XML 50 R39.htm IDEA: XBRL DOCUMENT
v3.20.2

Redomestication - Additional Information (Detail) - shares | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2020 | Aug. 27, 2020 | Dec. 31, 2019
Redomestication [Line Items] |  |  |
Redomestication close | Aug. 28, 2020 |  |
Description of business combination consideration | consideration of the Amalgamation, the Company issued an equal number of its common shares to Global Indemnity Limited shareholders at the record time of 5:00 p.m. Eastern Time on August 27, 2020 (the "Scheme Record Time"), on the following basis: for each Global Indemnity Limited A ordinary share cancelled, one class A common share of the Company was issued; and for each Global Indemnity Limited B ordinary share cancelled, one class B common share of the Company was issued |  |
Date of issuance of common shares for consideration of amalgamation | Aug. 27, 2020 |  |
Scheme meeting and extraordinary general meeting date | Aug. 25, 2020 |  |
Order granted date for terms and conditions of issuance of securities | Aug. 26, 2020 |  |
Class A Common Shares |  |  |
Redomestication [Line Items] |  |  |
Number of common shares issued for each ordinary shares | 1 |  |
Class B Common Shares |  |  |
Redomestication [Line Items] |  |  |
Number of common shares issued for each ordinary shares | 1 |  |
Series A Cumulative Fixed Rate Preferred Shares |  |  |
Redomestication [Line Items] |  |  |
Preferred shares, shares issued | 4,000 | 4,000 | 0

X
- Definition Date of issuance of common shares for consideration of amalgamation. + References No definition available. + Details
Name: | gbli_DateOfIssuanceOfCommonSharesForConsiderationOfAmalgamation
Namespace Prefix: | gbli_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of business combination consideration. + References No definition available. + Details
Name: | gbli_DescriptionOfBusinessCombinationConsideration
Namespace Prefix: | gbli_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of common shares issued for each ordinary shares. + References No definition available. + Details
Name: | gbli_NumberOfCommonSharesIssuedForEachOrdinaryShares
Namespace Prefix: | gbli_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Order granted date for terms and conditions of issuance of securities. + References No definition available. + Details
Name: | gbli_OrderGrantedDateForTermsAndConditionsOfIssuanceOfSecurities
Namespace Prefix: | gbli_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Redomestication close. + References No definition available. + Details
Name: | gbli_RedomesticationClose
Namespace Prefix: | gbli_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Redomestication line items. + References No definition available. + Details
Name: | gbli_RedomesticationLineItems
Namespace Prefix: | gbli_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Scheme meeting and extraordinary general meeting date. + References No definition available. + Details
Name: | gbli_SchemeMeetingAndExtraordinaryGeneralMeetingDate
Namespace Prefix: | gbli_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=gbli_SeriesACumulativeFixedRatePreferredSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |