XML 36 R52.htm IDEA: XBRL DOCUMENT v3.2.0.727

Components of Net Realized Investment Gains (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Total net realized investment gains (losses)	$ 6,532	$ 39,881	$ 3,562	$ 39,068
Not Designated as Hedging Instrument | Interest Rate Swap
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	6,353		1,873
Gross realized losses	(1,296)	(6,018)	(2,698)	(12,360)
Total net realized investment gains (losses)	5,057	(6,018)	(825)	(12,360)
Fixed Maturities
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	746	719	1,479	2,389
Gross realized losses	(110)	(96)	(241)	(226)
Total net realized investment gains (losses)	636	623	1,238	2,163
Common Shares
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	3,371	45,868	5,923	49,875
Gross realized losses	(2,532)	(592)	(2,870)	(610)
Total net realized investment gains (losses)	$ 839	$ 45,276	3,053	$ 49,265
Preferred Stock
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains			96
Total net realized investment gains (losses)			$ 96

X

- Definition

Marketable Securities Gross Realized Gain

+ References

No definition available.

+ Details

Name:	gbli_MarketableSecuritiesGrossRealizedGain
Namespace Prefix:	gbli_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Marketable Securities Gross Realized Losses

+ References

No definition available.

+ Details

Name:	gbli_MarketableSecuritiesGrossRealizedLosses
Namespace Prefix:	gbli_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

This item represents the total realized gain (loss) included in earnings for the period as a result of selling marketable securities categorized as trading, available-for-sale, or held-to-maturity. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 225



-SubTopic 10



-Section S99



-Paragraph 2



-Subparagraph (SX 210.5-03.7(c))



-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 320



-SubTopic 10



-Section 50



-Paragraph 9



-Subparagraph (a)



-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 320



-SubTopic 10



-Section 50



-Paragraph 10



-Subparagraph (c)



-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563

+ Details

Name:	us-gaap_MarketableSecuritiesRealizedGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_FixedMaturitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_PreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: