v3.26.1
Investments - Contractual Maturities (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Amortized Cost    
Less: loaned securities $ 98,612 $ 141,878
Investment, Type [Extensible Enumeration] Fixed Maturities [Member]  
Total fixed-maturities available for sale, Amortized Cost $ 6,610,659 4,550,954
Fair Value    
Less: loaned securities 98,612 141,878
Total fixed-maturities available for sale, Fair Value 6,282,511 4,271,916
Non asset-backed securities    
Amortized Cost    
Due in one year or less 280,621  
Due after one year through five years [1] 1,969,155  
Due after five years through 10 years [1] 825,302  
Due after 10 years [1] 862,652  
Fair Value    
Due in one year or less 279,182  
Due after one year through five years [1] 1,933,649  
Due after five years through 10 years [1] 801,908  
Due after 10 years [1] 666,348  
Asset-backed and mortgage-backed securities    
Amortized Cost    
Asset-backed and mortgage-backed securities [2] 2,744,040  
Fair Value    
Asset-backed and mortgage-backed securities [2] 2,667,836  
Total fixed-maturities available for sale    
Amortized Cost    
Total 6,681,770 4,607,615
Total fixed-maturities available for sale, Amortized Cost 6,610,659 4,550,954
Fair Value    
Total 6,348,923 4,326,071
Total fixed-maturities available for sale, Fair Value 6,282,511 4,271,916
Loaned securities, amortized cost | Total fixed-maturities available for sale    
Amortized Cost    
Less: loaned securities [3] 71,111 56,661
Fair Value    
Less: loaned securities [3] 71,111 56,661
Loaned securities, fair value | Total fixed-maturities available for sale    
Amortized Cost    
Less: loaned securities [3] 66,412 54,155
Fair Value    
Less: loaned securities [3] $ 66,412 $ 54,155
[1] Actual maturities may differ as a result of calls before scheduled maturity.
[2] Includes RMBS, CMBS, CLO, Other ABS and mortgage insurance-linked notes, which are not due at a single maturity date.
[3] Included in other assets on our condensed consolidated balance sheets. See “Loaned Securities” below for a discussion of our securities lending agreements.