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Investments (Tables)
9 Months Ended
Sep. 30, 2020
Investments [Abstract]  
Fixed Maturities, Available-for-sale Securities
The following tables set forth the composition of fixed maturity securities (excluding investments classified as trading), as of the dates indicated:
 September 30, 2020
 Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Allowance for Credit LossesFair
Value
 (in thousands)
Fixed maturities, available-for-sale:
U.S. Treasury securities and obligations of U.S. government authorities and agencies$7,203,259 $1,928,710 $12,705 $$9,119,264 
Obligations of U.S. states and their political subdivisions259,429 17,032 256 276,205 
Foreign government bonds160,922 21,978 19 182,881 
U.S. public corporate securities2,691,422 278,335 7,392 2,962,365 
U.S. private corporate securities1,509,192 111,697 6,114 217 1,614,558 
Foreign public corporate securities329,721 24,333 7,032 347,022 
Foreign private corporate securities1,233,676 77,343 11,890 351 1,298,778 
Asset-backed securities(1)804,636 8,765 3,950 809,451 
Commercial mortgage-backed securities649,810 57,148 19 706,939 
Residential mortgage-backed securities(2)74,904 6,552 81,453 
Total fixed maturities, available-for-sale$14,916,971 $2,531,893 $49,380 $568 $17,398,916 

(1)Includes credit-tranched securities collateralized by loan obligations, sub-prime mortgages, auto loans, equipment leases and education loans.
(2)Includes publicly-traded agency pass-through securities and collateralized mortgage obligations.

 December 31, 2019
 Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
OTTI
in AOCI(3)
 (in thousands)
Fixed maturities, available-for-sale:
U.S. Treasury securities and obligations of U.S. government authorities and agencies$6,667,347 $491,943 $39,466 $7,119,824 $
Obligations of U.S. states and their political subdivisions252,304 7,814 436 259,682 
Foreign government bonds203,386 19,518 20 222,884 
U.S. public corporate securities1,615,060 126,947 1,331 1,740,676 
U.S. private corporate securities1,159,962 50,720 3,343 1,207,339 
Foreign public corporate securities321,111 16,989 113 337,987 
Foreign private corporate securities1,171,411 50,069 7,995 1,213,485 
Asset-backed securities(1)443,767 3,405 2,734 444,438 (20)
Commercial mortgage-backed securities557,584 20,941 236 578,289 
Residential mortgage-backed securities(2)73,814 3,960 13 77,761 
Total fixed maturities, available-for-sale$12,465,746 $792,306 $55,687 $13,202,365 $(20)

(1)Includes credit-tranched securities collateralized by loan obligations, sub-prime mortgages, auto loans, equipment leases and education loans.
(2)Includes publicly-traded agency pass-through securities and collateralized mortgage obligations.
(3)Represents the amount of unrealized losses remaining in AOCI, from the impairment measurement date. Amount excludes $14.3 million of net unrealized gains on impaired available-for-sale securities relating to changes in the value of such securities subsequent to the impairment measurement date.
Duration Of Gross Unrealized Losses On Fixed Maturity Securities
The following table sets forth the fair value and gross unrealized losses on available-for-sale fixed maturity securities without an allowance for credit losses aggregated by investment category and length of time that individual fixed maturity securities had been in a continuous unrealized loss position, as of the date indicated:
 September 30, 2020
Less Than Twelve MonthsTwelve Months or MoreTotal
Fair Value  Gross
  Unrealized  Losses
Fair Value  Gross
  Unrealized  Losses
Fair Value  Gross
  Unrealized  Losses
 (in thousands)
Fixed maturities, available-for-sale:
U.S. Treasury securities and obligations of U.S. government authorities and agencies$536,328 $12,705 $$$536,328 $12,705 
Obligations of U.S. states and their political subdivisions13,690 256 13,690 256 
Foreign government bonds252 79 13 331 19 
U.S. public corporate securities264,213 7,027 2,562 365 266,775 7,392 
U.S. private corporate securities73,223 4,579 6,684 1,535 79,907 6,114 
Foreign public corporate securities76,443 7,032 76,443 7,032 
Foreign private corporate securities176,274 5,588 75,774 6,286 252,048 11,874 
Asset-backed securities223,101 1,247 272,737 2,703 495,838 3,950 
Commercial mortgage-backed securities7,252 19 7,252 19 
Residential mortgage-backed securities82 82 
Total fixed maturities, available-for-sale$1,370,776 $38,459 $357,918 $10,905 $1,728,694 $49,364 

The following table sets forth the fair value and gross unrealized losses on fixed maturity securities aggregated by investment category and length of time that individual fixed maturity securities had been in a continuous unrealized loss position, as of the date indicated:
 December 31, 2019
Less Than Twelve MonthsTwelve Months or MoreTotal
Fair Value  Gross
  Unrealized  Losses
Fair Value  Gross
  Unrealized  Losses
Fair Value  Gross
  Unrealized  Losses
 (in thousands)
Fixed maturities, available-for-sale:
U.S. Treasury securities and obligations of U.S. government authorities and agencies$1,336,007 $39,456 $5,855 $10 $1,341,862 $39,466 
Obligations of U.S. states and their political subdivisions97,752 436 97,752 436 
Foreign government bonds804 13 132 936 20 
U.S. public corporate securities93,147 870 15,491 461 108,638 1,331 
U.S. private corporate securities82,709 2,111 59,797 1,232 142,506 3,343 
Foreign public corporate securities50,150 113 50,150 113 
Foreign private corporate securities97,414 1,652 91,863 6,343 189,277 7,995 
Asset-backed securities103,911 717 235,759 2,017 339,670 2,734 
Commercial mortgage-backed securities66,071 236 66,071 236 
Residential mortgage-backed securities633 12 640 13 
Total fixed maturities, available-for-sale$1,928,598 $45,616 $408,904 $10,071 $2,337,502 $55,687 
Fixed Maturities Classified by Contractual Maturity Date
The following table sets forth the amortized cost and fair value of fixed maturities by contractual maturities, as of the date indicated:
 September 30, 2020
Amortized CostFair Value
 (in thousands)
Fixed maturities, available-for-sale:
Due in one year or less$202,191 $204,939 
Due after one year through five years1,184,697 1,244,727 
Due after five years through ten years2,323,234 2,502,344 
Due after ten years9,677,499 11,849,063 
Asset-backed securities804,636 809,451 
Commercial mortgage-backed securities649,810 706,939 
Residential mortgage-backed securities74,904 81,453 
Total fixed maturities, available-for-sale$14,916,971 $17,398,916 
Sources of Fixed Maturity Proceeds, Realized Investment Gains (Losses), and Losses on Impairments
The following table sets forth the sources of fixed maturity proceeds and related investment gains (losses), as well as losses on write-downs, impairments and the allowance for credit losses of fixed maturities, for the periods indicated:
 Three Months Ended
September 30,
Nine Months Ended
September 30,
 2020201920202019
 (in thousands)
Fixed maturities, available-for-sale:
Proceeds from sales(1)$20,268 $77,697 $352,945 $231,106 
Proceeds from maturities/prepayments88,208 125,432 220,109 379,849 
Gross investment gains from sales and maturities24 15 18,279 982 
Gross investment losses from sales and maturities(366)(445)(1,856)(3,086)
OTTI recognized in earnings(2)N/A(769)N/A(2,794)
Write-downs recognized in earnings(3)N/A(693)N/A
(Addition to) release of allowance for credit losses(4)414 N/A(568)N/A

