XML 49 R45.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Municipal Bonds with and without Insurance (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014
--- | ---
Financial Statement Details [Line Items] |
Ratings with insurance | $ 3,558
Ratings without insurance | 3,558
AAA Rating |
Financial Statement Details [Line Items] |
Ratings with insurance | 1,258
AA Rating |
Financial Statement Details [Line Items] |
Ratings without insurance | 1,258
A Rating |
Financial Statement Details [Line Items] |
Ratings with insurance | 2,300
Ratings without insurance | $ 2,300

X
- Details
Name: | gbli_FinancialStatementDetailsLineItems
Namespace Prefix: | gbli_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Municipal Bonds Ratings With Insurance + References No definition available. + Details
Name: | gbli_MunicipalBondsRatingsWithInsurance
Namespace Prefix: | gbli_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Municipal Bonds Ratings Without Insurance + References No definition available. + Details
Name: | gbli_MunicipalBondsRatingsWithoutInsurance
Namespace Prefix: | gbli_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant