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Investments | 6 Months Ended
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Jun. 30, 2019
Investments [Abstract] |
Investments | Investments Fixed Maturity Securities Available-for-Sale The Company holds various types of fixed maturity securities available-for-sale and classifies them as corporate securities (“Corporate”), Canadian and Canadian provincial government securities (“Canadian government”), residential mortgage-backed securities (“RMBS”), asset-backed securities (“ABS”), commercial mortgage-backed securities (“CMBS”), U.S. government and agencies (“U.S. government”), state and political subdivisions, and other foreign government, supranational and foreign government-sponsored enterprises (“Other foreign government”). The following tables provide information relating to investments in fixed maturity securities by sector as of June 30, 2019 and December 31, 2018 (dollars in thousands):
June 30, 2019: |  | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Estimated Fair Value |  | % of Total |  | Other-than- temporary Impairments in AOCI
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
Corporate |  | $ | 26,055,078 |  |  | $ | 1,651,141 |  |  | $ | 70,788 |  |  | $ | 27,635,431 |  |  | 59.8 | % |  | $ | — |
Canadian government |  | 2,960,943 |  |  | 1,613,153 |  |  | 133 |  |  | 4,573,963 |  |  | 9.9 |  |  | — |
RMBS |  | 2,214,963 |  |  | 64,629 |  |  | 3,077 |  |  | 2,276,515 |  |  | 4.9 |  |  | — |
ABS |  | 2,482,012 |  |  | 25,714 |  |  | 13,062 |  |  | 2,494,664 |  |  | 5.4 |  |  | 275 |
CMBS |  | 1,687,024 |  |  | 60,775 |  |  | 514 |  |  | 1,747,285 |  |  | 3.8 |  |  | — |
U.S. government |  | 1,738,348 |  |  | 40,202 |  |  | 370 |  |  | 1,778,180 |  |  | 3.8 |  |  | — |
State and political subdivisions |  | 1,221,461 |  |  | 83,621 |  |  | 1,508 |  |  | 1,303,574 |  |  | 2.9 |  |  | — |
Other foreign government |  | 4,097,789 |  |  | 288,833 |  |  | 6,929 |  |  | 4,379,693 |  |  | 9.5 |  |  | — |
Total fixed maturity securities |  | $ | 42,457,618 |  |  | $ | 3,828,068 |  |  | $ | 96,381 |  |  | $ | 46,189,305 |  |  | 100.0 | % |  | $ | 275 |
December 31, 2018: |  | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Estimated Fair Value |  | % of Total |  | Other-than- temporary Impairments in AOCI
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
Corporate |  | $ | 24,006,407 |  |  | $ | 530,804 |  |  | $ | 555,092 |  |  | $ | 23,982,119 |  |  | 59.9 | % |  | $ | — |
Canadian government |  | 2,768,466 |  |  | 1,126,227 |  |  | 2,308 |  |  | 3,892,385 |  |  | 9.7 |  |  | — |
RMBS |  | 1,872,236 |  |  | 22,267 |  |  | 25,282 |  |  | 1,869,221 |  |  | 4.7 |  |  | — |
ABS |  | 2,171,254 |  |  | 10,779 |  |  | 32,829 |  |  | 2,149,204 |  |  | 5.4 |  |  | 275 |
CMBS |  | 1,428,115 |  |  | 9,153 |  |  | 18,234 |  |  | 1,419,034 |  |  | 3.5 |  |  | — |
U.S. government |  | 2,233,537 |  |  | 10,204 |  |  | 57,867 |  |  | 2,185,874 |  |  | 5.5 |  |  | — |
State and political subdivisions |  | 721,290 |  |  | 39,914 |  |  | 9,010 |  |  | 752,194 |  |  | 1.9 |  |  | — |
Other foreign government |  | 3,680,863 |  |  | 109,320 |  |  | 47,868 |  |  | 3,742,315 |  |  | 9.4 |  |  | — |
Total fixed maturity securities |  | $ | 38,882,168 |  |  | $ | 1,858,668 |  |  | $ | 748,490 |  |  | $ | 39,992,346 |  |  | 100.0 | % |  | $ | 275 |
The Company enters into various collateral arrangements with counterparties that require both the pledging and acceptance of fixed maturity securities as collateral. Pledged fixed maturity securities are included in fixed maturity securities, available-for-sale in the condensed consolidated balance sheets. Fixed maturity securities received as collateral are held in separate custodial accounts and are not recorded on the Company’s condensed consolidated balance sheets. Subject to certain constraints, the Company is permitted by contract to sell or repledge collateral it receives; however, as of June 30, 2019 and December 31, 2018, none of the collateral received had been sold or repledged. The Company also holds assets in trust to satisfy collateral requirements under derivative transactions and certain third-party reinsurance treaties. The following table includes fixed maturity securities pledged and received as collateral and assets in trust held to satisfy collateral requirements under derivative transactions and certain third-party reinsurance treaties as of June 30, 2019 and December 31, 2018 (dollars in thousands):
| June 30, 2019 |  | December 31, 2018
| Amortized Cost |  | Estimated Fair Value |  | Amortized Cost |  | Estimated Fair Value
Fixed maturity securities pledged as collateral | $ | 85,651 |  |  | $ | 89,295 |  |  | $ | 80,891 |  |  | $ | 83,950 |
Fixed maturity securities received as collateral | n/a |  |  | 687,071 |  |  | n/a |  |  | 616,584 |
Assets in trust held to satisfy collateral requirements | 23,697,506 |  |  | 25,212,508 |  |  | 20,072,735 |  |  | 20,366,170 |
The Company monitors its concentrations of financial instruments on an ongoing basis and mitigates credit risk by maintaining a diversified investment portfolio that limits exposure to any one issuer. The Company’s exposure to concentrations of credit risk from single issuers greater than 10% of the Company’s stockholders’ equity included securities of the U.S. government and its agencies as well as the securities disclosed below as of June 30, 2019 and December 31, 2018 (dollars in thousands).
| June 30, 2019 |  | December 31, 2018
| Amortized Cost |  | Estimated Fair Value |  | Amortized Cost |  | Estimated Fair Value
Fixed maturity securities guaranteed or issued by: |  |  |  |  |  |  |
Canadian province of Quebec | $ | 1,168,749 |  |  | $ | 2,115,321 |  |  | $ | 1,091,018 |  |  | $ | 1,757,087 |
Canadian province of Ontario | 978,025 |  |  | 1,361,749 |  |  | 913,642 |  |  | 1,187,526 |
The amortized cost and estimated fair value of fixed maturity securities classified as available-for-sale at June 30, 2019 are shown by contractual maturity in the table below (dollars in thousands). Actual maturities can differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Asset and mortgage-backed securities are shown separately in the table below, as they are not due at a single maturity date.
|  | Amortized Cost |  | Estimated Fair Value
Available-for-sale: |  |  |  |
Due in one year or less |  | $ | 1,305,265 |  |  | $ | 1,314,533 |
Due after one year through five years |  | 8,823,728 |  |  | 9,130,980 |
Due after five years through ten years |  | 9,519,138 |  |  | 10,171,840 |
Due after ten years |  | 16,425,488 |  |  | 19,053,488 |
Asset and mortgage-backed securities |  | 6,383,999 |  |  | 6,518,464 |
Total |  | $ | 42,457,618 |  |  | $ | 46,189,305 |
Corporate Fixed Maturity Securities The tables below show the major industry types of the Company’s corporate fixed maturity holdings as of June 30, 2019 and December 31, 2018 (dollars in thousands):
June 30, 2019: |  |  |  | Estimated |  |
|  | Amortized Cost |  | Fair Value |  | % of Total
Finance |  | $ | 9,865,739 |  |  | $ | 10,385,443 |  |  | 37.6 | %
Industrial |  | 13,063,121 |  |  | 13,878,056 |  |  | 50.2 |
Utility |  | 3,126,218 |  |  | 3,371,932 |  |  | 12.2 |
Total |  | $ | 26,055,078 |  |  | $ | 27,635,431 |  |  | 100.0 | %
December 31, 2018: |  |  |  | Estimated |  |
|  | Amortized Cost |  | Fair Value |  | % of Total
Finance |  | $ | 8,793,742 |  |  | $ | 8,730,568 |  |  | 36.3 | %
Industrial |  | 12,336,857 |  |  | 12,342,111 |  |  | 51.6 |
Utility |  | 2,875,808 |  |  | 2,909,440 |  |  | 12.1 |
Total |  | $ | 24,006,407 |  |  | $ | 23,982,119 |  |  | 100.0 | %
Other-Than-Temporary Impairments - Fixed Maturity Securities As discussed in Note 2 – “Significant Accounting Policies and Pronouncements” of the 2018 Annual Report, a portion of certain other-than-temporary impairment (“OTTI”) losses on fixed maturity securities is recognized in AOCI. For these securities, the net amount recognized in the condensed consolidated statements of income (“credit loss impairments”) represents the difference between the amortized cost of the security and the net present value of its projected future cash flows discounted at the effective interest rate implicit in the debt security prior to impairment. Any remaining difference between the fair value and amortized cost is recognized in AOCI. The amount of pre-tax credit loss impairments on fixed maturity securities held by the Company, for which a portion of the OTTI loss was recognized in AOCI, was $3.7 million as of June 30, 2019 and 2018. There were no changes in these amounts from their respective prior-year ending balances. Unrealized Losses for Fixed Maturity Securities Available-for-Sale The following table presents the total gross unrealized losses for the 921 and 3,109 fixed maturity securities as of June 30, 2019 and December 31, 2018, respectively, where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in thousands):
|  | June 30, 2019 |  | December 31, 2018
|  | Gross Unrealized Losses |  | % of Total |  | Gross Unrealized Losses |  | % of Total
Less than 20% |  | $ | 73,351 |  |  | 76.1 | % |  | $ | 721,015 |  |  | 96.3 | %
20% or more for less than six months |  | 21,995 |  |  | 22.8 |  |  | 21,336 |  |  | 2.9 |
20% or more for six months or greater |  | 1,035 |  |  | 1.1 |  |  | 6,139 |  |  | 0.8 |