(1)Includes $0.2 million and $14.3 million of non-cash related proceeds due to the timing of trade settlements for the nine months ended September 30, 2020 and 2019, respectively.
(2)For the three and nine months ended September 30, 2019, amounts exclude the portion of OTTI amounts remaining in OCI, representing any difference between the fair value of the impaired debt security and the net present value of its projected future cash flows at the time of impairment.
(3)For the three and nine months ended September 30, 2020, amounts represent write-downs on securities approaching maturity related to foreign exchange movements, securities actively marketed for sale and write-downs of credit adverse securities.
(4)Effective January 1, 2020, credit losses on available-for-sale fixed maturity securities are recorded within the “allowance for credit losses.”
Credit Losses Recognized in Earnings on Fixed Maturity Securities Held by the Company for which a Portion of the OTTI Loss was Recognized in OCI
The following tables set forth the activity in the allowance for credit losses for fixed maturity securities, as of the dates indicated:
Three Months Ended September 30, 2020
U.S. Treasury Securities and Obligations of U.S. StatesForeign Government BondsU.S. and Foreign Corporate SecuritiesAsset-Backed SecuritiesCommercial Mortgage-Backed SecuritiesResidential Mortgage-Backed SecuritiesTotal
(in thousands)
Fixed maturities, available-for-sale:
Balance, beginning of period$$$982 $$$$982 
Additions to allowance for credit losses not previously recorded
216 216 
Reductions for securities sold during the period
Addition (reductions) on securities with previous allowance
(630)(630)
Balance, end of period$$$568 $$$$568 
Nine Months Ended September 30, 2020
U.S. Treasury Securities and Obligations of U.S. StatesForeign Government BondsU.S. and Foreign Corporate SecuritiesAsset-Backed SecuritiesCommercial Mortgage-Backed SecuritiesResidential Mortgage-Backed SecuritiesTotal
(in thousands)
Fixed maturities, available-for-sale:
Balance, beginning of year$$$$$$$
Additions to allowance for credit losses not previously recorded
1,384 1,384 
Reductions for securities sold during the period
(2)(2)
Addition (reductions) on securities with previous allowance
(814)(814)
Balance, end of period$$$568 $$$$568 
Commercial Mortgage and Other Loans
The following table sets forth the composition of “Commercial mortgage and other loans,” as of the dates indicated:
 September 30, 2020December 31, 2019
 Amount
(in thousands)
% of
Total
Amount
(in thousands)
% of
Total
Commercial mortgage and agricultural property loans by property type:
Apartments/Multi-Family$371,216 22.0 %$272,150 18.5 %
Hospitality16,745 1.0 16,819 1.1 
Industrial520,721 30.9 464,528 31.5 
Office365,535 21.7 372,823 25.3 
Other187,116 11.1 156,768 10.6 
Retail130,462 7.7 131,051 8.9 
Total commercial mortgage loans1,591,795 94.4 1,414,139 95.9 
Agricultural property loans93,789 5.6 60,046 4.1 
Total commercial mortgage and agricultural property loans 1,685,584 100.0 %1,474,185 100.0 %
Allowance for credit losses(7,633)(2,663)
Total net commercial mortgage and agricultural property loans 1,677,951 1,471,522 
Other loans:
Other collateralized loans
Allowance for credit losses
Total net other loans
Total net commercial mortgage and other loans$1,677,951 $1,471,522 
Allowance for Credit Losses
The following tables set forth the activity in the allowance for credit losses for commercial mortgage and other loans, as of the dates indicated:
Three Months Ended September 30, 2020
Commercial Mortgage LoansAgricultural Property LoansOther Collateralized LoansTotal
(in thousands)
Balance, beginning of period$6,701 $178 $$6,879 
Addition to (release of) allowance for expected losses646 108 754 
Balance, end of period$7,347 $286 $$7,633 

