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Investments (Tables) | 12 Months Ended
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Dec. 31, 2020
Investments [Abstract] |
Schedule of Fixed Maturity Securities | At December 31, 2020 and 2019, the amortized cost and fair value of fixed maturity securities were as follows:
| Amortized Cost (1) |  | Gross Unrealized Gains |  | Gross Unrealized Losses (2) |  | Allowance for Credit Losses |  | Fair Value
| (Dollars in thousands)
December 31, 2020 |  |  |  |  |  |  |  |  |
Fixed maturity securities, available for sale: |  |  |  |  |  |  |  |  |
United States Government full faith and credit | $ | 37,471 |  |  | $ | 2,300 |  |  | $ | — |  |  | $ | — |  |  | $ | 39,771 |
United States Government sponsored agencies | 995,465 |  |  | 44,132 |  |  | (46) |  |  | — |  |  | 1,039,551 |
United States municipalities, states and territories | 3,236,767 |  |  | 543,252 |  |  | (1,044) |  |  | (2,844) |  |  | 3,776,131 |
Foreign government obligations | 177,062 |  |  | 25,644 |  |  | — |  |  | — |  |  | 202,706 |
Corporate securities | 26,745,196 |  |  | 4,507,716 |  |  | (35,892) |  |  | (60,193) |  |  | 31,156,827 |
Residential mortgage backed securities | 1,399,956 |  |  | 117,135 |  |  | (2,526) |  |  | (1,734) |  |  | 1,512,831 |
Commercial mortgage backed securities | 4,119,650 |  |  | 206,255 |  |  | (64,678) |  |  | — |  |  | 4,261,227 |
Other asset backed securities | 5,593,169 |  |  | 103,320 |  |  | (146,640) |  |  | — |  |  | 5,549,849 |
| $ | 42,304,736 |  |  | $ | 5,549,754 |  |  | $ | (250,826) |  |  | $ | (64,771) |  |  | $ | 47,538,893 |
December 31, 2019 |  |  |  |  |  |  |  |  |
Fixed maturity securities, available for sale: |  |  |  |  |  |  |  |  |
United States Government full faith and credit | $ | 161,492 |  |  | $ | 369 |  |  | $ | (96) |  |  | $ | — |  |  | $ | 161,765 |
United States Government sponsored agencies | 601,672 |  |  | 28,133 |  |  | (4,785) |  |  | — |  |  | 625,020 |
United States municipalities, states and territories | 4,147,343 |  |  | 388,578 |  |  | (8,250) |  |  | — |  |  | 4,527,671 |
Foreign government obligations | 186,993 |  |  | 18,103 |  |  | — |  |  | — |  |  | 205,096 |
Corporate securities | 29,822,172 |  |  | 2,796,926 |  |  | (82,259) |  |  | — |  |  | 32,536,839 |
Residential mortgage backed securities | 1,477,738 |  |  | 101,617 |  |  | (3,691) |  |  | — |  |  | 1,575,664 |
Commercial mortgage backed securities | 5,591,167 |  |  | 208,895 |  |  | (13,783) |  |  | — |  |  | 5,786,279 |
Other asset backed securities | 6,250,369 |  |  | 90,978 |  |  | (179,191) |  |  | — |  |  | 6,162,156 |
| $ | 48,238,946 |  |  | $ | 3,633,599 |  |  | $ | (292,055) |  |  | $ | — |  |  | $ | 51,580,490 |
(1) Amortized cost excludes accrued interest receivable of $377.5 million as of December 31, 2020. (2) Gross unrealized losses are net of allowance for credit losses.
Schedule of Fixed Maturity Securities by Contractual Maturity Date | The amortized cost and fair value of fixed maturity securities at December 31, 2020, by contractual maturity are shown below. Actual maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. All of our mortgage and other asset backed securities provide for periodic payments throughout their lives and are shown below as separate lines.
