XML 74 R61.htm IDEA: XBRL DOCUMENT v3.25.0.1

Principles of Consolidation and Basis of Presentation - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2024
Organization And Basis Of Presentation [Line Items]
State of incorporation	DE
Kind of listing	class A common shares

X

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:	dei_EntityIncorporationStateCountryCode
Namespace Prefix:	dei_
Data Type:	dei:edgarStateCountryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Description of the kind of listing the entity has on the exchange, if necessary to further describe different instruments that are already distinguished by Entity, Exchange and Security.

+ References

No definition available.

+ Details

Name:	dei_EntityListingDescription
Namespace Prefix:	dei_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Organization and basis of presentation.

+ References

No definition available.

+ Details

Name:	gbli_OrganizationAndBasisOfPresentationLineItems
Namespace Prefix:	gbli_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration