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Investments In Fixed Maturity Securities
9 Months Ended
Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]  
Investments In Fixed Maturity Securities Investments in Fixed Maturity Securities
    At September 30, 2024 and December 31, 2023, investments in fixed maturity securities were as follows:
 
(In thousands)Amortized
Cost
Allowance for Expected Credit Losses (1)Gross UnrealizedFair
Value
Carrying
Value
GainsLosses
September 30, 2024
Held to maturity:
State and municipal$41,561 $(30)$1,944 $— $43,475 $41,531 
Residential mortgage-backed2,398 — 109 — 2,507 2,398 
Total held to maturity43,959 (30)2,053 — 45,982 43,929 
Available for sale:
U.S. government and government agency2,083,085 — 23,974 (36,074)2,070,985 2,070,985 
State and municipal:
Special revenue1,732,996 — 8,414 (51,652)1,689,758 1,689,758 
State general obligation273,232 — 4,565 (7,375)270,422 270,422 
Pre-refunded85,683 — 1,260 (90)86,853 86,853 
Corporate backed168,276 — 1,847 (4,968)165,155 165,155 
Local general obligation307,754 — 2,483 (6,123)304,114 304,114 
Total state and municipal2,567,941 — 18,569 (70,208)2,516,302 2,516,302 
Mortgage-backed:
Residential2,736,493 — 31,527 (130,929)2,637,091 2,637,091 
Commercial600,597 (52)3,254 (2,918)600,881 600,881 
Total mortgage-backed3,337,090 (52)34,781 (133,847)3,237,972 3,237,972 
Asset-backed4,118,052 (546)26,592 (36,777)4,107,321 4,107,321 
Corporate:
Industrial3,980,058 — 55,042 (80,692)3,954,408 3,954,408 
Financial3,326,838 — 54,929 (33,205)3,348,562 3,348,562 
Utilities774,956 — 13,319 (13,877)774,398 774,398 
Other774,274 — 4,715 (3,593)775,396 775,396 
Total corporate8,856,126 — 128,005 (131,367)8,852,764 8,852,764 
Foreign government1,996,895 (6,355)23,701 (179,636)1,834,605 1,834,605 
Total available for sale22,959,189 (6,953)255,622 (587,909)22,619,949 22,619,949 
Total investments in fixed maturity securities$23,003,148 $(6,983)$257,675 $(587,909)$22,665,931 $22,663,878 
____________
(1) Represents the amount of impairment that has resulted from credit-related factors. The change in the allowance for expected credit losses is recognized in the consolidated statements of income. Amount excludes unrealized losses relating to non-credit factors.
(In thousands)Amortized
Cost
Allowance for Expected Credit Losses (1)Gross UnrealizedFair
Value
Carrying
Value
GainsLosses
December 31, 2023
Held to maturity:
State and municipal$50,547 $(43)$3,132 $— $53,636 $50,504 
Residential mortgage-backed2,868 — 107 — 2,975 2,868 
Total held to maturity53,415 (43)3,239 — 56,611 53,372 
Available for sale:
U.S. government and government agency1,762,997 — 11,403 (57,669)1,716,731 1,716,731 
State and municipal:
Special revenue1,682,550 — 5,651 (82,006)1,606,195 1,606,195 
State general obligation394,429 — 3,550 (16,405)381,574 381,574 
Pre-refunded103,029 — 1,634 (185)104,478 104,478 
Corporate backed166,873 (757)696 (11,973)154,839 154,839 
Local general obligation396,041 — 3,188 (11,893)387,336 387,336 
Total state and municipal2,742,922 (757)14,719 (122,462)2,634,422 2,634,422 
Mortgage-backed:
Residential1,773,206 — 12,780 (163,844)1,622,142 1,622,142 
Commercial657,157 (158)626 (13,312)644,313 644,313 
Total mortgage-backed2,430,363 (158)13,406 (177,156)2,266,455 2,266,455 
Asset-backed4,252,883 (1,164)8,527 (73,206)4,187,040 4,187,040 
Corporate:
Industrial3,679,219 (40)24,312 (143,936)3,559,555 3,559,555 
Financial2,838,220 (4,986)14,681 (68,681)2,779,234 2,779,234 
Utilities701,865 — 6,471 (23,412)684,924 684,924 
Other635,975 — 1,605 (7,234)630,346 630,346 
Total corporate7,855,279 (5,026)47,069 (243,263)7,654,059 7,654,059 
Foreign government1,817,386 (29,603)15,865 (137,419)1,666,229 1,666,229 
Total available for sale20,861,830 (36,708)110,989 (811,175)20,124,936 20,124,936 
Total investments in fixed maturity securities$20,915,245 $(36,751)$114,228 $(811,175)$20,181,547 $20,178,308 
____________
(1) Represents the amount of impairment that has resulted from credit-related factors. The change in the allowance for expected credit losses is recognized in the consolidated statements of income. Amount excludes unrealized losses relating to non-credit factors.

The following table presents the rollforward of the allowance for expected credit losses for held to maturity securities for the nine months ended September 30, 2024 and 2023:
(In thousands)20242023
Allowance for expected credit losses, beginning of period$43 $114 
Change in expected credit losses(13)(66)
Allowance for expected credit losses, end of period$30 $48 

The following table presents the rollforward of the allowance for expected credit losses for held to maturity securities for the three months ended September 30, 2024 and 2023:
(In thousands)20242023
Allowance for expected credit losses, beginning of period$34 $53 
Change in expected credit losses(4)(5)
Allowance for expected credit losses, end of period$30 $48 
The following table presents the rollforward of the allowance for expected credit losses for available for sale securities for the nine months ended September 30, 2024 and 2023:
20242023
(In thousands)Foreign GovernmentCorporateMortgage-backedAsset-backedState and MunicipalTotalForeign GovernmentCorporateMortgage-backedAsset-backedState and MunicipalTotal
Balance, beginning of period$29,603 $5,026 $158 $1,164 $757 $36,708 $32,633 $4,701 $18 $— $— $37,352 
Change on securities for which credit losses were not previously recorded347 — 1,701 — — 2,048 — 942 1,766 1,444 821 4,973 
Change on securities for which credit losses were previously recorded(23,216)(5,026)(1,246)(618)(757)(30,863)3,538 134 316 58 — 4,046 
Reduction due to disposals(379)— (561)— — (940)— (7)— — — (7)
Balance, end of period$6,355 $— $52 $546 $— $6,953 $36,171 $5,770 $2,100 $1,502 $821 $46,364 
During the nine months ended September 30, 2024, the Company decreased the allowance for expected credit losses for available for sale securities utilizing its credit loss assessment process and inputs used in its credit loss model, primarily due to improved pricing associated with foreign government securities and corporate securities. During the nine months ended September 30, 2023, the Company increased the allowance for expected credit losses for available for sale securities in part due to changes in economic assumptions utilized in its credit loss model, primarily affecting the financial services and real estate sectors, and an increase in unrealized loss related to the foreign government portfolio.
The following table presents the rollforward of the allowance for expected credit losses for available for sale securities for the three months ended September 30, 2024 and 2023:
20242023
(In thousands)Foreign GovernmentCorporateMortgage-backedAsset-backedState and MunicipalTotalForeign GovernmentCorporateMortgage-backedAsset-backedState and MunicipalTotal
Balance, beginning of period$19,469 $— $1,140 $889 $339 $21,837 $33,052 $8,867 $885 $1,444 $— $44,248 
Change on securities for which credit losses were not previously recorded47 — — — — 47 — 756 905 — 821 2,482 
Change on securities for which credit losses were previously recorded(12,782)— (1,088)(343)(339)(14,552)3,119 (3,853)310 58 — (366)
Reduction due to disposals(379)— — — — (379)— — — — — — 
Balance, end of period$6,355 $— $52 $546 $— $6,953 $36,171 $5,770 $2,100 $1,502 $821 $46,364 
During the three months ended September 30, 2024, the Company decreased the allowance for expected credit losses for available for sale securities utilizing its credit loss assessment process and inputs used in its credit loss model, primarily due to improved pricing associated with foreign government securities.
The amortized cost and fair value of fixed maturity securities at September 30, 2024, by contractual maturity, are shown below. Actual maturities may differ from contractual maturities because certain issuers may have the right to call or prepay obligations.
(In thousands)Amortized
Cost (1)
Fair
Value
Due in one year or less$1,910,941 $1,886,626 
Due after one year through five years9,907,127 9,724,883 
Due after five years through ten years4,282,838 4,283,690 
Due after ten years3,562,724 3,530,253 
Mortgage-backed securities3,339,488 3,240,479 
Total$23,003,118 $22,665,931 
_______________
(1) Amortized cost is reduced by the allowance for expected credit losses of $30 thousand related to held to maturity securities.    
At September 30, 2024 and December 31, 2023, there were no investments that exceeded 10% of common stockholders' equity, other than investments in United States government and government agency securities.