XML 47 R38.htm IDEA: XBRL DOCUMENT
v3.23.1

FAIR VALUE - Changes in the assets subject to fair value measurements (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022
--- | --- | --- | ---
Fair Value Measurements |  |  |
Securities available for sale | $ 144,726 | $ 144,133 |
Collateralized mortgage obligations |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 14,877 | 15,255 |
Agency mortgage-backed securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 51,092 | 51,893 |
Municipal securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 33,433 | 32,297 |
Corporate securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 1,315 | 1,325 |
U.S. Treasury securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 6,830 | 6,783 |
Level 2 |  |  |
Fair Value Measurements |  |  |
Assets, fair value disclosure | 144,726 | 144,133 |
Level 3 |  |  |
Fair Value Measurements |  |  |
Assets, fair value disclosure | 433 | 330 |
Fair Value |  |  |
Fair Value Measurements |  |  |
Assets, fair value disclosure | 145,159 | 144,463 |
Recurring | Level 2 | Collateralized mortgage obligations |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 14,877 | 15,255 |
Recurring | Level 2 | Agency mortgage-backed securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 51,092 | 51,893 |
Recurring | Level 2 | Municipal securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 33,433 | 32,297 |
Recurring | Level 2 | Corporate securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 1,315 | 1,325 |
Recurring | Level 2 | U.S. Government agency securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 37,179 | 36,580 |
Recurring | Level 2 | U.S. Treasury securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 6,830 |  | $ 6,783
Recurring | Fair Value | Collateralized mortgage obligations |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 14,877 | 15,255 |
Recurring | Fair Value | Agency mortgage-backed securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 51,092 | 51,893 |
Recurring | Fair Value | Municipal securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 33,433 | 32,297 |
Recurring | Fair Value | Corporate securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 1,315 | 1,325 |
Recurring | Fair Value | U.S. Government agency securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 37,179 | 36,580 |
Recurring | Fair Value | U.S. Treasury securities |  |  |
Fair Value Measurements |  |  |
Securities available for sale | 6,830 |  | $ 6,783
Nonrecurring | Level 3 |  |  |
Fair Value Measurements |  |  |
Impaired loans | 433 | 330 |
Nonrecurring | Fair Value |  |  |
Fair Value Measurements |  |  |
Impaired loans | $ 433 | $ 330 |

X
- Definition Amount of fair value of loans and leases receivable Impaired as on the balance sheet date. + References No definition available. + Details
Name: | glbz_LoansAndLeasesReceivableImpairedAtFairValue
Namespace Prefix: | glbz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CollateralizedMortgageObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_AgencySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |