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v3.25.2

Investments - Schedule of Available for Sale (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Investments available for sale |  |
Amortized Cost | $ 6,219,151 | $ 6,231,018
Unrealized Gains | 17,592 | 4,155
Unrealized Losses | (270,206) | (358,452)
Fair Value | 5,966,537 | 5,876,721
U.S. Treasury securities |  |
Investments available for sale |  |
Amortized Cost | 398,591 | 561,853
Unrealized Gains | 1,707 | 325
Unrealized Losses | (8,837) | (14,888)
Fair Value | 391,461 | 547,290
U.S. agency mortgage-backed securities |  |
Investments available for sale |  |
Amortized Cost | 1,265,904 | 1,249,259
Unrealized Gains | 2,646 | 42
Unrealized Losses | (95,835) | (123,865)
Fair Value | 1,172,715 | 1,125,436
Municipal debt securities |  |
Investments available for sale |  |
Amortized Cost | 645,877 | 631,015
Unrealized Gains | 1,734 | 1,596
Unrealized Losses | (46,993) | (49,110)
Fair Value | 600,618 | 583,501
Non-U.S. government securities |  |
Investments available for sale |  |
Amortized Cost | 72,261 | 81,631
Unrealized Gains | 0 | 0
Unrealized Losses | (10,095) | (11,833)
Fair Value | 62,166 | 69,798
Corporate debt securities |  |
Investments available for sale |  |
Amortized Cost | 1,968,972 | 1,887,647
Unrealized Gains | 8,497 | 1,064
Unrealized Losses | (69,302) | (105,665)
Fair Value | 1,908,167 | 1,783,046
Residential and commercial mortgage securities |  |
Investments available for sale |  |
Amortized Cost | 484,715 | 519,613
Unrealized Gains | 646 | 527
Unrealized Losses | (30,980) | (42,054)
Fair Value | 454,381 | 478,086
Asset-backed securities |  |
Investments available for sale |  |
Amortized Cost | 801,867 | 642,395
Unrealized Gains | 2,362 | 601
Unrealized Losses | (8,164) | (11,037)
Fair Value | 796,065 | 631,959
Money market funds |  |
Investments available for sale |  |
Amortized Cost | 580,964 | 657,605
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Fair Value | $ 580,964 | $ 657,605

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