v3.25.2
Fair value - Schedule of Additional Information about Fair Value Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Beginning Balance $ 279,704 $ 334,944 $ 281,541 $ 331,484  
Total realized and unrealized gains (losses) included in net income (1,005) (334) (763) (326)  
Total realized and unrealized gains (losses) included in OCI 3,828 (1,484) 7,191 (4,007)  
Purchases 90 18,999 2,876 22,934  
Sales (17) (1,748) (17) (1,748)  
Settlements (4,108) (13,377) (12,436) (13,900)  
Transfer into Level 3 0 0 100 4,651  
Transfer out of Level 3 (22,382) (3,592) (22,382) (5,680)  
Ending Balance 256,110 333,408 256,110 333,408  
Total gains (losses) attributable to assets still held included in net income (1,001) 11 (759) 19  
Total gains (losses) attributable to assets still held included in OCI 3,452 (1,710) 6,807 (4,258)  
Fixed maturity securities available-for-sale, at fair value (amortized cost of $6,012,143 and $5,876,502 as of June 30, 2025, and December 31, 2024, respectively) 5,896,818   5,896,818   $ 5,624,773
Commercial mortgage-backed          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Fixed maturity securities available-for-sale, at fair value (amortized cost of $6,012,143 and $5,876,502 as of June 30, 2025, and December 31, 2024, respectively) 48,809   48,809    
Fair value, recurring          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Fixed maturity securities available-for-sale, at fair value (amortized cost of $6,012,143 and $5,876,502 as of June 30, 2025, and December 31, 2024, respectively) 5,896,818   5,896,818   $ 5,624,773
Fair value, recurring | Commercial mortgage-backed          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Fixed maturity securities available-for-sale, at fair value (amortized cost of $6,012,143 and $5,876,502 as of June 30, 2025, and December 31, 2024, respectively) 48,809   48,809    
U.S. corporate          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Beginning Balance 225,970 249,599 222,786 247,205  
Total realized and unrealized gains (losses) included in net income 245 (352) 484 (359)  
Total realized and unrealized gains (losses) included in OCI 3,081 (60) 6,248 (1,952)  
Purchases 0 0 0 0  
Sales 0 (1,739) 0 (1,739)  
Settlements (4,000) (10,000) (4,222) (10,358)  
Transfer into Level 3 0 0 0 4,651  
Transfer out of Level 3 (18,579) 0 (18,579) 0  
Ending Balance 206,717 237,448 206,717 237,448  
Total gains (losses) attributable to assets still held included in net income 245 (8) 484 (15)  
Total gains (losses) attributable to assets still held included in OCI 2,758 (294) 5,925 (2,186)  
Non-U.S. corporate          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Beginning Balance 50,474 80,554 56,553 81,321  
Total realized and unrealized gains (losses) included in net income (1,259) 9 (1,265) 16  
Total realized and unrealized gains (losses) included in OCI 724 (1,395) 956 (2,064)  
Purchases 90 6,000 1,890 6,000  
Sales (17) (9) (17) (9)  
Settlements (106) (3,106) (8,211) (3,211)  
Transfer into Level 3 0 0 0 0  
Transfer out of Level 3 (3,803) 0 (3,803) 0  
Ending Balance 46,103 82,053 46,103 82,053  
Total gains (losses) attributable to assets still held included in net income (1,255) 10 (1,261) 17  
Total gains (losses) attributable to assets still held included in OCI 672 (1,404) 895 (2,073)  
Other asset-backed          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Beginning Balance 3,260 4,791 2,202 2,958  
Total realized and unrealized gains (losses) included in net income 9 9 18 17  
Total realized and unrealized gains (losses) included in OCI 23 (29) (13) 9  
Purchases 0 12,999 986 16,934  
Sales 0 0 0 0  
Settlements (2) (271) (3) (331)  
Transfer into Level 3 0 0 100 0  
Transfer out of Level 3 0 (3,592) 0 (5,680)  
Ending Balance 3,290 13,907 3,290 13,907  
Total gains (losses) attributable to assets still held included in net income 9 9 18 17  
Total gains (losses) attributable to assets still held included in OCI $ 22 $ (12) $ (13) $ 1