Nine Months Ended September 30, 2020
Commercial Mortgage LoansAgricultural Property LoansOther Collateralized LoansTotal
(in thousands)
Balance at December 31, 2019$2,622 $41 $$2,663 
Cumulative effect of adoption of ASU 2016-133,118 39 3,157 
Addition to (release of) allowance for expected losses1,607 206 1,813 
Balance at September 30, 2020$7,347 $286 $$7,633 
Financing Receivable Credit Quality Indicators
The following tables set forth key credit quality indicators based upon the recorded investment gross of allowance for credit losses, as of the date indicated:
September 30, 2020
Amortized Cost by Origination Year
20202019201820172016PriorRevolving LoansTotal
(in thousands)
Commercial Mortgage Loans
Loan-to-Value Ratio:
0%-59.99%$$116,872 $26,733 $83,965 $195,585 $255,804 $$678,959 
60%-69.99%140,998 172,412 32,176 139,016 61,536 96,476 642,614 
70%-79.99%51,766 72,514 47,798 60,980 29,388 7,776 270,222 
80% or greater
Total$192,764 $361,798 $106,707 $283,961 $286,509 $360,056 $$1,591,795 
Debt Service Coverage Ratio:
Greater or Equal to 1.2x$192,764 $338,722 $90,462 $283,961 $282,478 $347,475 $$1,535,862 
1.0 - 1.2x023,076 16,245 04,031 9,804 53,156 
Less than 1.0x000002,777 2,777 
Total$192,764 $361,798 $106,707 $283,961 $286,509 $360,056 $$1,591,795 
Agricultural Property Loans
Loan-to-Value Ratio:
0%-59.99%$34,465 $13,769 $1,261 $8,265 $1,180 $32,549 $$91,489 
60%-69.99%2,300 2,300 
70%-79.99%
80% or greater
Total$36,765 $13,769 $1,261 $8,265 $1,180 $32,549 $$93,789 
Debt Service Coverage Ratio:
Greater or Equal to 1.2x$36,765 $13,769 $1,261 $4,277 $1,180 $28,957 $$86,209 
1.0 - 1.2x000000
Less than 1.0x0003,988 03,592 7,580 
Total$36,765 $13,769 $1,261 $8,265 $1,180 $32,549 $$93,789 
Commercial mortgage loans
December 31, 2019
 Debt Service Coverage Ratio
  
> 1.2X
1.0X to <1.2X< 1.0XTotal
  (in thousands) 
Loan-to-Value Ratio:
0%-59.99%$659,217 $6,641 $$665,858 
60%-69.99%499,493 14,078 513,571 
70%-79.99%203,158 30,555 233,713 
80% or greater997 997 
Total commercial mortgage loans$1,361,868 $52,271 $$1,414,139 





Agricultural property loans
December 31, 2019
 Debt Service Coverage Ratio
  
> 1.2X
1.0X to <1.2X< 1.0XTotal
  (in thousands) 
Loan-to-Value Ratio:
0%-59.99%$56,437 $$3,609 $60,046 
60%-69.99%
70%-79.99%
80% or greater
Total agricultural property loans$56,437 $$3,609 $60,046 
Aging of Past Due Commercial Mortgage and Other Loans and Nonaccrual Status
The following tables set forth an aging of past due commercial mortgage and other loans based upon the recorded investment gross of allowance for credit losses, as well as the amount of commercial mortgage and other loans on non-accrual status, as of the dates indicated:
September 30, 2020
Current30-59 Days Past Due60-89 Days Past Due90 Days or More Past Due(1)Total LoansNon-Accrual Status(2)
(in thousands)
Commercial mortgage loans$1,591,795 $$$$1,591,795 $
Agricultural property loans93,789 93,789 3,988 
Other collateralized loans
Total$1,685,584 $$$$1,685,584 $3,988 

(1)As of September 30, 2020, there were no loans in this category accruing interest.
(2)For additional information regarding the Company's policies for accruing interest on loans, see Note 2 to the Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2019.
December 31, 2019
Current30-59 Days Past Due60-89 Days Past Due90 Days or More Past Due(1)Total LoansNon-Accrual Status(2)
(in thousands)
Commercial mortgage loans$1,414,139 $$$$1,414,139 $
Agricultural property loans60,046 60,046 
Total$1,474,185 $$$$1,474,185 $

