v3.26.1
Investments - Schedule of Aging of Unrealized Losses (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
security
Dec. 31, 2025
USD ($)
security
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 172 34
Fair value, less than 12 months $ 1,090,829 $ 333,331
Unrealized losses, less than 12 months $ (13,851) $ (1,984)
Number of securities,12 months or greater | security 358 395
Fair value, 12 months or greater $ 1,187,825 $ 1,351,427
Unrealized loss position, 12 months or greater $ (85,255) $ (84,292)
Number of securities, total | security 530 429
Fair Value $ 2,278,654 $ 1,684,758
Unrealized Losses $ (99,106) $ (86,276)
U.S. Treasury securities and obligations of U.S. government agencies    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 18 11
Fair value, less than 12 months $ 192,601 $ 204,062
Unrealized losses, less than 12 months $ (5,474) $ (1,673)
Number of securities,12 months or greater | security 1 5
Fair value, 12 months or greater $ 534 $ 1,993
Unrealized loss position, 12 months or greater $ (7) $ (11)
Number of securities, total | security 19 16
Fair Value $ 193,135 $ 206,055
Unrealized Losses $ (5,481) $ (1,684)
Municipal debt securities    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 6 0
Fair value, less than 12 months $ 32,254 $ 0
Unrealized losses, less than 12 months $ (98) $ 0
Number of securities,12 months or greater | security 200 215
Fair value, 12 months or greater $ 436,770 $ 477,095
Unrealized loss position, 12 months or greater $ (28,163) $ (26,879)
Number of securities, total | security 206 215
Fair Value $ 469,024 $ 477,095
Unrealized Losses $ (28,261) $ (26,879)
Corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 126 13
Fair value, less than 12 months $ 654,587 $ 43,546
Unrealized losses, less than 12 months $ (7,645) $ (209)
Number of securities,12 months or greater | security 143 159
Fair value, 12 months or greater $ 730,591 $ 836,050
Unrealized loss position, 12 months or greater $ (54,156) $ (54,806)
Number of securities, total | security 269 172
Fair Value $ 1,385,178 $ 879,596
Unrealized Losses $ (61,801) $ (55,015)
U.S. agency mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 3 2
Fair value, less than 12 months $ 38,907 $ 27,109
Unrealized losses, less than 12 months $ (492) $ (48)
Number of securities,12 months or greater | security 0 0
Fair value, 12 months or greater $ 0 $ 0
Unrealized loss position, 12 months or greater $ 0 $ 0
Number of securities, total | security 3 2
Fair Value $ 38,907 $ 27,109
Unrealized Losses $ (492) $ (48)
Other asset-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 12 7
Fair value, less than 12 months $ 83,725 $ 33,836
Unrealized losses, less than 12 months $ (104) $ (53)
Number of securities,12 months or greater | security 14 16
Fair value, 12 months or greater $ 19,930 $ 36,289
Unrealized loss position, 12 months or greater $ (2,929) $ (2,596)
Number of securities, total | security 26 23
Fair Value $ 103,655 $ 70,125
Unrealized Losses $ (3,033) $ (2,649)
Short-term investments    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 7 1
Fair value, less than 12 months $ 88,755 $ 24,778
Unrealized losses, less than 12 months $ (38) $ (1)
Number of securities,12 months or greater | security 0 0
Fair value, 12 months or greater $ 0 $ 0
Unrealized loss position, 12 months or greater $ 0 $ 0
Number of securities, total | security 7 1
Fair Value $ 88,755 $ 24,778
Unrealized Losses $ (38) $ (1)