Total |  | $ | 96,381 |  |  | 100.0 | % |  | $ | 748,490 |  |  | 100.0 | %
The Company’s determination of whether a decline in value is other-than-temporary includes an analysis of the underlying credit and the extent and duration of a decline in value. The Company’s credit analysis of an investment includes determining whether the issuer is current on its contractual payments, evaluating whether it is probable that the Company will be able to collect all amounts due according to the contractual terms of the security and analyzing the overall ability of the Company to recover the amortized cost of the investment. The following tables present the estimated fair values and gross unrealized losses, including other-than-temporary impairment losses reported in AOCI, for 921 and 3,109 fixed maturity securities that have estimated fair values below amortized cost as of June 30, 2019 and December 31, 2018, respectively (dollars in thousands). These investments are presented by class and grade of security, as well as the length of time the related fair value has remained below amortized cost.
|  | Less than 12 months |  | 12 months or greater |  | Total
|  |  |  | Gross |  |  |  | Gross |  |  |  | Gross
June 30, 2019: |  | Estimated |  | Unrealized |  | Estimated |  | Unrealized |  | Estimated |  | Unrealized
|  | Fair Value |  | Losses |  | Fair Value |  | Losses |  | Fair Value |  | Losses
Investment grade securities: |  |  |  |  |  |  |  |  |  |  |  |
Corporate |  | $ | 780,802 |  |  | $ | 8,757 |  |  | $ | 1,276,130 |  |  | $ | 28,924 |  |  | $ | 2,056,932 |  |  | $ | 37,681 |
Canadian government |  | 2,535 |  |  | 2 |  |  | 17,555 |  |  | 131 |  |  | 20,090 |  |  | 133 |
RMBS |  | 57,572 |  |  | 489 |  |  | 240,046 |  |  | 2,577 |  |  | 297,618 |  |  | 3,066 |
ABS |  | 753,026 |  |  | 5,383 |  |  | 399,818 |  |  | 7,679 |  |  | 1,152,844 |  |  | 13,062 |
CMBS |  | 79,372 |  |  | 240 |  |  | 37,442 |  |  | 274 |  |  | 116,814 |  |  | 514 |
U.S. government |  | 257,328 |  |  | 36 |  |  | 76,098 |  |  | 334 |  |  | 333,426 |  |  | 370 |
State and political subdivisions |  | 42,876 |  |  | 11 |  |  | 13,856 |  |  | 1,497 |  |  | 56,732 |  |  | 1,508 |
Other foreign government |  | 90,066 |  |  | 2,565 |  |  | 110,341 |  |  | 2,697 |  |  | 200,407 |  |  | 5,262 |
Total investment grade securities |  | 2,063,577 |  |  | 17,483 |  |  | 2,171,286 |  |  | 44,113 |  |  | 4,234,863 |  |  | 61,596 |
Below investment grade securities: |  |  |  |  |  |  |  |  |  |  |  |
Corporate |  | 216,611 |  |  | 22,148 |  |  | 139,318 |  |  | 10,959 |  |  | 355,929 |  |  | 33,107 |
RMBS |  | — |  |  | — |  |  | 976 |  |  | 11 |  |  | 976 |  |  | 11 |
Other foreign government |  | 6,337 |  |  | 77 |  |  | 18,664 |  |  | 1,590 |  |  | 25,001 |  |  | 1,667 |
Total below investment grade securities |  | 222,948 |  |  | 22,225 |  |  | 158,958 |  |  | 12,560 |  |  | 381,906 |  |  | 34,785 |
Total fixed maturity securities |  | $ | 2,286,525 |  |  | $ | 39,708 |  |  | $ | 2,330,244 |  |  | $ | 56,673 |  |  | $ | 4,616,769 |  |  | $ | 96,381 |
|  | Less than 12 months |  | 12 months or greater |  | Total
|  |  |  | Gross |  |  |  | Gross |  |  |  | Gross
December 31, 2018: |  | Estimated |  | Unrealized |  | Estimated |  | Unrealized |  | Estimated |  | Unrealized
|  | Fair Value |  | Losses |  | Fair Value |  | Losses |  | Fair Value |  | Losses
Investment grade securities: |  |  |  |  |  |  |  |  |  |  |  |
Corporate |  | $ | 8,505,371 |  |  | $ | 302,604 |  |  | $ | 3,611,266 |  |  | $ | 195,082 |  |  | $ | 12,116,637 |  |  | $ | 497,686 |
Canadian government |  | 25,169 |  |  | 419 |  |  | 131,806 |  |  | 1,612 |  |  | 156,975 |  |  | 2,031 |
RMBS |  | 269,558 |  |  | 2,488 |  |  | 836,741 |  |  | 22,760 |  |  | 1,106,299 |  |  | 25,248 |
ABS |  | 1,102,677 |  |  | 24,271 |  |  | 381,609 |  |  | 8,523 |  |  | 1,484,286 |  |  | 32,794 |
