v3.26.3
Fair Value (Tables)
 9 Months Ended
Sep. 30, 2026
Fair Value Disclosures [Abstract]  
Schedule of Financial Instruments Measured at Fair Value on a Recurring Basis
The following table presents the financial instruments measured at fair value on a recurring basis:

September 30, 2026
($ in thousands)
Level 1Level 2Level 3Total
Fixed maturities:
U.S. government treasuries$— $350,678 $— $350,678 
U.S. states, territories and municipalities— 9,239 — 9,239 
Non-U.S. sovereign governments and supranationals— 92,350 — 92,350 
Corporate— 1,829,404 — 1,829,404 
Residential mortgage-backed securities - Agency— 346,377 — 346,377 
Residential mortgage-backed securities - Non-agency— 96,434 — 96,434 
Commercial mortgage-backed securities - Non-agency— 84,482 — 84,482 
Other asset-backed securities— 348,961 — 348,961 
Total fixed maturities— 3,157,925 — 3,157,925 
Short-term investments— 424,046 — 424,046 
Total$— $3,581,971 $— $3,581,971 

December 31, 2025
($ in thousands)
Level 1Level 2Level 3Total
Fixed maturities:
U.S. government treasuries$— $797,834 $— $797,834 
U.S. states, territories and municipalities— 12,960 — 12,960 
Non-U.S. sovereign governments and supranationals— 110,861 — 110,861 
Corporate— 1,584,144 — 1,584,144 
Residential mortgage-backed securities - Agency— 365,650 — 365,650 
Residential mortgage-backed securities - Non-agency— 32,545 — 32,545 
Commercial mortgage-backed securities - Non-agency— 94,698 — 94,698 
Other asset-backed securities— 239,851 — 239,851 
Total fixed maturities— 3,238,543 — 3,238,543 
Short-term investments— 200,459 — 200,459 
Total$— $3,439,002 $— $3,439,002