,002 | ​ | ​ | 307,839
​ | ​ |  | 334,237 | ​ | ​ | 356,607
Mortgage-backed securities | ​ |  | 276,088 | ​ | ​ | 287,427
Total debt securities | ​ | $ | 610,325 | ​ | $ | 644,034
​ Securities proceeds, gross gains and gross losses are presented below. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three months ended September 30, | ​ | Nine months ended September 30, |
(dollars in thousands) |  | 2020 |  | 2019 |  | 2020 |  | 2019 |
Sales of securities available-for-sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Proceeds | ​ | $ | 5,265 | ​ | $ | 12,725 | ​ | $ | 6,413 | ​ | $ | 38,544 | ​
Gross gains | ​ |  | 314 | ​ | ​ | 13 | ​ | ​ | 363 | ​ | ​ | 151 | ​
Gross losses | ​ |  | 0 | ​ | ​ | (7) | ​ | ​ | 0 | ​ | ​ | (57) | ​
Number of securities | ​ |  | 12 | ​ | ​ | 6 | ​ | ​ | 15 | ​ | ​ | 31 | ​
​ In accordance with ASU No. 2017-08, purchase premiums for callable securities are amortized to the earliest call date and premiums on non-callable securities as well as discounts are recognized in interest income using the interest method over the terms of the securities or over the estimated lives of mortgage-backed securities. Gains and losses on sales are based on the amortized cost of the security sold and recorded on the trade date. Securities with carrying values of $400.7 million and $59.3 million were pledged as of September 30, 2020 and December 31, 2019, respectively, as collateral for borrowings from the Federal Home Loan Bank and for other purposes as permitted or required by law. Information regarding securities with unrealized losses as of September 30, 2020 and December 31, 2019 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, 2020 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Mortgage-backed securities: residential | ​ | $ | 0 | ​ | $ | 0 | ​ | $ | 4,135 | ​ | $ | 28 | ​ | $ | 4,135 | ​ | $ | 28
Mortgage-backed securities: commercial | ​ |  | 7 | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 7 | ​ | ​ | 0
State and municipal securities | ​ |  | 21,135 | ​ | ​ | 189 | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 21,135 | ​ | ​ | 189
Total temporarily impaired | ​ | $ | 21,142 | ​ | $ | 189 | ​ | $ | 4,135 | ​ | $ | 28 | ​ | $ | 25,277 | ​ | $ | 217
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2019 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Mortgage-backed securities: residential | ​ | $ | 23,436 | ​ | $ | 112 | ​ | $ | 14,174 | ​ | $ | 275 | ​ | $ | 37,610 | ​ | $ | 387
Mortgage-backed securities: commercial | ​ |  | 4,591 | ​ | ​ | 2 | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 4,591 | ​ | ​ | 2
State and municipal securities | ​ |  | 14,188 | ​ | ​ | 228 | ​ | ​ | 0 | ​ | ​ | 0 | ​ | ​ | 14,188 | ​ | ​ | 228
Total temporarily impaired | ​ | $ | 42,215 | ​ | $ | 342 | ​ | $ | 14,174 | ​ | $ | 275 | ​ | $ | 56,389 | ​ | $ | 617
​ The total number of securities with unrealized losses as of September 30, 2020 and December 31, 2019 is presented below. ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than | ​ | 12 months | ​ | ​
​ |  | 12 months |  | or more |  | Total
September 30, 2020 | ​ | ​ | ​ | ​ | ​ | ​
Mortgage-backed securities: residential |  | 0 | ​ | 2 | ​ | 2
Mortgage-backed securities: commercial |  | 1 | ​ | 0 | ​ | 1
State and municipal securities |  | 17 | ​ | 0 | ​ | 17
Total temporarily impaired |  | 18 | ​ | 2 | ​ | 20
​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2019 | ​ | ​ | ​ | ​ | ​ | ​
Mortgage-backed securities: residential |  | 7 | ​ | 6 | ​ | 13
Mortgage-backed securities: commercial |  | 1 | ​ | 0 | ​ | 1
State and municipal securities |  | 11 | ​ | 0 | ​ | 11
Total temporarily impaired |  | 19 | ​ | 6 | ​ | 25
​ The following factors are considered in determining whether or not the impairment of these securities is other-than-temporary. In making this determination, management considers the extent and duration of the unrealized loss, and the financial condition and near-term prospects of the issuer, as well as the underlying fundamentals of the relevant market and the outlook for such market in the near future. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in the income statement and 2) OTTI related to other factors, which is recognized in other comprehensive income. Credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. As of September 30, 2020, and December 31, 2019, all of the securities in the Company’s portfolio were backed by the U.S. government, government agencies, government sponsored entities or were A-rated or better, except for certain non-local or local municipal securities, which are not rated. For the government, government agency, government-sponsored entity and municipal securities, management did not believe that there would be credit losses or that full principal would not be received. Management considers the unrealized losses on these securities to be primarily interest rate driven and does not expect material losses given current market conditions unless the securities are sold. However, at this time management does not have the intent to sell, and it is more likely than not that the Company will not be required to sell these securities before the recovery of their amortized cost basis.

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