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MARKETABLE SECURITIES (Tables) | 9 Months Ended
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Sep. 30, 2020
Investments Debt And Equity Securities [Abstract] |
Schedule of Amortized Cost and Fair Value of Securities Available for Sale and Held to Maturity Securities | The following tables summarize the amortized cost and fair value of securities available for sale as of September 30, 2020, and the amortized cost and fair value of securities held to maturity and available for sale, respectively, as of December 31, 2019 and the corresponding amounts of gross unrealized gains and losses:
September 30, 2020 |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 18,619 |  |  | $ | 1,260 |  |  | $ | — |  |  | $ | 19,879 |
Municipal securities |  |  | 164,382 |  |  |  | 10,926 |  |  |  | — |  |  |  | 175,308 |
Mortgage-backed securities |  |  | 95,415 |  |  |  | 3,099 |  |  |  | 143 |  |  |  | 98,371 |
Collateralized mortgage obligations |  |  | 72,714 |  |  |  | 2,618 |  |  |  | 3 |  |  |  | 75,329 |
Total available for sale |  | $ | 351,130 |  |  | $ | 17,903 |  |  | $ | 146 |  |  | $ | 368,887 |
December 31, 2019 |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 19,667 |  |  | $ | 592 |  |  | $ | — |  |  | $ | 20,259 |
Municipal securities |  |  | 16,780 |  |  |  | 576 |  |  |  | 8 |  |  |  | 17,348 |
Mortgage-backed securities |  |  | 83,967 |  |  |  | 550 |  |  |  | 335 |  |  |  | 84,182 |
Collateralized mortgage obligations |  |  | 89,798 |  |  |  | 1,146 |  |  |  | 17 |  |  |  | 90,927 |
Total available for sale |  | $ | 210,212 |  |  | $ | 2,864 |  |  | $ | 360 |  |  | $ | 212,716 |
Held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal securities |  | $ | 138,416 |  |  | $ | 4,710 |  |  | $ | 3 |  |  | $ | 143,123 |
Mortgage-backed securities |  |  | 14,365 |  |  |  | 198 |  |  |  | 13 |  |  |  | 14,550 |
Collateralized mortgage obligations |  |  | 2,677 |  |  |  | 110 |  |  |  | — |  |  |  | 2,787 |
Total held to maturity |  | $ | 155,458 |  |  | $ | 5,018 |  |  | $ | 16 |  |  | $ | 160,460 |
Schedule of Securities with Gross Unrealized Losses | Information pertaining to securities with gross unrealized losses as of September 30, 2020, for which no allowance for credit losses has been recorded, and December 31, 2019, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position is detailed in the following tables:
|  | Less Than 12 Months |  |  | 12 Months or Longer |  |  | Total |
September 30, 2020 |  | Gross Unrealized Losses |  |  | Estimated Fair Value |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | (143 | ) |  | $ | 12,600 |  |  | $ | — |  |  | $ | — |  |  | $ | (143 | ) |  | $ | 12,600 |
Collateralized mortgage obligations |  |  | — |  |  |  | — |  |  |  | (3 | ) |  |  | 1,070 |  |  |  | (3 | ) |  |  | 1,070 |
Total available for sale |  | $ | (143 | ) |  | $ | 12,600 |  |  | $ | (3 | ) |  | $ | 1,070 |  |  | $ | (146 | ) |  | $ | 13,670 |
|  | Less Than 12 Months |  |  | 12 Months or Longer |  |  | Total |
December 31, 2019 |  | Gross Unrealized Losses |  |  | Estimated Fair Value |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal securities |  | $ | (8 | ) |  | $ | 1,138 |  |  | $ | — |  |  | $ | — |  |  | $ | (8 | ) |  | $ | 1,138 |
Mortgage-backed securities |  |  | (25 | ) |  |  | 19,421 |  |  |  | (310 | ) |  |  | 42,116 |  |  |  | (335 | ) |  |  | 61,537 |
Collateralized mortgage obligations |  |  | — |  |  |  | — |  |  |  | (17 | ) |  |  | 2,594 |  |  |  | (17 | ) |  |  | 2,594 |
Total available for sale |  | $ | (33 | ) |  | $ | 20,559 |  |  | $ | (327 | ) |  | $ | 44,710 |  |  | $ | (360 | ) |  | $ | 65,269 |
Held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal securities |  | $ | (1 | ) |  | $ | 1,313 |  |  | $ | (2 | ) |  | $ | 759 |  |  | $ | (3 | ) |  | $ | 2,072 |
Mortgage-backed securities |  |  | — |  |  |  | — |  |  |  | (13 | ) |  |  | 7,032 |  |  |  | (13 | ) |  |  | 7,032 |
Total held to maturity |  | $ | (1 | ) |  | $ | 1,313 |  |  | $ | (15 | ) |  | $ | 7,791 |  |  | $ | (16 | ) |  | $ | 9,104 |
Schedule of Proceeds from Sales of Available for Sale Securities | The proceeds from sales of available for sale securities and the associated losses through the three and nine months ended are listed below for the:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Proceeds from sales |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 3,957 |
Gross gains |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Gross losses |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 22 |
Investments Classified by Contractual Maturity Date | The contractual maturities at September 30, 2020 of available for sale securities at carrying value and estimated fair value are shown below. The Company invests in mortgage-backed securities and collateralized mortgage obligations that have expected maturities that differ from their contractual maturities. These differences arise because borrowers and/or issuers may have the right to call or prepay their obligation with or without call or prepayment penalties.
|  | Available for Sale |
September 30, 2020 |  | Amortized Cost |  |  | Estimated Fair Value |
Due within one year |  | $ | 3,478 |  |  | $ | 3,509 |
Due after one year through five years |  |  | 52,628 |  |  |  | 55,426 |
Due after five years through ten years |  |  | 48,675 |  |  |  | 52,451 |
Due after ten years |  |  | 78,220 |  |  |  | 83,801 |
Mortgage-backed securities |  |  | 95,415 |  |  |  | 98,371 |
Collateralized mortgage obligations |  |  | 72,714 |  |  |  | 75,329 |
Total Securities |  | $ | 351,130 |  |  | $ | 368,887 |

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