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Investment Information (Tables)
9 Months Ended
Sep. 30, 2021
Disclosure Investment Information [Abstract]  
Summary of fair value and cost or amortized cost of available for sale securities
The following table summarizes the fair value and cost or amortized cost of the Company’s securities classified as available for sale:
Estimated
Fair
Value
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Allowance for Expected Credit Losses (2)Cost or
Amortized
Cost
September 30, 2021
Fixed maturities (1):
Corporate bonds$6,403,617 $155,246 $(40,649)$(1,440)$6,290,460 
Mortgage backed securities405,797 3,384 (3,966)(24)406,403 
Municipal bonds382,722 20,096 (1,206)(2)363,834 
Commercial mortgage backed securities579,424 3,598 (548)(3)576,377 
U.S. government and government agencies4,460,515 12,912 (30,320)— 4,477,923 
Non-U.S. government securities1,863,734 46,378 (28,948)(82)1,846,386 
Asset backed securities2,672,554 12,576 (7,700)(560)2,668,238 
Total16,768,363 254,190 (113,337)(2,111)16,629,621 
Short-term investments3,069,965 1,625 (1,780)— 3,070,120 
Total$19,838,328 $255,815 $(115,117)$(2,111)$19,699,741 
December 31, 2020
Fixed maturities (1):
Corporate bonds$7,856,571 $414,247 $(34,388)$(896)$7,477,608 
Mortgage backed securities630,001 8,939 (5,028)(278)626,368 
Municipal bonds494,522 27,291 (3,835)(11)471,077 
Commercial mortgage backed securities389,900 8,722 (2,954)(122)384,254 
U.S. government and government agencies5,557,077 22,612 (12,611)— 5,547,076 
Non-U.S. government securities2,433,733 153,891 (8,060)— 2,287,902 
Asset backed securities1,634,804 19,225 (10,715)(1,090)1,627,384 
Total18,996,608 654,927 (77,591)(2,397)18,421,669 
Short-term investments1,924,922 2,693 (2,063)— 1,924,292 
Total$20,921,530 $657,620 $(79,654)$(2,397)$20,345,961 
(1)    In securities lending transactions, the Company receives collateral in excess of the fair value of the fixed maturities pledged. For purposes of this table, the Company has excluded the collateral received under securities lending, at fair value and included the securities pledged under securities lending, at fair value. See “—Securities Lending Agreements.” In September 2021, the Company terminated its securities lending program and no longer enters into securities lending agreements with financial institutions.
(2)    Effective January 1, 2020, the Company adopted ASU 2016-13 and as a result any credit impairment losses on the Company’s available-for-sale investments are recorded as an allowance, subject to reversal.
Summary of available for sale securities in a continual unrealized loss position
The following table summarizes, for all available for sale securities in an unrealized loss position, the fair value and gross unrealized loss by length of time the security has been in a continual unrealized loss position:
 Less than 12 Months12 Months or MoreTotal
Estimated
Fair
Value
Gross
Unrealized
Losses
Estimated
Fair
Value
Gross
Unrealized
Losses
Estimated
Fair
Value
Gross
Unrealized
Losses
September 30, 2021
Fixed maturities (1):
Corporate bonds$2,744,615 $(36,595)$68,450 $(4,054)$2,813,065 $(40,649)
Mortgage backed securities257,789 (3,113)22,769 (853)280,558 (3,966)
Municipal bonds46,450 (731)7,148 (475)53,598 (1,206)
Commercial mortgage backed securities76,518 (256)6,578 (292)83,096 (548)
U.S. government and government agencies3,621,719 (29,797)9,755 (523)3,631,474 (30,320)
Non-U.S. government securities1,283,266 (27,523)22,304 (1,425)1,305,570 (28,948)
Asset backed securities1,119,638 (6,524)37,078 (1,176)1,156,716 (7,700)
Total9,149,995 (104,539)174,082 (8,798)9,324,077 (113,337)
Short-term investments265,011 (1,780)— — 265,011 (1,780)
Total$9,415,006 $(106,319)$174,082 $(8,798)$9,589,088 $(115,117)
December 31, 2020
Fixed maturities (1):
Corporate bonds$747,442 $(33,086)$3,934 $(1,302)$751,376 $(34,388)
Mortgage backed securities284,619 (4,788)3,637 (240)288,256 (5,028)
Municipal bonds67,937 (3,835)— — 67,937 (3,835)
Commercial mortgage backed securities126,624 (2,916)2,655 (38)129,279 (2,954)
U.S. government and government agencies1,285,907 (12,611)— — 1,285,907 (12,611)
Non-U.S. government securities543,844 (7,658)2,441 (402)546,285 (8,060)
Asset backed securities634,470 (9,110)57,737 (1,605)692,207 (10,715)
Total3,690,843 (74,004)70,404 (3,587)3,761,247 (77,591)
Short-term investments97,920 (2,063)— — 97,920 (2,063)
Total$3,788,763 $(76,067)$70,404 $(3,587)$3,859,167 $(79,654)
(1)    In securities lending transactions, the Company receives collateral in excess of the fair value of the fixed maturities pledged. For purposes of this table, the Company has excluded the collateral received under securities lending, at fair value and included the securities pledged under securities lending, at fair value. See “—Securities Lending Agreements.” In September 2021, the Company terminated its securities lending program and no longer enters into securities lending agreements with financial institutions.
Contractual maturities of the Company's fixed maturities and fixed maturities pledged under securities lending arrangements
The contractual maturities of the Company’s fixed maturities are shown in the following table. Expected maturities, which are management’s best estimates, will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
September 30, 2021December 31, 2020
MaturityEstimated
Fair
Value
Amortized
Cost
Estimated
Fair
Value
Amortized
Cost
Due in one year or less$416,601 $410,373 $348,200 $339,951 
Due after one year through five years7,862,472 7,772,773 10,629,959 10,340,819 
Due after five years through 10 years4,483,025 4,453,526 4,881,564 4,654,754 
Due after 10 years348,490 341,931 482,180 448,139 
 13,110,588 12,978,603 16,341,903 15,783,663 
Mortgage backed securities405,797 406,403 630,001 626,368 
Commercial mortgage backed securities579,424 576,377 389,900 384,254 
Asset backed securities2,672,554 2,668,238 1,634,804 1,627,384 
Total (1)$16,768,363 $16,629,621 $18,996,608 $18,421,669 
(1)    In securities lending transactions, the Company receives collateral in excess of the fair value of the fixed maturities pledged. For purposes of this table, the Company has excluded the collateral received under securities lending, at fair value and included the securities pledged under securities lending, at fair value. See “—Securities Lending Agreements.” In September 2021, the Company terminated its securities lending program and no longer enters into securities lending agreements with financial institutions.
Securities lending transactions accounted for as secured borrowings, by significant investment category
The carrying value of collateral held under the Company’s securities lending transactions by significant investment category and remaining contractual maturity of the underlying agreements was as follows at December 31, 2020 (no balances at September 30, 2021 due to the termination of the program):
Remaining Contractual Maturity of the Agreements
Overnight and ContinuousLess than 30 Days30-90 Days90 Days or MoreTotal
December 31, 2020
U.S. government and government agencies$142,317 $— $139,290 $— $281,607 
Corporate bonds3,021 — — — 3,021 
Equity securities16,461 — — — 16,461 
Total$161,799 $— $139,290 $— $301,089 
Gross amount of recognized liabilities for securities lending in offsetting disclosure in note 10
$— 
Amounts related to securities lending not included in offsetting disclosure in note 10
$301,089 
Summary of assets and liabilities accounted for using the fair value option
The following table summarizes the Company’s other investments and other investable assets:
September 30,
2021
December 31,
2020
Fixed maturities$414,007 $843,354 
Other investments1,489,759 2,331,885 
Short-term investments115,681 557,008 
Equity securities24,523 92,549 
Investments accounted for using the fair value option$2,043,970 $3,824,796 
Other investable assets (1)— 500,000 
Total other investments$2,043,970 $4,324,796 
(1) Participation interests in a receivable of a reverse repurchase agreement.
Summary of other investments
The following table summarizes the Company’s other investments, as detailed in the previous table, by strategy:
September 30,
2021
December 31,
2020
Term loan investments$528,585 $1,231,731 
Lending579,563 572,636 
Credit related funds56,997 90,780 
Energy84,880 65,813 
Investment grade fixed income131,910 138,646 
Infrastructure26,359 165,516 
Private equity81,465 48,750 
Real estate— 18,013 
Total$1,489,759 $2,331,885 
Summary of investments accounted for using equity method
The following table summarizes the Company’s investments accounted for using the equity method, by strategy:
September 30,
2021
December 31,
2020
Credit related funds$952,794 $740,060 
Equities414,322 343,058 
Real estate340,510 258,518 
Lending330,368 179,629 
Private equity365,840 235,289 
Infrastructure222,484 175,882 
Energy114,975 115,453 
Total$2,741,293 $2,047,889 
Summary of investments in limited partnership interests where the Company has a variable interest
The following table summarizes investments in limited partnership interests where the Company has a variable interest by balance sheet line item:
September 30,
2021
December 31,
2020
Investments accounted for using the equity method (1)2,741,293 2,047,889 
Investments accounted for using the fair value option (2)176,884 184,720 
Total$2,918,177 $2,232,609 
(1)    Aggregate unfunded commitments were $2.3 billion at September 30, 2021, compared to $1.8 billion at December 31, 2020.
(2)    Aggregate unfunded commitments were $22.9 million at September 30, 2021, compared to $35.6 million at December 31, 2020.
Components of net investment income
The components of net investment income were derived from the following sources:
September 30,
 20212020
Three Months Ended
Fixed maturities$75,964 $98,344 
Term loans1,736 22,459 
Equity securities9,867 6,659 
Short-term investments1,858 1,332 
Other (1)17,378 22,060 
Gross investment income106,803 150,854 
Investment expenses(18,608)(22,342)
Net investment income$88,195 $128,512 
Nine Months Ended
Fixed maturities$255,215 $318,582 
Term loans33,343 66,141 
Equity securities24,101 18,885 
Short-term investments3,603 9,611 
Other (1)51,683 57,926 
Gross investment income367,945 471,145 
Investment expenses(69,281)(65,995)
Net investment income$298,664 $405,150 
(1)    Includes income distributions from investment funds and other items.
Summary of net realized gains (losses), excluding other-than-temporary impairment provisions
Net realized gains (losses), which include changes in the allowance for credit losses on financial assets and net impairment losses recognized in earnings were as follows:
September 30,
 20212020
Three Months Ended
Available for sale securities:  
Gross gains on investment sales$86,819 $104,733 
Gross losses on investment sales(18,446)(16,862)
Change in fair value of assets and liabilities accounted for using the fair value option:
Fixed maturities(7,492)34,115 
Other investments3,811 61,622 
Equity securities3,042 4,048 
Short-term investments16 3,377 
Equity securities, at fair value:
Net realized gains (losses) on sales during the period14,736 26,549 
Net unrealized gains (losses) on equity securities still held at reporting date(40,155)33,562 
Allowance for credit losses:
Investments related(456)1,332 
Underwriting related(3,985)351 
Derivative instruments (1)(21,435)20,369 
Other (2)(41,495)7,303 
Net realized gains (losses)$(25,040)$280,499 
Nine Months Ended
Available for sale securities:
Gross gains on investment sales$267,362 $515,086 
Gross losses on investment sales(132,071)(98,654)
Change in fair value of assets and liabilities accounted for using the fair value option:
Fixed maturities19,973 (25,370)
Other investments111,550 (67,608)
Equity securities10,599 5,803 
Short-term investments648 (1,936)
Equity securities, at fair value:
Net realized gains (losses) on sales during the period86,155 7,760 
Net unrealized gains (losses) on equity securities still held at reporting date45,400 3,682 
Allowance for credit losses:
Investments related(1,208)(4,763)
Underwriting related2,664 (8,753)
Net impairments losses— (533)
Derivative instruments (1)(36,428)146,722 
Other (2)(54,316)(1,309)
Net realized gains (losses)$320,328 $470,127 
(1)    See note 10 for information on the Company’s derivative instruments.
(2)    2021 periods reflected $33.1 million of losses related to the Company’s deconsolidation of Watford.
Rollforward of the allowance for expected credit losses of securities classified as available for sale
The following table provides a roll forward of the allowance for expected credit losses of the Company’s securities classified as available for sale:
Structured Securities (1)Municipal
Bonds
Corporate
Bonds
Total
Three Months Ended September 30, 2021
Balance at beginning of period$759 $$1,359 $2,124 
Additions for current-period provision for expected credit losses48 — — 48 
Additions (reductions) for previously recognized expected credit losses 14 (4)395 405 
Reductions due to disposals (3)(234)— (232)(466)
Balance at end of period$587 $$1,522 $2,111 
Three Months Ended September 30, 2020
Balance at beginning of period$1,726 $28 $4,115 $5,869 
Additions for current-period provision for expected credit losses27 — 202 229 
Additions (reductions) for previously recognized expected credit losses 403 33 (1,996)(1,560)
Reductions due to disposals(28)— (577)(605)
Balance at end of period$2,128 $61 $1,744 $3,933 
Nine Months Ended September 30, 2021
Balance at beginning of period$1,490 $11 $896 $2,397 
Additions for current-period provision for expected credit losses282 — 2,428 2,710 
Additions (reductions) for previously recognized expected credit losses (751)(9)(557)(1,317)
Reductions due to disposals (3)(434)— (1,245)(1,679)
Balance at end of period$587 $$1,522 $2,111 
Nine Months Ended September 30, 2020
Balance at beginning of period$— $— $— $— 
Cumulative effect of accounting change (2)517 — 117 634 
Additions for current-period provision for expected credit losses2,868 67 7,643 10,578 
Additions (reductions) for previously recognized expected credit losses(903)(4,920)(5,815)
Reductions due to disposals(354)(14)(1,096)(1,464)
Balance at end of period$2,128 $61 $1,744 $3,933 
(1)    Includes asset backed securities, mortgage backed securities and commercial mortgage backed securities.
(2)    Adoption of ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326)”.
(3)    Reduction for the 2021 periods primarily related to the Company’s deconsolidation of Watford.
Summary of restricted assets
The following table details the value of the Company’s restricted assets:
September 30,
2021
December 31,
2020
Assets used for collateral or guarantees:  
Affiliated transactions$4,271,208 $4,643,334 
Third party agreements2,594,053 3,083,324 
Deposits with U.S. regulatory authorities803,878 827,552 
Deposits with non-U.S. regulatory authorities469,497 179,099 
Total restricted assets$8,138,636 $8,733,309 
Reconciliation of cash and restricted cash
The following table details reconciliation of cash and restricted cash within the Consolidated Balance Sheets:
September 30,
2021
December 31,
2020
Cash$1,137,721 $906,448 
Restricted cash (included in ‘other assets’)$411,188 $384,096 
Cash and restricted cash$1,548,909 $1,290,544