XML 39 R52.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Investment Securities - Additional Information (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Investments, Debt and Equity Securities [Abstract] |  |  |
Proceeds from sales of available for sale securities | $ 30,269,965us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds | $ 25,626,845us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds | $ 18,656,622us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds
Realized gain on sale | 1,210,332us-gaap_AvailableForSaleSecuritiesGrossRealizedGains | 664,269us-gaap_AvailableForSaleSecuritiesGrossRealizedGains | 282,069us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Realized loss on sale | 54,354us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses | 318,938us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses | 119,475us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Income tax expense relating to net gains on sales of investment securities | 455,976glbz_AvailableForSaleSecuritiesIncomeTaxExpenseRelatingToNetGainsOnSales | 136,216glbz_AvailableForSaleSecuritiesIncomeTaxExpenseRelatingToNetGainsOnSales | 64,135glbz_AvailableForSaleSecuritiesIncomeTaxExpenseRelatingToNetGainsOnSales
Schedule of Available-for-sale Securities [Line Items] |  |  |
Write-down of investment |  | 15,581us-gaap_ImpairmentOfInvestments |
Securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Number of securities continuous unrealized loss position more than twelve months | 27glbz_NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonths / us-gaap_InvestmentTypeAxis = us-gaap_SecuritiesInvestmentMember |  |
Corporate Trust Preferred |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Write-down of investment |  | $ 15,581us-gaap_ImpairmentOfInvestments / 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. |  |

X
- Definition Assumed Future Inputs Net Default Basis Points Rate + References No definition available. + Details
Name: | glbz_AssumedFutureInputsNetDefaultBasisPointsRate
Namespace Prefix: | glbz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Available for sale securities income tax expense relating to Net gains on sales + References No definition available. + Details
Name: | glbz_AvailableForSaleSecuritiesIncomeTaxExpenseRelatingToNetGainsOnSales
Namespace Prefix: | glbz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months + References No definition available. + Details
Name: | glbz_NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonths
Namespace Prefix: | glbz_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: 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 + Details
Name: | us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The total amount of proceeds received for the sale of securities, categorized neither as held-to-maturity nor trading securities, during the reporting period. + References Reference 1: 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 + Details
Name: | us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: 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 + Details
Name: | us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 35 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e25351-111560 + Details
Name: | us-gaap_ImpairmentOfInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_SecuritiesInvestmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |