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INVESTMENTS - Gross Unrealized Losses (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Fair value |  |
12 months or greater | $ 1,806,373 | $ 2,253,146
Less than 12 months | 3,443,339 | 4,880,934
Total | 5,249,712 | 7,134,080
Unrealized losses |  |
12 months or greater | (133,042) | (185,909)
Less than 12 months | (74,722) | (125,426)
Total | (207,764) | (311,335)
U.S. government and agency |  |
Fair value |  |
12 months or greater | 205,838 | 262,368
Less than 12 months | 375,531 | 1,026,139
Total | 581,369 | 1,288,507
Unrealized losses |  |
12 months or greater | (9,688) | (17,515)
Less than 12 months | (2,383) | (15,621)
Total | (12,071) | (33,136)
Non-U.S. government |  |
Fair value |  |
12 months or greater | 72,109 | 98,846
Less than 12 months | 225,680 | 457,889
Total | 297,789 | 556,735
Unrealized losses |  |
12 months or greater | (5,984) | (9,179)
Less than 12 months | (6,591) | (16,781)
Total | (12,575) | (25,960)
Corporate debt |  |
Fair value |  |
12 months or greater | 738,285 | 934,975
Less than 12 months | 1,614,646 | 2,032,254
Total | 2,352,931 | 2,967,229
Unrealized losses |  |
12 months or greater | (57,868) | (78,979)
Less than 12 months | (39,791) | (47,245)
Total | (97,659) | (126,224)
Agency RMBS |  |
Fair value |  |
12 months or greater | 255,353 | 280,550
Less than 12 months | 573,326 | 749,040
Total | 828,679 | 1,029,590
Unrealized losses |  |
12 months or greater | (27,160) | (35,333)
Less than 12 months | (15,577) | (26,657)
Total | (42,737) | (61,990)
CMBS |  |
Fair value |  |
12 months or greater | 328,574 | 410,213
Less than 12 months | 231,417 | 260,411
Total | 559,991 | 670,624
Unrealized losses |  |
12 months or greater | (17,768) | (22,334)
Less than 12 months | (8,475) | (11,836)
Total | (26,243) | (34,170)
Non-agency RMBS |  |
Fair value |  |
12 months or greater | 48,450 | 69,418
Less than 12 months | 52,389 | 8,302
Total | 100,839 | 77,720
Unrealized losses |  |
12 months or greater | (5,905) | (9,900)
Less than 12 months | (111) | (82)
Total | (6,016) | (9,982)
ABS |  |
Fair value |  |
12 months or greater | 122,630 | 147,281
Less than 12 months | 361,590 | 295,897
Total | 484,221 | 443,178
Unrealized losses |  |
12 months or greater | (6,532) | (8,471)
Less than 12 months | (1,589) | (4,806)
Total | (8,121) | (13,277)
Municipals |  |
Fair value |  |
12 months or greater | 35,134 | 49,495
Less than 12 months | 8,760 | 51,002
Total | 43,893 | 100,497
Unrealized losses |  |
12 months or greater | (2,137) | (4,198)
Less than 12 months | (205) | (2,398)
Total | $ (2,342) | $ (6,596)

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