Debt and Equity Securities | Note 3 – Debt and Equity Securities Investments in debt securities, classified as available-for-sale, are as follows: (in thousands) Amortized Gross unrealized Estimated Gains Losses September 30, 2019 U.S. Treasury bonds $ 208,873 $ 984 $ (283 ) $ 209,574 Municipal bonds 1,041,195 49,524 (129 ) 1,090,590 Foreign government bonds 159,039 2,437 (116 ) 161,360 Governmental agency bonds 364,815 8,736 (115 ) 373,436 Governmental agency mortgage-backed securities 3,155,538 40,519 (9,900 ) 3,186,157 U.S. corporate debt securities 564,505 19,278 (1,179 ) 582,604 Foreign corporate debt securities 270,978 8,106 (384 ) 278,700 $ 5,764,943 $ 129,584 $ (12,106 ) $ 5,882,421 December 31, 2018 U.S. Treasury bonds $ 162,904 $ 741 $ (1,139 ) $ 162,506 Municipal bonds 1,050,134 7,210 (12,309 ) 1,045,035 Foreign government bonds 158,885 571 (2,159 ) 157,297 Governmental agency bonds 319,115 1,145 (4,093 ) 316,167 Governmental agency mortgage-backed securities 3,219,585 12,030 (29,016 ) 3,202,599 U.S. corporate debt securities 575,646 1,113 (15,499 ) 561,260 Foreign corporate debt securities 274,881 551 (6,485 ) 268,947 $ 5,761,150 $ 23,361 $ (70,700 ) $ 5,713,811 Sales of debt securities resulted in realized gains of $3.3 million and $8.2 million, realized losses of $0.5 million and $5.2 million, and proceeds of $229.4 million and $852.1 million for the three and nine months ended September 30, 2019, respectively, and realized gains of $0.6 million and $1.9 million, realized losses of $3.1 million and $6.9 million, and proceeds of $183.1 million and $525.4 million for the three and nine months ended September 30, 2018, respectively. Gross unrealized losses on investments in debt securities are as follows: Less than 12 months 12 months or longer Total (in thousands) Estimated fair value Unrealized losses Estimated fair value Unrealized losses Estimated fair value Unrealized losses September 30, 2019 U.S. Treasury bonds $ 42,776 $ (271 ) $ 4,925 $ (12 ) $ 47,701 $ (283 ) Municipal bonds 42,084 (111 ) 3,397 (18 ) 45,481 (129 ) Foreign government bonds 26,049 (78 ) 10,801 (38 ) 36,850 (116 ) Governmental agency bonds 14,935 (32 ) 32,537 (83 ) 47,472 (115 ) Governmental agency mortgage-backed securities 581,727 (3,900 ) 683,684 (6,000 ) 1,265,411 (9,900 ) U.S. corporate debt securities 69,127 (668 ) 13,933 (511 ) 83,060 (1,179 ) Foreign corporate debt securities 18,494 (148 ) 12,077 (236 ) 30,571 (384 ) $ 795,192 $ (5,208 ) $ 761,354 $ (6,898 ) $ 1,556,546 $ (12,106 ) December 31, 2018 U.S. Treasury bonds $ 19,749 $ (85 ) $ 55,615 $ (1,054 ) $ 75,364 $ (1,139 ) Municipal bonds 172,387 (1,772 ) 369,139 (10,537 ) 541,526 (12,309 ) Foreign government bonds 23,654 (1,037 ) 42,119 (1,122 ) 65,773 (2,159 ) Governmental agency bonds 56,270 (748 ) 90,631 (3,345 ) 146,901 (4,093 ) Governmental agency mortgage-backed securities 850,459 (6,955 ) 982,610 (22,061 ) 1,833,069 (29,016 ) U.S. corporate debt securities 374,473 (10,537 ) 109,844 (4,962 ) 484,317 (15,499 ) Foreign corporate debt securities 175,762 (4,575 ) 50,802 (1,910 ) 226,564 (6,485 ) $ 1,672,754 $ (25,709 ) $ 1,700,760 $ (44,991 ) $ 3,373,514 $ (70,700 ) Based on the Company’s review of its debt securities in an unrealized loss position at September 30, 2019, it determined that the losses were primarily the result of changes in interest rates, which were considered to be temporary, rather than a deterioration in credit quality. The Company does not intend to sell and it is not more likely than not that the Company will be required to sell these securities prior to recovering their amortized cost. As such, the Company does not consider these securities to be other-than-temporarily impaired at September 30, 2019. Investments in debt securities at September 30, 2019, by contractual maturities, are as follows: (in thousands) Due in one year or less Due after one through five years Due after five through ten years Due after ten years Total U.S. Treasury bonds Amortized cost $ 76,388 $ 103,981 $ 24,067 $ 4,437 $ 208,873 Estimated fair value $ 76,438 $ 104,782 $ 24,035 $ 4,319 $ 209,574 Municipal bonds Amortized cost $ 74,855 $ 156,509 $ 303,603 $ 506,228 $ 1,041,195 Estimated fair value $ 75,082 $ 158,756 $ 318,688 $ 538,064 $ 1,090,590 Foreign government bonds Amortized cost $ 12,967 $ 81,436 $ 56,338 $ 8,298 $ 159,039 Estimated fair value $ 12,928 $ 82,186 $ 57,367 $ 8,879 $ 161,360 Governmental agency bonds Amortized cost $ 30,394 $ 119,642 $ 140,215 $ 74,564 $ 364,815 Estimated fair value $ 30,427 $ 120,701 $ 144,471 $ 77,837 $ 373,436 U.S. corporate debt securities Amortized cost $ 45,800 $ 300,810 $ 184,908 $ 32,987 $ 564,505 Estimated fair value $ 45,867 $ 308,609 $ 192,169 $ 35,959 $ 582,604 Foreign corporate debt securities Amortized cost $ 25,623 $ 169,666 $ 66,489 $ 9,200 $ 270,978 Estimated fair value $ 25,656 $ 172,679 $ 70,301 $ 10,064 $ 278,700 Total debt securities excluding mortgage-backed