CMBS |  | 384,259 |  |  | 4,304 |  |  | 414,719 |  |  | 13,930 |  |  | 798,978 |  |  | 18,234 |
U.S. government |  | 8,616 |  |  | 80 |  |  | 1,086,694 |  |  | 57,787 |  |  | 1,095,310 |  |  | 57,867 |
State and political subdivisions |  | 103,504 |  |  | 1,538 |  |  | 157,330 |  |  | 7,472 |  |  | 260,834 |  |  | 9,010 |
Other foreign government |  | 789,859 |  |  | 24,509 |  |  | 472,934 |  |  | 17,446 |  |  | 1,262,793 |  |  | 41,955 |
Total investment grade securities |  | 11,189,013 |  |  | 360,213 |  |  | 7,093,099 |  |  | 324,612 |  |  | 18,282,112 |  |  | 684,825 |
Below investment grade securities: |  |  |  |  |  |  |  |  |  |  |  |
Corporate |  | 755,679 |  |  | 42,760 |  |  | 122,559 |  |  | 14,646 |  |  | 878,238 |  |  | 57,406 |
Canadian government |  | 443 |  |  | 34 |  |  | 1,770 |  |  | 243 |  |  | 2,213 |  |  | 277 |
RMBS |  | — |  |  | — |  |  | 1,026 |  |  | 34 |  |  | 1,026 |  |  | 34 |
ABS |  | — |  |  | — |  |  | 1,063 |  |  | 35 |  |  | 1,063 |  |  | 35 |
Other foreign government |  | 128,725 |  |  | 5,574 |  |  | 7,479 |  |  | 339 |  |  | 136,204 |  |  | 5,913 |
Total below investment grade securities |  | 884,847 |  |  | 48,368 |  |  | 133,897 |  |  | 15,297 |  |  | 1,018,744 |  |  | 63,665 |
Total fixed maturity securities |  | $ | 12,073,860 |  |  | $ | 408,581 |  |  | $ | 7,226,996 |  |  | $ | 339,909 |  |  | $ | 19,300,856 |  |  | $ | 748,490 |
The Company has no intention to sell, nor does it expect to be required to sell, the securities outlined in the table above, as of the dates indicated. However, unforeseen facts and circumstances may cause the Company to sell fixed maturity securities in the ordinary course of managing its portfolio to meet certain diversification, credit quality and liquidity guidelines. Changes in unrealized losses are primarily driven by changes in interest rates. Investment Income, Net of Related Expenses Major categories of investment income, net of related expenses, consist of the following (dollars in thousands):
| Three months ended June 30, |  | Six months ended June 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Fixed maturity securities available-for-sale | $ | 427,841 |  |  | $ | 373,624 |  |  | $ | 842,928 |  |  | $ | 742,827 |
Equity securities | 645 |  |  | 709 |  |  | 1,891 |  |  | 2,391 |
Mortgage loans on real estate | 60,509 |  |  | 50,460 |  |  | 120,071 |  |  | 100,659 |
Policy loans | 14,394 |  |  | 14,775 |  |  | 28,503 |  |  | 29,555 |
Funds withheld at interest | 65,972 |  |  | 86,417 |  |  | 127,706 |  |  | 161,862 |
Short-term investments and cash and cash equivalents | 7,465 |  |  | 2,964 |  |  | 14,365 |  |  | 6,209 |
Other invested assets | 31,910 |  |  | 20,785 |  |  | 74,146 |  |  | 44,613 |
Investment income | 608,736 |  |  | 549,734 |  |  | 1,209,610 |  |  | 1,088,116 |
Investment expense | (24,658 | ) |  | (21,673 | ) |  | (45,655 | ) |  | (43,726 | )
Investment income, net of related expenses | $ | 584,078 |  |  | $ | 528,061 |  |  | $ | 1,163,955 |  |  | $ | 1,044,390 |
Investment Related Gains (Losses), Net Investment related gains (losses), net, consist of the following (dollars in thousands):
| Three months ended June 30, |  | Six months ended June 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Fixed maturity securities available-for-sale: |  |  |  |  |  |  |
Other-than-temporary impairment losses | $ | — |  |  | $ | (3,350 | ) |  | $ | (9,453 | ) |  | $ | (3,350 | )
Gain on investment activity | 20,384 |  |  | 21,140 |  |  | 48,429 |  |  | 32,106 |
Loss on investment activity | (6,870 | ) |  | (35,934 | ) |  | (25,593 | ) |  | (56,314 | )
Equity securities: |  |  |  |  |  |  |
Gain on investment activity | — |  |  | 469 |  |  | 74 |  |  | 497 |
Loss on investment activity | — |  |  | — |  |  | (1 | ) |  | (950 | )
Change in unrealized gains (losses) recognized in earnings | 2,673 |  |  | (6,966 | ) |  | 6,417 |  |  | (11,103 | )
