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v3.23.2

Investments - Securities In Unrealized Loss Position (Details) $ in Thousands | Jun. 30, 2023 USD ($) security | Dec. 31, 2022 USD ($) security
--- | --- | ---
Schedule of Investments [Line Items] |  |
Less Than 12 Months - Fair Value | $ 1,576,386 | $ 3,411,256
12 Months or Greater - Fair Value | 3,640,778 | 1,592,040
Total - Fair Value | 5,217,164 | 5,003,296
Less Than 12 Months - Unrealized Losses | (29,572) | (298,637)
12 Months or Greater - Unrealized Losses | (428,791) | (224,403)
Total - Unrealized Losses | $ (458,363) | $ (523,040)
Number of securities in unrealized loss position (in securities) | security | 1,223 | 1,226
U.S. Treasury securities and obligations of U.S. government corporations and agencies |  |
Schedule of Investments [Line Items] |  |
Less Than 12 Months - Fair Value | $ 76,161 | $ 67,531
12 Months or Greater - Fair Value | 93,067 | 76,246
Total - Fair Value | 169,228 | 143,777
Less Than 12 Months - Unrealized Losses | (1,394) | (3,583)
12 Months or Greater - Unrealized Losses | (7,477) | (6,100)
Total - Unrealized Losses | (8,871) | (9,683)
Obligations of U.S. states and political subdivisions |  |
Schedule of Investments [Line Items] |  |
Less Than 12 Months - Fair Value | 586,294 | 1,344,272
12 Months or Greater - Fair Value | 1,077,509 | 360,956
Total - Fair Value | 1,663,803 | 1,705,228
Less Than 12 Months - Unrealized Losses | (10,085) | (157,903)
12 Months or Greater - Unrealized Losses | (204,703) | (98,170)
Total - Unrealized Losses | (214,788) | (256,073)
Corporate debt securities |  |
Schedule of Investments [Line Items] |  |
Less Than 12 Months - Fair Value | 754,768 | 1,488,255
12 Months or Greater - Fair Value | 1,639,146 | 758,732
Total - Fair Value | 2,393,914 | 2,246,987
Less Than 12 Months - Unrealized Losses | (15,548) | (109,976)
12 Months or Greater - Unrealized Losses | (162,551) | (86,401)
Total - Unrealized Losses | (178,099) | (196,377)
ABS |  |
Schedule of Investments [Line Items] |  |
Less Than 12 Months - Fair Value | 47,890 | 53,201
12 Months or Greater - Fair Value | 74,887 | 67,073
Total - Fair Value | 122,777 | 120,274
Less Than 12 Months - Unrealized Losses | (622) | (1,008)
12 Months or Greater - Unrealized Losses | (4,569) | (5,033)
Total - Unrealized Losses | (5,191) | (6,041)
RMBS |  |
Schedule of Investments [Line Items] |  |
Less Than 12 Months - Fair Value | 70,138 | 77,563
12 Months or Greater - Fair Value | 182,408 | 136,179
Total - Fair Value | 252,546 | 213,742
Less Than 12 Months - Unrealized Losses | (1,082) | (8,572)
12 Months or Greater - Unrealized Losses | (22,501) | (17,172)
Total - Unrealized Losses | (23,583) | (25,744)
CMBS |  |
Schedule of Investments [Line Items] |  |
Less Than 12 Months - Fair Value | 37,158 | 166,973
12 Months or Greater - Fair Value | 243,457 | 70,792
Total - Fair Value | 280,615 | 237,765
Less Than 12 Months - Unrealized Losses | (818) | (12,951)
12 Months or Greater - Unrealized Losses | (21,334) | (7,640)
Total - Unrealized Losses | (22,152) | (20,591)
CLOs |  |
Schedule of Investments [Line Items] |  |
Less Than 12 Months - Fair Value | 3,977 | 213,461
12 Months or Greater - Fair Value | 324,562 | 114,459
Total - Fair Value | 328,539 | 327,920
Less Than 12 Months - Unrealized Losses | (23) | (4,644)
12 Months or Greater - Unrealized Losses | (4,912) | (3,185)
Total - Unrealized Losses | (4,935) | (7,829)
Foreign government debt |  |
Schedule of Investments [Line Items] |  |
Less Than 12 Months - Fair Value | 0 | 0
12 Months or Greater - Fair Value | 3,743 | 3,787
Total - Fair Value | 3,743 | 3,787
Less Than 12 Months - Unrealized Losses | 0 | 0
12 Months or Greater - Unrealized Losses | (743) | (699)
Total - Unrealized Losses | (743) | (699)
Commercial paper |  |
Schedule of Investments [Line Items] |  |
Less Than 12 Months - Fair Value | 0 | 0
12 Months or Greater - Fair Value | 1,999 | 3,816
Total - Fair Value | 1,999 | 3,816
Less Than 12 Months - Unrealized Losses | 0 | 0
12 Months or Greater - Unrealized Losses | (1) | (3)
Total - Unrealized Losses | $ (1) | $ (3)

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