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FAIR VALUE - (Detail Textuals)
 3 Months Ended
Mar. 31, 2015
Property
Asset
Loan
Schedule of Available-for-sale Securities [Line Items]  
Number of assets valued at quoted price 2glbz_NumberOfAssetsValuedAtQuotedPrice
Number of impaired loans classified as nonaccrual loans 32glbz_ImpairedLoansClassifiedAsNonaccrualNumberOfLoan
Number of properties classified as OREO 1glbz_NumberOfOtherRealEstateOwnedAssets
Corporate Debt Securities  
Schedule of Available-for-sale Securities [Line Items]  
Number of pooled trust preferred security 1glbz_NumberOfPreferredSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateDebtSecuritiesMember
Assumed future inputs net default basis points rate This testing assumed future defaults on the currently performing financial institutions of 150 basis points applied annually with a 0% recovery on both current and future defaulting financial institutions.
Investment securities  
Schedule of Available-for-sale Securities [Line Items]  
Number of securities continuous unrealized loss position more than twelve months 24glbz_NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonths
/ us-gaap_InvestmentTypeAxis
= us-gaap_SecuritiesInvestmentMember