| Available for sale
| Amortized Cost |  | Fair Value
| (Dollars in thousands)
Due in one year or less | $ | 496,563 |  |  | $ | 505,387 |
Due after one year through five years | 7,229,621 |  |  | 7,718,178 |
Due after five years through ten years | 8,167,106 |  |  | 9,166,066 |
Due after ten years through twenty years | 9,254,579 |  |  | 11,396,733 |
Due after twenty years | 6,044,092 |  |  | 7,428,622 |
| 31,191,961 |  |  | 36,214,986 |
Residential mortgage backed securities | 1,399,956 |  |  | 1,512,831 |
Commercial mortgage backed securities | 4,119,650 |  |  | 4,261,227 |
Other asset backed securities | 5,593,169 |  |  | 5,549,849 |
| $ | 42,304,736 |  |  | $ | 47,538,893 |
Schedule of Components of Net Unrealized Gains on Available For Sale Fixed Maturity Securities Reported as Separate Component of Stockholders' Equity | Net unrealized gains on available for sale fixed maturity securities reported as a separate component of stockholders' equity were comprised of the following:
| December 31,
| 2020 |  | 2019
| (Dollars in thousands)
Net unrealized gains on available for sale fixed maturity securities | $ | 5,297,040 |  |  | $ | 3,341,544 |
Adjustments for assumed changes in amortization of deferred policy acquisition costs and deferred sales inducements | (2,250,520) |  |  | (1,473,966) |
Deferred income tax valuation allowance reversal | 22,534 |  |  | 22,534 |
Deferred income tax expense | (639,769) |  |  | (392,191) |
Net unrealized gains reported as accumulated other comprehensive income | $ | 2,429,285 |  |  | $ | 1,497,921 |
Schedule of Credit Quality of Fixed Maturity Security Portfolio by NAIC Designation | The following table summarizes the credit quality, as determined by NAIC designation, of our fixed maturity portfolio as of the dates indicated:
|  | December 31,
|  | 2020 |  | 2019
NAIC Designation |  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
|  | (Dollars in thousands)
1 |  | $ | 23,330,149 |  |  | $ | 26,564,542 |  |  | $ | 27,781,525 |  |  | $ | 30,122,657 |
2 |  | 17,312,485 |  |  | 19,377,013 |  |  | 19,278,355 |  |  | 20,316,911 |
3 |  | 1,292,124 |  |  | 1,299,455 |  |  | 1,001,087 |  |  | 977,191 |
4 |  | 282,049 |  |  | 256,651 |  |  | 114,497 |  |  | 112,534 |
5 |  | 29,396 |  |  | 16,288 |  |  | 57,952 |  |  | 45,205 |
6 |  | 58,533 |  |  | 24,944 |  |  | 5,530 |  |  | 5,992 |
|  | $ | 42,304,736 |  |  | $ | 47,538,893 |  |  | $ | 48,238,946 |  |  | $ | 51,580,490 |
Schedule of Gross Unrealized Losses on Investments, By Category and Length of Time | The following table shows our investments' gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities (consisting of 843 and 1,033 securities, respectively) have been in a continuous unrealized loss position, at December 31, 2020 and 2019:
| Less than 12 months |  | 12 months or more |  | Total
| Fair Value |  | Unrealized Losses (1) |  | Fair Value |  | Unrealized Losses (1) |  | Fair Value |  | Unrealized Losses (1)
| (Dollars in thousands)
December 31, 2020 |  |  |  |  |  |  |  |  |  |  |
Fixed maturity securities, available for sale: |  |  |  |  |  |  |  |  |  |  |
United States Government sponsored agencies | $ | 250,475 |  |  | $ | (46) |  |  | $ | — |  |  | $ | — |  |  | $ | 250,475 |  |  | $ | (46) |
United States municipalities, states and territories | 31,802 |  |  | (3,887) |  |  | 868 |  |  | (1) |  |  | 32,670 |  |  | (3,888) |
Corporate securities: |  |  |  |  |  |  |  |  |  |  |
Finance, insurance and real estate | 109,789 |  |  | (1,733) |  |  | — |  |  | — |  |  | 109,789 |  |  | (1,733) |
Manufacturing, construction and mining | — |  |  | — |  |  | 19,335 |  |  | (1,384) |  |  | 19,335 |  |  | (1,384) |
Utilities and related sectors | 310,823 |  |  | (27,509) |  |  | 35,408 |  |  | (3,628) |  |  | 346,231 |  |  | (31,137) |
Wholesale/retail trade | 65,567 |  |  | (4,344) |  |  | 16,000 |  |  | (26) |  |  | 81,567 |  |  | (4,370) |
Services, media and other | 120,098 |  |  | (11,564) |  |  | 83,890 |  |  | (45,897) |  |  | 203,988 |  |  | (57,461) |
Residential mortgage backed securities | 156,016 |  |  | (2,384) |  |  | 13,599 |  |  | (1,876) |  |  | 169,615 |  |  | (4,260) |
Commercial mortgage backed securities | 934,593 |  |  | (54,834) |  |  | 35,153 |  |  | (9,844) |  |  | 969,746 |  |  | (64,678) |
Other asset backed securities | 1,013,781 |  |  | (16,607) |  |  | 2,567,723 |  |  | (130,033) |  |  | 3,581,504 |  |  | (146,640) |
| $ | 2,992,944 |  |  | $ | (122,908) |  |  | $ | 2,771,976 |  |  | $ | (192,689) |  |  | $ | 5,764,920 |  |  | $ | (315,597) |
December 31, 2019 |  |  |  |  |  |  |  |  |  |  |
Fixed maturity securities, available for sale: |  |  |  |  |  |  |  |  |  |  |
United States Government full faith and credit | $ | 144,582 |  |  | $ | (96) |  |  | $ | — |  |  | $ | — |  |  | $ | 144,582 |  |  | $ | (96) |
United States Government sponsored agencies | 168,732 |  |  | (1,229) |  |  | 201,444 |  |  | (3,556) |  |  | 370,176 |  |  | (4,785) |
United States municipalities, states and territories | 285,481 |  |  | (8,173) |  |  | 3,081 |  |  | (77) |  |  | 288,562 |  |  | (8,250) |
Corporate securities: |  |  |  |  |  |  |  |  |  |  |
Finance, insurance and real estate | 267,521 |  |  | (4,785) |  |  | 121,993 |  |  | (4,744) |  |  | 389,514 |  |  | (9,529) |
Manufacturing, construction and mining | 161,633 |  |  | (6,039) |  |  | 44,606 |  |  | (3,951) |  |  | 206,239 |  |  | (9,990) |
Utilities and related sectors | 334,635 |  |  | (7,730) |  |  | 51,269 |  |  | (3,482) |  |  | 385,904 |  |  | (11,212) |
Wholesale/retail trade | 54,289 |  |  | (1,751) |  |  | 129,364 |  |  | (9,411) |  |  | 183,653 |  |  | (11,162) |
Services, media and other | 275,135 |  |  | (6,135) |  |  | 316,086 |  |  | (34,231) |  |  | 591,221 |  |  | (40,366) |
Residential mortgage backed securities | 212,404 |  |  | (2,686) |  |  | 11,332 |  |  | (1,005) |  |  | 223,736 |  |  | (3,691) |
Commercial mortgage backed securities | 602,394 |  |  | (9,366) |  |  | 194,328 |  |  | (4,417) |  |  | 796,722 |  |  | (13,783) |
Other asset backed securities | 752,413 |  |  | (11,709) |  |  | 3,375,016 |  |  | (167,482) |  |  | 4,127,429 |  |  | (179,191) |
| $ | 3,259,219 |  |  | $ | (59,699) |  |  | $ | 4,448,519 |  |  | $ | (232,356) |  |  | $ | 7,707,738 |  |  | $ | (292,055) |
(1) Unrealized losses have not been reduced to reflect the allowance for credit losses of $64.8 million as of December 31, 2020.
Schedule of Changes in Net Unrealized Gains/Losses on Investments | Changes in net unrealized gains/losses on investments for the years ended December 31, 2020, 2019 and 2018 are as follows:
| Year Ended December 31,
| 2020 |  | 2019 |  | 2018
| (Dollars in thousands)
Fixed maturity securities held for investment carried at amortized cost | $ | — |  |  | $ | — |  |  | $ | 581 |
Fixed maturity securities available for sale carried at fair value | $ | 1,955,496 |  |  | $ | 3,549,007 |  |  | $ | (2,463,693) |
Adjustment for effect on other balance sheet accounts: |  |  |  |  |
Deferred policy acquisition costs and deferred sales inducements | (776,554) |  |  | (1,586,537) |  |  | 1,318,649 |
Deferred income tax asset/liability | (247,578) |  |  | (412,117) |  |  | 240,459 |
| (1,024,132) |  |  | (1,998,654) |  |  | 1,559,108 |
Change in net unrealized gains/losses on investments carried at fair value | $ | 931,364 |  |  | $ | 1,550,353 |  |  | $ | (904,585) |
Components of Net Investment Income | Components of net investment income are as follows:
| Year Ended December 31,
| 2020 |  | 2019 |  | 2018
| (Dollars in thousands)
Fixed maturity securities | $ | 2,035,762 |  |  | $ | 2,171,768 |  |  | $ | 2,027,599 |
Equity securities | 1,090 |  |  | 4,083 |  |  | 4,735 |
Mortgage loans on real estate | 170,749 |  |  | 145,344 |  |  | 131,259 |
Cash and cash equivalents | 4,871 |  |  | 5,164 |  |  | 2,320 |
Other | 2,078 |  |  | 3,119 |  |  | 1,548 |
| 2,214,550 |  |  | 2,329,478 |  |  | 2,167,461 |
Less investment expenses | (32,472) |  |  | (21,843) |  |  | (19,649) |
Net investment income | $ | 2,182,078 |  |  | $ | 2,307,635 |  |  | $ | 2,147,812 |
Net Realized Gains (Losses) on Investments | Net realized gains (losses) on investments for the years ended December 31, 2020, 2019 and 2018 are as follows:
| Year Ended December 31,
| 2020 |  | 2019 |  | 2018
| (Dollars in thousands)
Available for sale fixed maturity securities: |  |  |  |  |
Gross realized gains | $ | 305,170 |  |  | $ | 21,449 |  |  | $ | 12,245 |
Gross realized losses | (276,847) |  |  | (6,397) |  |  | (47,974) |
Credit losses (1) | (94,560) |  |  | — |  |  | — |
| (66,237) |  |  | 15,052 |  |  | (35,729) |
Other investments: |  |  |  |  |
Gross realized gains | — |  |  | 7,296 |  |  | — |
Gross realized losses | — |  |  | (14,446) |  |  | — |
| — |  |  | (7,150) |  |  | — |
Mortgage loans on real estate: |  |  |  |  |
Increase in allowance for credit losses | (15,447) |  |  | (940) |  |  | (3,165) |
Recovery of specific allowance | 712 |  |  | — |  |  | 1,592 |
Gain on sale of mortgage loans | 292 |  |  | — |  |  | 124 |
| (14,443) |  |  | (940) |  |  | (1,449) |
| $ | (80,680) |  |  | $ | 6,962 |  |  | $ | (37,178) |
(1) Prior to adopting authoritative guidance effective January 1, 2020, credit losses on available for sale fixed maturity securities were classified as other than temporary impairments and reported in a separate line item in the Consolidated statements of operations. We recognized $18.7 million and $36.7 million, respectively, of other than temporary impairments during the years ended December 31, 2019 and 2018.