Other impairment losses and change in mortgage loan provision | (5,609 | ) |  | (1,357 | ) |  | (7,468 | ) |  | (1,669 | )
Derivatives and other, net | 1,894 |  |  | 15,426 |  |  | 7,855 |  |  | 29,741 |
Total investment related gains (losses), net | $ | 12,472 |  |  | $ | (10,572 | ) |  | $ | 20,260 |  |  | $ | (11,042 | )
There were no fixed maturity impairments for the three months ended June 30, 2019. The fixed maturity impairments for the six months ended June 30, 2019 were primarily related to a U.S. utility company. The fixed maturity impairments for the three and six months ended June 30, 2018 were primarily related to high-yield corporate securities. The other impairment losses and change in mortgage loan provision for the three months ended June 30, 2019 includes impairments on limited partnerships. The other impairment losses and change in mortgage loan provision for the six months ended June 30, 2019 includes impairments on real estate joint ventures and limited partnerships. The other impairment losses and change in mortgage loan provision for the three months and six months ended June 30, 2018 includes impairments on real estate joint ventures. The fluctuations in investment related gains (losses) for derivatives and other for the three and six months ended June 30, 2019, compared to the same periods in 2018, are primarily due to changes in the fair value of embedded derivatives and interest rate swaps. During the three months ended June 30, 2019 and 2018, the Company sold fixed maturity securities with fair values of $466.1 million and $1,174.4 million at losses of $6.9 million and $35.9 million, respectively. During the six months ended June 30, 2019 and 2018, the Company sold fixed maturity securities with fair values of $1,712.7 million and $2,438.0 million at losses of $25.6 million and $56.3 million, respectively. The Company did not sell any equity securities at losses during the three months ended June 30, 2019 and 2018. During the six months ended June 30, 2019, the Company sold equity securities for immaterial losses. During the six months ended June 30, 2018, the Company sold equity securities with fair values $28.4 million at losses of $1.0 million. The Company generally does not buy and sell securities on a short-term basis. Securities Borrowing, Lending and Other The following table includes the amount of borrowed securities, securities lent and securities collateral received as part of the securities lending program and repurchased/reverse repurchased securities pledged and received as of June 30, 2019 and December 31, 2018 (dollars in thousands).
| June 30, 2019 |  | December 31, 2018
| Amortized Cost |  | Estimated Fair Value |  | Amortized Cost |  | Estimated Fair Value
Borrowed securities | $ | 343,093 |  |  | $ | 376,665 |  |  | $ | 335,781 |  |  | $ | 366,663 |
Securities lending: |  |  |  |  |  |  |
Securities loaned | 97,596 |  |  | 103,009 |  |  | 101,981 |  |  | 102,618 |
Securities received | n/a |  |  | 107,000 |  |  | n/a |  |  | 112,000 |
Repurchase program/reverse repurchase program: |  |  |  |  |  |  |
Securities pledged | 576,381 |  |  | 596,412 |  |  | 554,806 |  |  | 554,589 |
Securities received | n/a |  |  | 578,112 |  |  | n/a |  |  | 530,932 |
The Company also held cash collateral for repurchase/reverse repurchase programs of $28.6 million at both June 30, 2019 and December 31, 2018. No cash or securities have been pledged by the Company for its securities borrowing program as of June 30, 2019 and December 31, 2018. The following tables present information on the Company’s securities lending and repurchase transactions as of June 30, 2019 and December 31, 2018 (dollars in thousands). Collateral associated with certain borrowed securities is not included within the table, as the collateral pledged to each counterparty is the right to reinsurance treaty cash flows.
| June 30, 2019
| Remaining Contractual Maturity of the Agreements
| Overnight and Continuous |  | Up to 30 Days |  | 30-90 Days |  | Greater than 90 Days |  | Total
Securities lending transactions: |  |  |  |  |  |  |  |  |
Corporate | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 103,009 |  |  | $ | 103,009 |
Total | — |  |  | — |  |  | — |  |  | 103,009 |  |  | 103,009 |
Repurchase transactions: |  |  |  |  |  |  |  |  |
Corporate | — |  |  | — |  |  | — |  |  | 289,659 |  |  | 289,659 |
U.S. government | — |  |  | — |  |  | — |  |  | 209,581 |  |  | 209,581 |
Foreign government | — |  |  | — |  |  | — |  |  | 97,172 |  |  | 97,172 |
Other | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | — |  |  | — |  |  | — |  |  | 596,412 |  |  | 596,412 |
Total borrowings | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 699,421 |  |  | $ | 699,421 |
Gross amount of recognized liabilities for securities lending and repurchase transactions in preceding table |  | $ | 713,727 |
Amounts related to agreements not included in offsetting disclosure |  | $ | 14,306 |
| December 31, 2018
| Remaining Contractual Maturity of the Agreements
| Overnight and Continuous |  | Up to 30 Days |  | 30-90 Days |  | Greater than 90 Days |  | Total
Securities lending transactions: |  |  |  |  |  |  |  |  |
Corporate | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 102,618 |  |  | $ | 102,618 |
Total | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 102,618 |  |  | $ | 102,618 |
Repurchase transactions: |  |  |  |  |  |  |  |  |
Corporate | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 254,151 |  |  | $ | 254,151 |
U.S. government | — |  |  | — |  |  | — |  |  | 221,572 |  |  | 221,572 |
Foreign government | — |  |  | — |  |  | — |  |  | 78,866 |  |  | 78,866 |
Total | — |  |  | — |  |  | — |  |  | 554,589 |  |  | 554,589 |
Total borrowings | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 657,207 |  |  | $ | 657,207 |
Gross amount of recognized liabilities for securities lending and repurchase transactions in preceding table |  | $ | 671,492 |
Amounts related to agreements not included in offsetting disclosure |  | $ | 14,285 |
The Company has elected to offset amounts recognized as receivables and payables resulting from the repurchase/reverse repurchase programs. After the effect of offsetting, the net amount presented on the condensed consolidated balance sheets was a liability of $0.5 million and $0.4 million as of June 30, 2019 and December 31, 2018, respectively. As of June 30, 2019 and December 31, 2018, the Company recognized payables resulting from cash received as collateral associated with a repurchase agreement as discussed above. Amounts owed to and due from the counterparties may be settled in cash or offset, in accordance with the agreements. Mortgage Loans on Real Estate Mortgage loans represented approximately 8.9% and 9.1% of the Company’s total investments as of June 30, 2019 and December 31, 2018. As of June 30, 2019, mortgage loans were geographically dispersed throughout the U.S. with the largest concentrations in California (16.8%), Texas (13.4%) and Washington (7.1%) and include loans secured by properties in Canada (2.9%) and United Kingdom (0.5%). The recorded investment in mortgage loans on real estate presented below is gross of unamortized deferred loan origination fees and expenses, and valuation allowances. The distribution of mortgage loans by property type is as follows as of June 30, 2019 and December 31, 2018 (dollars in thousands):
|  | June 30, 2019 |  | December 31, 2018
Property type: |  | Carrying Value |  | % of Total |  | Carrying Value |  | % of Total
Office building |  | $ | 1,718,595 |  |  | 31.7 | % |  | $ | 1,725,748 |  |  | 34.6 | %
Retail |  | 1,526,267 |  |  | 28.1 |  |  | 1,432,394 |  |  | 28.7 |
Industrial |  | 1,112,460 |  |  | 20.5 |  |  | 961,924 |  |  | 19.3 |
Apartment |  | 730,452 |  |  | 13.5 |  |  | 571,291 |  |  | 11.5 |
Other commercial |  | 336,371 |  |  | 6.2 |  |  | 291,997 |  |  | 5.9 |
Recorded investment |  | 5,424,145 |  |  | 100.0 | % |  | 4,983,354 |  |  | 100.0 | %
Unamortized balance of loan origination fees and expenses |  | (7,031 | ) |  |  |  | (5,770 | ) |  |
Valuation allowances |  | (11,692 | ) |  |  |  | (11,286 | ) |  |
Total mortgage loans on real estate |  | $ | 5,405,422 |  |  |  |  | $ | 4,966,298 |  |  |
The maturities of mortgage loans as of June 30, 2019 and December 31, 2018 are as follows (dollars in thousands):
