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Stockholders' Equity - Summary of capital comparison with minimum requirements (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Company
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets) Actual Amount	$ 36,959,000us-gaap_Capital / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	$ 35,933,000us-gaap_Capital / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	$ 34,165,000us-gaap_Capital / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember
Total Capital (to Risk Weighted Assets) Actual Ratio	14.30%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	14.10%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	14.10%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount	20,645,810us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	20,329,844us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	19,425,729us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio	8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio
Tier I Capital (to Risk Weighted Assets) Actual Amount	33,728,000us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	32,761,000us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	31,124,000us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember
Tier I Capital (to Risk Weighted Assets) Actual Ratio	13.10%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	12.90%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	12.80%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount	10,322,265us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	10,166,330us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	9,711,076us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio	4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember
Tier I Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount
Tier I Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio
Tier I Capital (to Average Assets) Actual Amount	33,728,000us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	32,761,000us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	31,124,000us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember
Tier I Capital (to Average Assets) Actual Ratio	8.50%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	8.70%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	8.30%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Amount	15,834,742us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	15,079,862us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	15,072,155us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Ratio	4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember	4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = glbz_GlenBurnieBancorpMember
Tier I Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount
Tier I Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets) Actual Amount	36,655,000us-gaap_Capital / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	35,933,000us-gaap_Capital / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	33,807,000us-gaap_Capital / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Total Capital (to Risk Weighted Assets) Actual Ratio	14.30%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	14.10%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	14.00%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount	20,477,654us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	20,183,569us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	19,290,728us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio	8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	25,597,067us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	25,229,462us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	24,113,409us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Tier I Capital (to Risk Weighted Assets) Actual Amount	33,454,000us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	32,470,000us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	30,787,000us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Tier I Capital (to Risk Weighted Assets) Actual Ratio	13.10%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	12.90%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	12.80%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount	10,238,409us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	10,091,686us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	9,643,540us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio	4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Tier I Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	15,357,613us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	15,137,529us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	14,465,309us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Tier I Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Tier I Capital (to Average Assets) Actual Amount	33,454,000us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	32,470,000us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	30,787,000us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Tier I Capital (to Average Assets) Actual Ratio	8.40%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	8.60%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	8.10%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Amount	16,006,699us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	15,119,907us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	15,297,888us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Ratio	4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Tier I Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 20,008,373us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	$ 18,899,884us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	$ 19,122,360us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember
Tier I Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember	5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = glbz_BankOfGlenBurnieMember

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The amount of total capital as defined in the regulations.

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The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action.

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The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action.

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Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital.

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