Non-Income Producing Investments | The following table summarizes the carrying value of our investments that have been non-income producing for 12 consecutive months:
| December 31,
| 2020 |  | 2019
| (Dollars in thousands)
Fixed maturity securities, available for sale | $ | 5,766 |  |  | $ | 5,792 |
Rollforward of Allowance for Credit Loss | The following table provides a rollforward of the allowance for credit loss:
| Year Ended December 31, 2020
| United States Municipalities, States and Territories |  | Corporate Securities |  | Commercial Mortgage Backed Securities |  | Residential Mortgage Backed Securities |  | Other Asset Backed Securities |  | Total
| (Dollars in thousands)
Beginning balance (1) | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Additions for credit losses not previously recorded | 2,844 |  |  | 60,193 |  |  | 29,241 |  |  | 1,734 |  |  | 548 |  |  | 94,560 |
Reduction for securities with credit losses due to intent to sell | — |  |  | — |  |  | (21,888) |  |  | — |  |  | (548) |  |  | (22,436) |
Reduction for securities sold during the period | — |  |  | — |  |  | (7,353) |  |  | — |  |  | — |  |  | (7,353) |
Ending balance | $ | 2,844 |  |  | $ | 60,193 |  |  | $ | — |  |  | $ | 1,734 |  |  | $ | — |  |  | $ | 64,771 |
(1) The allowance for credit loss associated with available for sale fixed maturity securities was applied prospectively upon adoption of authoritative guidance effective January 1, 2020. See Note 1 - Significant Accounting Policies for further details.
Other Than Temporary Impairment, Credit Losses Recognized in Earnings | The cumulative portion of other than temporary impairments determined to be credit losses which have been recognized in operations for debt securities are summarized as follows:
|  |  | Year Ended December 31,
|  |  | 2019
|  |  | (Dollars in thousands)
Cumulative credit loss at beginning of year |  |  | $ | (175,398) |
Additions for the amount related to credit losses for which OTTI has not previously been recognized |  |  | (18,271) |
Additional credit losses on securities for which OTTI has previously been recognized |  |  | (455) |
Accumulated losses on securities that were disposed of during the period |  |  | 24,422 |
Cumulative credit loss at end of year |  |  | $ | (169,702) |
Schedule of Other Than Temporary Impairment Losses, Investments | The following table summarizes the cumulative noncredit portion of OTTI and the change in fair value since recognition of OTTI, both of which were recognized in other comprehensive income, by major type of security, for securities that are part of our investment portfolio at December 31, 2019:
| Amortized Cost |  | OTTI Recognized in Other Comprehensive Income (Loss) |  | Change in Fair Value Since OTTI was Recognized |  | Fair Value
| (Dollars in thousands)
December 31, 2019 |  |  |  |  |  |  |
Fixed maturity securities, available for sale: |  |  |  |  |  |  |
Corporate securities | $ | 50,755 |  |  | $ | (3,700) |  |  | $ | 9,268 |  |  | $ | 56,323 |
Residential mortgage backed securities | 183,948 |  |  | (145,446) |  |  | 172,577 |  |  | 211,079 |
Commercial mortgage backed securities | 12,776 |  |  | — |  |  | (401) |  |  | 12,375 |
Other asset backed securities | 977 |  |  | — |  |  | 261 |  |  | 1,238 |
| $ | 248,456 |  |  | $ | (149,146) |  |  | $ | 181,705 |  |  | $ | 281,015 |

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- Definition Tabular disclosure of investments in an unrealized loss position for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), including: (a) the aggregate related fair value of investments with unrealized losses, (b) the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563 + Details
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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563 + Details
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