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Investments (Tables) | 3 Months Ended
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Mar. 31, 2018
Schedule of Held-to-maturity Securities [Line Items] |
Schedule of Investments in Fixed Maturity Securities | At December 31, 2017, the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows:
(in thousands) | Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
U.S. Treasury securities, obligations of U.S. Government agencies and Municipalities | $ | 29,970 |  |  | $ | — |  |  | $ | (206 | ) |  | $ | 29,764 |
Corporate debt | 1,072 |  |  | 12 |  |  | — |  |  | 1,084 |
Total | $ | 31,042 |  |  | $ | 12 |  |  | $ | (206 | ) |  | $ | 30,848 |
At March 31, 2018, the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows:
(in thousands) | Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
U.S. Treasury securities, obligations of U.S. Government agencies and Municipalities | $ | 29,560 |  |  | $ | — |  |  | $ | (318 | ) |  | $ | 29,242 |
Corporate debt | 1,072 |  |  | 4 |  |  | (3 | ) |  | 1,073 |
Total | $ | 30,632 |  |  | $ | 4 |  |  | $ | (321 | ) |  | $ | 30,315 |
Summary of Unrealized Loss Position | he following table shows the investments’ gross unrealized loss and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of March 31, 2018:
| Less than 12 Months |  | 12 Months or More |  | Total
(in thousands) | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
U.S. Treasury securities, obligations of U.S. Government agencies and Municipalities | $ | 16,235 |  |  | $ | (261 | ) |  | $ | 12,802 |  |  | $ | (57 | ) |  | $ | 29,037 |  |  | $ | (318 | )
Corporate debt | 803 |  |  | (3 | ) |  | — |  |  | — |  |  | 803 |  |  | (3 | )
Total | $ | 17,038 |  |  | $ | (264 | ) |  | $ | 12,802 |  |  | $ | (57 | ) |  | $ | 29,840 |  |  | $ | (321 | )
December 31, 2017:
| Less than 12 Months |  | 12 Months or More |  | Total
(in thousands) | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
U.S. Treasury securities, obligations of U.S. Government agencies and Municipalities | $ | 17,919 |  |  | $ | (157 | ) |  | $ | 11,845 |  |  | $ | (49 | ) |  | $ | 29,764 |  |  | $ | (206 | )
Corporate debt | 400 |  |  | — |  |  | — |  |  | — |  |  | 400 |  |  | — |
Total | $ | 18,319 |  |  | $ | (157 | ) |  | $ | 11,845 |  |  | $ | (49 | ) |  | $ | 30,164 |  |  | $ | (206 | )
Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity | The amortized cost and estimated fair value of the fixed maturity securities at March 31, 2018 by contractual maturity are set forth below:
(in thousands) | Amortized Cost |  | Fair Value
Years to maturity: |  |  |
Due in one year or less | $ | 12,791 |  |  | $ | 12,756 |
Due after one year through five years | 17,609 |  |  | 17,325 |
Due after five years | 232 |  |  | 234 |
Total | $ | 30,632 |  |  | $ | 30,315 |
The amortized cost and estimated fair value of the fixed maturity securities at December 31, 2017 by contractual maturity are set forth below:
(in thousands) | Amortized Cost |  | Fair Value
Years to maturity: |  |  |
Due in one year or less | $ | 16,934 |  |  | $ | 16,899 |
Due after one year through five years | 13,876 |  |  | 13,708 |
Due after five years | 232 |  |  | 241 |
Total | $ | 31,042 |  |  | $ | 30,848 |

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