Fair Value (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of Financial Instruments Measured at Fair Value on a Recurring Basis

The following table presents the financial instruments measured on a recurring basis at fair value at December 31, 2023 and 2022:

	2023
($ in thousands)	Level 1		Level 2		Level 3		Total
Fixed maturities:
U.S. government treasuries	$	—	$	708,250	$	—	$	708,250
U.S. states, territories and municipalities	—		4,370		—		4,370
Non-U.S. sovereign governments and supranationals	—		56,246		—		56,246
Corporate	—		863,876		—		863,876
Residential mortgage-backed securities - Agency	—		168,513		—		168,513
Residential mortgage-backed securities - Non-agency	—		4,984		—		4,984
Commercial mortgage-backed securities - Non-agency	—		10,423		—		10,423
Other asset-backed securities	—		14,606		—		14,606
Total fixed maturities	—		1,831,268		—		1,831,268
Short-term investments	—		428,878		—		428,878
Total	$	—	$	2,260,146	$	—	$	2,260,146

	2022
($ in thousands)	Level 1		Level 2		Level 3		Total
Fixed maturities:
U.S. government treasuries	$	—	$	471,851	$	—	$	471,851
U.S. states, territories and municipalities	—		4,307		—		4,307
Non-U.S. sovereign governments and supranationals	—		12,952		—		12,952
Corporate	—		647,477		—		647,477
Residential mortgage-backed securities - Agency	—		96,410		—		96,410
Residential mortgage-backed securities - Non-agency	—		4,375		—		4,375
Commercial mortgage-backed securities - Non-agency	—		9,219		—		9,219
Other asset-backed securities	—		12,885		—		12,885
Total fixed maturities	—		1,259,476		—		1,259,476
Short-term investments	—		286,111		—		286,111
Total	$	—	$	1,545,587	$	—	$	1,545,587