|  | June 30, 2019 |  | December 31, 2018
|  | Recorded Investment |  | % of Total |  | Recorded Investment |  | % of Total
Due within five years |  | $ | 1,624,003 |  |  | 29.9 | % |  | $ | 1,425,598 |  |  | 28.6 | %
Due after five years through ten years |  | 2,921,184 |  |  | 53.9 |  |  | 2,686,264 |  |  | 53.9 |
Due after ten years |  | 878,958 |  |  | 16.2 |  |  | 871,492 |  |  | 17.5 |
Total |  | $ | 5,424,145 |  |  | 100.0 | % |  | $ | 4,983,354 |  |  | 100.0 | %
The following tables set forth certain key credit quality indicators of the Company’s recorded investment in mortgage loans as of June 30, 2019 and December 31, 2018 (dollars in thousands):
| Recorded Investment
| Debt Service Ratios |  | Construction Loans |  |  |  |
| >1.20x |  | 1.00x - 1.20x |  | <1.00x |  |  | Total |  | % of Total
June 30, 2019: |  |  |  |  |  |  |  |  |  |  |
Loan-to-Value Ratio |  |  |  |  |  |  |  |  |  |  |
0% - 59.99% | $ | 2,570,786 |  |  | $ | 99,194 |  |  | $ | 64,707 |  |  | $ | — |  |  | $ | 2,734,687 |  |  | 50.4 | %
60% - 69.99% | 1,786,531 |  |  | 108,392 |  |  | 41,680 |  |  | 39,432 |  |  | 1,976,035 |  |  | 36.4 |
70% - 79.99% | 447,382 |  |  | 39,170 |  |  | 22,766 |  |  | — |  |  | 509,318 |  |  | 9.4 |
Greater than 80% | 106,070 |  |  | 49,306 |  |  | 48,729 |  |  | — |  |  | 204,105 |  |  | 3.8 |
Total | $ | 4,910,769 |  |  | $ | 296,062 |  |  | $ | 177,882 |  |  | $ | 39,432 |  |  | $ | 5,424,145 |  |  | 100.0 | %
| Recorded Investment
| Debt Service Ratios |  | Construction Loans |  |  |  |
| >1.20x |  | 1.00x - 1.20x |  | <1.00x |  |  | Total |  | % of Total
December 31, 2018: |  |  |  |  |  |  |  |  |  |  |
Loan-to-Value Ratio |  |  |  |  |  |  |  |  |  |  |
0% - 59.99% | $ | 2,410,556 |  |  | $ | 61,246 |  |  | $ | 38,177 |  |  | $ | 13,691 |  |  | $ | 2,523,670 |  |  | 50.6 | %
60% - 69.99% | 1,618,374 |  |  | 73,908 |  |  | 38,120 |  |  | 18,929 |  |  | 1,749,331 |  |  | 35.1 |
70% - 79.99% | 414,269 |  |  | 48,438 |  |  | 54,440 |  |  | — |  |  | 517,147 |  |  | 10.4 |
Greater than 80% | 117,978 |  |  | 49,668 |  |  | 25,560 |  |  | — |  |  | 193,206 |  |  | 3.9 |
Total | $ | 4,561,177 |  |  | $ | 233,260 |  |  | $ | 156,297 |  |  | $ | 32,620 |  |  | $ | 4,983,354 |  |  | 100.0 | %
The age analysis of the Company’s past due recorded investments in mortgage loans as of June 30, 2019 and December 31, 2018 is as follows (dollars in thousands):
|  | June 30, 2019 |  | December 31, 2018
31-60 days past due |  | $ | 11,715 |  |  | $ | — |
Total past due |  | 11,715 |  |  | — |
Current |  | 5,412,430 |  |  | 4,983,354 |
Total |  | $ | 5,424,145 |  |  | $ | 4,983,354 |
The following table presents the recorded investment in mortgage loans, by method of measuring impairment, and the related valuation allowances as of June 30, 2019 and December 31, 2018 (dollars in thousands):
|  | June 30, 2019 |  | December 31, 2018
Mortgage loans: |  |  |  |
Individually measured for impairment |  | $ | 17,014 |  |  | $ | 30,635 |
Collectively measured for impairment |  | 5,407,131 |  |  | 4,952,719 |
Recorded investment |  | $ | 5,424,145 |  |  | $ | 4,983,354 |
Valuation allowances: |  |  |  |
Individually measured for impairment |  | $ | — |  |  | $ | — |
Collectively measured for impairment |  | 11,692 |  |  | 11,286 |
Total valuation allowances |  | $ | 11,692 |  |  | $ | 11,286 |
Information regarding the Company’s loan valuation allowances for mortgage loans for the three and six months ended June 30, 2019 and 2018 is as follows (dollars in thousands):
|  | Three months ended June 30, |  | Six months ended June 30,
|  | 2019 |  | 2018 |  | 2019 |  | 2018
Balance, beginning of period |  | $ | 11,218 |  |  | $ | 8,864 |  |  | $ | 11,286 |  |  | $ | 9,384 |
Provision (release) |  | 470 |  |  | 845 |  |  | 397 |  |  | 329 |
Translation adjustment |  | 4 |  |  | (3 | ) |  | 9 |  |  | (7 | )
Balance, end of period |  | $ | 11,692 |  |  | $ | 9,706 |  |  | $ | 11,692 |  |  | $ | 9,706 |
Information regarding the portion of the Company’s mortgage loans that were impaired as of June 30, 2019 and December 31, 2018 is as follows (dollars in thousands):
|  | Unpaid Principal Balance |  | Recorded Investment |  | Related Allowance |  | Carrying Value
June 30, 2019: |  |  |  |  |  |  |  |
Impaired mortgage loans with no valuation allowance recorded |  | $ | 17,017 |  |  | $ | 17,014 |  |  | $ | — |  |  | $ | 17,014 |