securities Amortized cost $ 266,027 $ 932,044 $ 775,620 $ 635,714 $ 2,609,405 Estimated fair value $ 266,398 $ 947,713 $ 807,031 $ 675,122 $ 2,696,264 Total mortgage-backed securities Amortized cost $ 3,155,538 Estimated fair value $ 3,186,157 Total debt securities Amortized cost $ 5,764,943 Estimated fair value $ 5,882,421 Mortgage-backed securities, which include contractual terms to maturity, are not categorized by contractual maturity as borrowers may have the right to call or prepay obligations with, or without, call or prepayment penalties. Investments in equity securities are as follows: (in thousands) Cost Estimated fair value September 30, 2019 Preferred stocks $ 18,487 $ 14,262 Common stocks 369,852 402,226 $ 388,339 $ 416,488 December 31, 2018 Preferred stocks $ 16,892 $ 14,162 Common stocks 341,460 339,373 $ 358,352 $ 353,535 Net gains (realized and unrealized) of $0.2 million and $41.6 million were recognized for the three and nine months ended September 30, 2019, respectively, as a result of changes in the fair values of equity securities. Included in net gains during the three and nine months ended September 30, 2019, were net unrealized losses of $1.5 million and net unrealized gains of $35.9 million, respectively, related to equity securities still held at September 30, 2019. Net gains of $14.2 million and $16.0 million were recognized for the three and nine months ended September 30, 2018, respectively, as a result of changes in the fair values of equity securities. Included in net gains during the three and nine months ended September 30, 2018, were net unrealized gains of $14.1 million and $15.9 million, respectively, related to equity securities still held at September 30, 2018. The composition of the investment portfolio at September 30, 2019, by credit rating, is as follows: A- or higher BBB+ to BBB- Non-Investment Grade Total (in thousands, except percentages) Estimated fair value Percentage Estimated fair value Percentage Estimated fair value Percentage Estimated fair value Percentage Debt securities: U.S. Treasury bonds $ 209,574 100.0 $ — — $ — — $ 209,574 100.0 Municipal bonds 1,048,526 96.2 40,686 3.7 1,378 0.1 1,090,590 100.0 Foreign government bonds 141,959 87.9 13,820 8.6 5,581 3.5 161,360 100.0 Governmental agency bonds 373,436 100.0 — — — — 373,436 100.0 Governmental agency mortgage-backed securities 3,186,157 100.0 — — — — 3,186,157 100.0 U.S. corporate debt securities 251,999 43.2 236,341 40.6 94,264 16.2 582,604 100.0 Foreign corporate debt securities 104,526 37.5 151,605 54.4 22,569 8.1 278,700 100.0 Total debt securities 5,316,177 90.4 442,452 7.5 123,792 2.1 5,882,421 100.0 Preferred stocks 43 0.3 13,124 92.0 1,095 7.7 14,262 100.0 Total $ 5,316,220 90.2 $ 455,576 7.7 $ 124,887 2.1 $ 5,896,683 100.0 Included in debt securities at September 30, 2019, were bank loans totaling $78.1 million, of which $68.1 million were non-investment grade; high yield corporate debt securities totaling $45.2 million, all of which were non-investment grade; and emerging market debt securities totaling $57.2 million, of which $9.1 million were non-investment grade. The composition of the debt securities portfolio in an unrealized loss position at September 30, 2019, by credit rating, is as follows: A- or higher BBB+ to BBB- Non-Investment Grade Total (in thousands, except percentages) Estimated fair value Percentage Estimated fair value Percentage Estimated fair value Percentage Estimated fair value Percentage U.S. Treasury bonds $ 47,701 100.0 $ — — $ — — $ 47,701 100.0 Municipal bonds 43,010 94.6 2,471 5.4 — — 45,481 100.0 Foreign government bonds 36,850 100.0 — — — — 36,850 100.0 Governmental agency bonds 47,472 100.0 — — — — 47,472 100.0 Governmental agency mortgage-backed securities 1,265,411 100.0 — — — — 1,265,411 100.0 U.S. corporate debt securities 18,790 22.6 29,450 35.5 34,820 41.9 83,060 100.0 Foreign corporate debt securities 13,343 43.7 9,394 30.7 7,834 25.6 30,571 100.0 Total $ 1,472,577 94.6 $ 41,315 2.7 $ 42,654 2.7 $ 1,556,546 100.0 Debt securities in an unrealized loss position at September 30, 2019, included bank loans totaling $29.7 million, of which $28.8 million were non-investment grade; high yield corporate debt securities totaling $13.7 million, all of which were non-investment grade; and emerging market debt securities totaling $0.5 million, of which $0.2 million were non-investment grade. The credit ratings in the above tables reflect published ratings obtained from globally recognized securities rating agencies. If a security was rated differently among the rating agencies, the lowest rating was selected. Governmental agency mortgage-backed securities are not rated by any of the ratings agencies; however, these securities have been included in the above table in the “A- or higher” rating category because the payments of principal and interest are guaranteed by the governmental agency that issued the security. |