(1)As of December 31, 2019, there were no loans in this category accruing interest.
(2)For additional information regarding the Company's policies for accruing interest on loans, see Note 2 to the Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2019.
Other Invested Assets
The following table sets forth the composition of “Other invested assets,” as of the dates indicated:
September 30, 2020December 31, 2019
 (in thousands)
LPs/LLCs:
Equity method:
Private equity$22,719 $23,414 
Hedge funds333,340 273,615 
Real estate-related229,304 166,492 
Subtotal equity method585,363 463,521 
Fair value:
Private equity4,095 4,115 
Hedge funds172 194 
Real estate-related6,211 6,181 
Subtotal fair value10,478 10,490 
Total LPs/LLCs595,841 474,011 
Derivative instruments4,769 
Total other invested assets$600,610 $474,013 
Accrued Investment Income
The following table sets forth the composition of “Accrued investment income,” as of the date indicated:
September 30, 2020
(in thousands)
Fixed maturities$111,603 
Equity securities60 
Commercial mortgage and other loans4,835 
Policy loans11 
Short-term investments and cash equivalents388 
Other(1)269 
Total accrued investment income$117,166 

(1)Primarily includes affiliated accrued income.
Net Investment Income
The following table sets forth “Net investment income” by investment type, for the periods indicated:
 Three Months Ended
September 30,
Nine Months Ended
September 30,
 2020201920202019
 (in thousands)
Fixed maturities, available-for-sale$113,538 $100,249 $323,737 $289,289 
Fixed maturities, trading3,972 2,579 9,474 7,497 
Equity securities63 67 194 213 
Commercial mortgage and other loans13,898 12,761 42,517 37,661 
Policy loans182 153 538 430 
Other invested assets15,102 7,083 20,968 23,690 
Short-term investments and cash equivalents4,601 31,807 48,569 62,313 
Gross investment income151,356 154,699 445,997 421,093 
Less: investment expenses(6,687)(5,332)(19,865)(14,685)
Net investment income$144,669 $149,367 $426,132 $406,408 
Realized Investment Gains (Losses), Net
The following table sets forth “Realized investment gains (losses), net” by investment type, for the periods indicated:
 Three Months Ended
September 30,
Nine Months Ended
September 30,
 2020201920202019
 (in thousands)
Fixed maturities(1)$72 $(1,199)$15,162 $(4,898)
Commercial mortgage and other loans(753)950 (2,489)(292)
Derivatives(246,742)(537,079)(4,397,341)(2,768,959)
Other invested assets1,405 2,875 
Short-term investments and cash equivalents44 61 2,364 448 
Realized investment gains (losses), net$(245,974)$(537,267)$(4,379,429)$(2,773,701)
(1)Includes fixed maturity securities classified as available-for-sale and excludes fixed maturity securities classified as trading.
Net Unrealized Gains and (Losses) on Investments
The following table sets forth net unrealized gains (losses) on investments, as of the dates indicated:
September 30, 2020December 31, 2019
(in thousands)
Fixed maturity securities, available-for-sale — with OTTI(1)$ N/A$14,309 
Fixed maturity securities, available-for-sale — all other(1)N/A722,310 
Fixed maturity securities, available-for-sale with an allowance(14)N/A
Fixed maturity securities, available-for-sale without an allowance2,482,527 N/A
Derivatives designated as cash flow hedges(2)22,677 (287)
Affiliated notes4,931 598 
Net unrealized gains (losses) on investments$2,510,121 $736,930 

(1)Effective January 1, 2020, per ASU 2016-13, fixed maturity securities, available-for-sale are no longer required to be disclosed “with OTTI” and “all other”.
(2)For more information on cash flow hedges, see Note 4.