Impaired mortgage loans with valuation allowance recorded |  | — |  |  | — |  |  | — |  |  | — |
Total impaired mortgage loans |  | $ | 17,017 |  |  | $ | 17,014 |  |  | $ | — |  |  | $ | 17,014 |
December 31, 2018: |  |  |  |  |  |  |  |
Impaired mortgage loans with no valuation allowance recorded |  | $ | 30,660 |  |  | $ | 30,635 |  |  | $ | — |  |  | $ | 30,635 |
Impaired mortgage loans with valuation allowance recorded |  | — |  |  | — |  |  | — |  |  | — |
Total impaired mortgage loans |  | $ | 30,660 |  |  | $ | 30,635 |  |  | $ | — |  |  | $ | 30,635 |
The Company’s average investment balance of impaired mortgage loans and the related interest income are reflected in the table below for the periods indicated (dollars in thousands):
|  | Three months ended June 30,
|  | 2019 |  | 2018
|  | Average Recorded Investment(1) |  | Interest Income |  | Average Recorded Investment(1) |  | Interest Income
Impaired mortgage loans with no valuation allowance recorded |  | $ | 17,047 |  |  | $ | 171 |  |  | $ | 27,038 |  |  | $ | 247 |
Impaired mortgage loans with valuation allowance recorded |  | — |  |  | — |  |  | — |  |  | — |
Total impaired mortgage loans |  | $ | 17,047 |  |  | $ | 171 |  |  | $ | 27,038 |  |  | $ | 247 |
|  | Six months ended June 30,
|  | 2019 |  | 2018
|  | Average Recorded Investment(1) |  | Interest Income |  | Average Recorded Investment(1) |  | Interest Income
Impaired mortgage loans with no valuation allowance recorded |  | $ | 21,576 |  |  | $ | 499 |  |  | $ | 19,978 |  |  | $ | 304 |
Impaired mortgage loans with valuation allowance recorded |  | — |  |  | — |  |  | — |  |  | — |
Total impaired mortgage loans |  | $ | 21,576 |  |  | $ | 499 |  |  | $ | 19,978 |  |  | $ | 304 |
(1) Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balances. The Company did not acquire any impaired mortgage loans during the six months ended June 30, 2019 and 2018. The Company had no mortgage loans that were on a nonaccrual status at June 30, 2019 and December 31, 2018. Policy Loans Policy loans comprised approximately 2.2% and 2.5% of the Company’s total investments as of June 30, 2019 and December 31, 2018, respectively, the majority of which are associated with one client. These policy loans present no credit risk because the amount of the loan cannot exceed the obligation due to the ceding company upon the death of the insured or surrender of the underlying policy. The provisions of the treaties in force and the underlying policies determine the policy loan interest rates. The Company earns a spread between the interest rate earned on policy loans and the interest rate credited to corresponding liabilities. Funds Withheld at Interest Funds withheld at interest comprised approximately 9.3% and 10.6% of the Company’s total investments as of June 30, 2019 and December 31, 2018, respectively. Of the $5.7 billion funds withheld at interest balance, net of embedded derivatives, as of June 30, 2019, $3.6 billion of the balance is associated with one client. For reinsurance agreements written on a modified coinsurance basis and certain agreements written on a coinsurance funds withheld basis, assets equal to the net statutory reserves are withheld and legally owned and managed by the ceding company and are reflected as funds withheld at interest on the Company’s condensed consolidated balance sheets. In the event of a ceding company’s insolvency, the Company would need to assert a claim on the assets supporting its reserve liabilities. However, the risk of loss to the Company is mitigated by its ability to offset amounts it owes the ceding company for claims or allowances against amounts owed to the Company from the ceding company. Other Invested Assets Other invested assets represented approximately 3.5% of the Company’s total investments as of June 30, 2019 and December 31, 2018. Carrying values of these assets as of June 30, 2019 and December 31, 2018 were as follows (dollars in thousands):
|  | June 30, 2019 |  | December 31, 2018
Limited partnership interests and real estate joint ventures |  | $ | 1,008,571 |  |  | $ | 965,094 |
Equity release mortgages |  | 641,611 |  |  | 475,905 |
Derivatives |  | 122,484 |  |  | 180,699 |
FVO contractholder-directed unit-linked investments |  | 255,174 |  |  | 197,770 |
Other |  | 93,566 |  |  | 95,829 |
Total other invested assets |  | $ | 2,121,406 |  |  | $ | 1,915,297 |

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