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 June 30, 2019 U.S. Treasury bonds $ 243,585 $ 1,746 $ (49 ) $ 245,282 Municipal bonds 1,048,405 38,331 (205 ) 1,086,531 Foreign government bonds 150,800 1,904 (150 ) 152,554 Governmental agency bonds 391,720 5,958 (514 ) 397,164 Governmental agency mortgage-backed securities 3,259,857 42,378 (9,940 ) 3,292,295 U.S. corporate debt securities 526,138 15,896 (1,051 ) 540,983 Foreign corporate debt securities 279,122 6,774 (783 ) 285,113 $ 5,899,627 $ 112,987 $ (12,692 ) $ 5,999,922 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 $1.8 million and $4.9 million, realized losses of $1.7 million and $4.7 million, and proceeds of $231.3 million and $622.7 million for the three and six months ended June 30, 2019, respectively, and realized gains of $0.7 million and $1.3 million, realized losses of $2.6 million and $3.8 million, and proceeds of $186.6 million and $342.3 million for the three and six months ended June 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 June 30, 2019 U.S. Treasury bonds $ 8,921 $ (11 ) $ 14,863 $ (38 ) $ 23,784 $ (49 ) Municipal bonds 9,029 (46 ) 59,364 (159 ) 68,393 (205 ) Foreign government bonds 47,048 (79 ) 13,020 (71 ) 60,068 (150 ) Governmental agency bonds 15,282 (67 ) 45,817 (447 ) 61,099 (514 ) Governmental agency mortgage-backed securities 466,134 (1,963 ) 891,182 (7,977 ) 1,357,316 (9,940 ) U.S. corporate debt securities 66,367 (575 ) 48,940 (476 ) 115,307 (1,051 ) Foreign corporate debt securities 25,369 (400 ) 29,905 (383 ) 55,274 (783 ) $ 638,150 $ (3,141 ) $ 1,103,091 $ (9,551 ) $ 1,741,241 $ (12,692 ) 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 June 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 June 30, 2019. Investments in debt securities at June 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 $ 173,833 $ 63,118 $ 109 $ 6,525 $ 243,585 Estimated fair value $ 173,928 $ 63,656 $ 138 $ 7,560 $ 245,282 Municipal bonds Amortized cost $ 70,793 $ 164,852 $ 256,433 $ 556,327 $ 1,048,405 Estimated fair value $ 71,018 $ 166,972 $ 266,762 $ 581,779 $ 1,086,531 Foreign government bonds Amortized cost $ 25,100 $ 98,871 $ 18,513 $ 8,316 $ 150,800 Estimated fair value $ 25,036 $ 99,847 $ 19,164 $ 8,507 $ 152,554 Governmental agency bonds Amortized cost $ 27,209 $ 120,988 $ 158,143 $ 85,380 $ 391,720 Estimated fair value $ 27,196 $ 121,778 $ 161,447 $ 86,743 $ 397,164 U.S. corporate debt securities Amortized cost $ 42,651 $ 274,338 $ 183,178 $ 25,971 $ 526,138 Estimated fair value $ 42,640 $ 280,571 $ 189,542 $ 28,230 $ 540,983 Foreign corporate debt securities Amortized cost $ 24,110 $ 172,822 $ 73,892 $ 8,298 $ 279,122 Estimated fair value $ 24,134 $ 175,232 $ 76,848 $ 8,899 $ 285,113 Total debt securities excluding mortgage-backed securities Amortized cost $ 363,696 $ 894,989 $ 690,268 $ 690,817 $ 2,639,770 Estimated fair value $ 363,952 $ 908,056 $ 713,901 $ 721,718 $ 2,707,627 Total mortgage-backed securities Amortized cost $ 3,259,857 Estimated fair value $ 3,292,295 Total debt securities Amortized cost $ 5,899,627 Estimated fair value $ 5,999,922 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 June 30, 2019 Preferred stocks $ 17,464 $ 13,440 Common stocks 351,595 385,608 $ 369,059 $ 399,048 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 $8.9 million and $41.4 million were recognized for the three and six months ended June 30, 2019, respectively, as a result of changes in the fair values of equity securities. Included in net gains during the three and six months ended June 30, 2019, were net unrealized gains of $8.4 million and $37.4 million, respectively, related to equity securities still held at June 30, 2019. Net gains of $7.7 million and $1.8 million were recognized for the three and six months ended June 30, 2018, respectively, as a result of changes in the fair values of equity securities. Included in net gains during the three and six months ended June 30, 2018, were net unrealized gains of $5.6 million and $1.8 million, respectively, related to equity securities still held at June 30, 2018. The composition of the investment portfolio at June 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 $ 245,282 100.0 $ — — $ — — $ 245,282 100.0 Municipal bonds 1,045,937 96.3 39,214 3.6 1,380 0.1 1,086,531 100.0 Foreign government bonds 133,639 87.6 13,453 8.8 5,462 3.6 152,554 100.0 Governmental agency bonds 397,164 100.0 — — — — 397,164 100.0 Governmental agency mortgage-backed securities 3,292,295 100.0 — — — — 3,292,295 100.0 U.S. corporate debt securities 250,349 46.3 201,802 37.3 88,832 16.4 540,983 100.0 Foreign corporate debt securities 120,447 42.2 141,873 49.8 22,793 8.0 285,113 100.0 Total debt securities 5,485,113 91.4 396,342 6.6 118,467 2.0 5,999,922 100.0 Preferred stocks 47 0.3 12,230 91.0 1,163 8.7 13,440 100.0 Total $ 5,485,160 91.2 $ 408,572 6.8 $ 119,630 2.0 $ 6,013,362 100.0 Included in debt securities at June 30, 2019, were bank loans totaling $78.6 million, of which $68.7 million were non-investment grade; high yield corporate debt securities totaling $39.5 million, all of which were non-investment grade; and emerging market debt securities totaling $67.1 million, of which $8.9 million were non-investment grade. The composition of the debt securities portfolio in an unrealized loss position at June 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 $ 23,784 100.0 $ — — $ — — $ 23,784 100.0 Municipal bonds 68,393 100.0 — — — — 68,393 100.0 Foreign government bonds 58,156 96.8 — — 1,912 3.2 60,068 100.0 Governmental agency bonds 61,099 100.0 — — — — 61,099 100.0 Governmental agency mortgage-backed securities 1,357,316 100.0 — — — — 1,357,316 100.0 U.S. corporate debt securities 38,572 33.4 24,435 21.2 52,300 45.4 115,307 100.0 Foreign corporate debt securities 23,366 42.3 19,679 35.6 12,229 22.1 55,274 100.0 Total $ 1,630,686 93.7 $ 44,114 2.5 $ 66,441 3.8 $ 1,741,241 100.0 Debt securities in an unrealized loss position at June 30, 2019, included bank loans totaling $58.7 million, of which $53.0 million were non-investment grade; high yield corporate debt securities totaling $11.0 million, all of which were non-investment grade; and emerging market debt securities totaling $4.2 million, of which $2.4 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. |