Related Party Transactions - Additional Information (Detail) - USD ($)		1 Months Ended	12 Months Ended
	Aug. 27, 2020	May 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Sep. 04, 2020	Dec. 31, 2019
Series A Preferred Interest
Related Party Transaction [Line Items]
Preferred shares issued	4,000
Shares issued, price per share	$ 1,000
Preferred shares issued	$ 4,000,000
Preferred interests, non-voting description			While these preferred interests are non-voting, the preferred shareholders are entitled to appoint two additional members to Global Indemnity Group, LLC’s Board of Directors whenever the “Unpaid Targeted Priority Return” with respect to the preferred interests exceed zero immediately following six or more “Distribution Dates”, whether or not such Distribution Dates occur consecutively.
Fox Paine Entities
Related Party Transaction [Line Items]
Company's total voting power			82.90%
Wyncote LLC | Series A Preferred Interest
Related Party Transaction [Line Items]
Preferred shares issued	4,000
Shares issued, price per share	$ 1,000
Preferred shares issued	$ 4,000,000
Fox Paine and Company
Related Party Transaction [Line Items]
Restated management agreement date			Aug. 28, 2020
Annual service fee					$ 2,600,000
Management fees			$ 2,700,000	$ 2,600,000		$ 2,100,000
Prepaid management fees			$ 1,900,000	1,800,000
Advisory services fees paid		$ 2,000,000.0		10,000,000.0
Advisory services fees, accrued				10,000,000.0
Advisory services fees approved by conflicts committee				$ 10,000,000.0