Segments - Schedule of Premiums Written (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Effects of Reinsurance [Line Items]
Total gross written premiums	$ 667,704	$ 535,326
Skyward Specialty Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	581,804	535,326
Apollo Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	85,900	0
Operating Segments \| Skyward Specialty Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	580,891	532,921
Corporate Nonsegment \| Skyward Specialty Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	913	2,405
Accident & Health \| Operating Segments \| Skyward Specialty Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	92,009	63,169
Captives \| Operating Segments \| Skyward Specialty Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	57,914	66,929
Credit & Surety \| Operating Segments \| Skyward Specialty Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	64,174	45,028
Energy Solutions \| Operating Segments \| Skyward Specialty Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	48,866	75,594
Global Agriculture \| Operating Segments \| Skyward Specialty Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	102,352	80,617
Global Property \| Operating Segments \| Skyward Specialty Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	34,517	46,686
Professional Lines \| Operating Segments \| Skyward Specialty Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	36,228	40,217
Specialty Programs \| Operating Segments \| Skyward Specialty Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	94,767	62,675
Transactional E&S \| Operating Segments \| Skyward Specialty Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	50,064	52,006
Syndicate 1969 \| Apollo Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	65,008	0
Syndicate 1971 \| Apollo Segment
Effects of Reinsurance [Line Items]
Total gross written premiums	$ 20,892	$ 0