Investments in debt and equity securities | Investments in debt and equity securities. The total fair values of the Company's investments in debt and equity securities are as follows: March 31, 2020 December 31, 2019 ($000 omitted) Investments in: Debt securities 584,153 605,721 Equity securities 28,250 39,318 612,403 645,039 As of March 31, 2020 and December 31, 2019 , the net unrealized investment (losses) gains relating to investments in equity securities held were $ (3.8) million and $ 6.9 million, respectively (refer to Note 5). The amortized costs and fair values of investments in debt securities are as follows: March 31, 2020 December 31, 2019 Amortized costs Fair values Amortized costs Fair values ($000 omitted) Municipal 48,780 50,348 52,176 53,823 Corporate 300,203 302,527 299,074 309,142 Foreign 218,918 224,681 234,734 236,073 U.S. Treasury Bonds 6,547 6,597 6,664 6,683 574,448 584,153 592,648 605,721 Foreign debt securities consist of Canadian government and corporate bonds, United Kingdom treasury and corporate bonds, and Mexican government bonds. Gross unrealized gains and losses on investments in debt securities are as follows: March 31, 2020 December 31, 2019 Gains Losses Gains Losses ($000 omitted) Municipal 1,570 2 1,649 2 Corporate 6,203 3,879 10,091 23 Foreign 6,407 644 2,362 1,023 U.S. Treasury Bonds 91 41 60 41 14,271 4,566 14,162 1,089 Debt securities as of March 31, 2020 mature, according to their contractual terms, as follows (actual maturities may differ due to call or prepayment rights): Amortized costs Fair values ($000 omitted) In one year or less 77,995 78,047 After one year through five years 303,007 307,426 After five years through ten years 160,301 166,107 After ten years 33,145 32,573 574,448 584,153 Gross unrealized losses on investments in debt securities and the fair values of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at March 31, 2020 , were: Less than 12 months More than 12 months Total Losses Fair values Losses Fair values Losses Fair values ($000 omitted) Municipal 2 52 — — 2 52 Corporate 3,879 103,187 — — 3,879 103,187 Foreign 584 31,671 60 4,224 644 35,895 U.S. Treasury Bonds — — 41 2,105 41 2,105 4,465 134,910 101 6,329 4,566 141,239 The number of specific debt investment holdings held in an unrealized loss position as of March 31, 2020 was 86 . Of these securities, 9 were in unrealized loss positions for more than 12 months. During 2020, the overall gross unrealized losses on debt securities increased from the prior year-end due to lower investment fair values primarily resulting from increased credit spreads, partially offset by the effect of lower interest rates. Since the Company does not intend to sell and will more likely than not maintain each investment security until its maturity or anticipated recovery, and no significant credit risk is deemed to exist, these investments are not considered as other-than-temporarily impaired. The Company believes its investment portfolio is diversified and expects no material loss to result from the failure to perform by issuers of the debt securities it holds. Investments made by the Company are not collateralized. Gross unrealized losses on investments in debt securities and the fair values of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2019 , were: Less than 12 months More than 12 months Total Losses Fair values Losses Fair values Losses Fair values ($000 omitted) Municipal 2 53 — — 2 53 Corporate 23 7,420 — — 23 7,420 Foreign 318 92,108 705 55,875 1,023 147,983 U.S. Treasury Bonds — — 41 2,215 41 2,215 343 99,581 746 58,090 1,089 157,671 Realized and unrealized gains and losses are detailed as follows: Three Months Ended 2020 2019 ($000 omitted) Investment and other gains 153 162 Investment and other losses (690 ) (305 ) Net unrealized investment (losses) gains recognized on equity securities still held at March 31 (10,554 ) 3,546 (11,091 ) 3,403 Investment gains and losses recognized during the periods ended March 31, 2020 and 2019 related to investments in equity securities are as follows: Three Months Ended 2020 2019 ($000 omitted) Net investment (losses) gains recognized on equity securities during the period (11,061 ) 3,657 Less: Net realized (losses) gains on equity securities sold during the period (507 ) 111 Net unrealized investment (losses) gains recognized on equity securities still held at March 31 (10,554 ) 3,546 Proceeds from sales of investments in securities are as follows: Three Months Ended 2020 2019 ($000 omitted) Proceeds from sales of debt securities 11,503 6,318 Proceeds from sales of equity securities 293 640 Total proceeds from sales of investments in securities 11,796 6,958 |