XML 46 R36.htm IDEA: XBRL DOCUMENT
v3.25.3

LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Troubled debt restructured loans (Details) $ in Thousands | Sep. 30, 2025 USD ($) loan | Dec. 31, 2024 USD ($)
--- | --- | ---
Impaired Financing Receivables |  |
Restructured loans to borrowers with financial difficulty | $ 114 | $ 26
Non-accrual and 90+ days past due and still accruing loans to average loans | 0.56% | 0.19%
Allowance for credit losses to nonaccrual & 90+ days past due and still accruing loans | 213.90% | 789.10%
Real Estate Loan |  |
Impaired Financing Receivables |  |
Number of loans | loan | 2 |
Real Estate Loan | Single-family residential |  |
Impaired Financing Receivables |  |
Restructured loans to borrowers with financial difficulty | $ 23 | $ 26
Number of loans | loan | 1 |
Troubled debt restructured loans | $ 23,000 |
Real Estate Loan | Commercial |  |
Impaired Financing Receivables |  |
Restructured loans to borrowers with financial difficulty | $ 91 |
Number of loans | loan | 1 |
Troubled debt restructured loans | $ 91,000 |

X
- Definition Represents Allowance for credit losses to non-accrual and 90 days or more and still accruing loans. + References No definition available. + Details
Name: | glbz_AllowanceForCreditLossesToNonAccrualAnd90DaysOrMoreAndStillAccruingLoans
Namespace Prefix: | glbz_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents Non-accrual and 90 days or more and still accruing loans to gross loans. + References No definition available. + Details
Name: | glbz_NonAccrualAnd90DaysOrMoreAndStillAccruingLoansToGrossLoans
Namespace Prefix: | glbz_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents number of loans. + References No definition available. + Details
Name: | glbz_NumberOfLoans
Namespace Prefix: | glbz_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition represents Troubled debt restructured loans. + References No definition available. + Details
Name: | glbz_TroubledDebtRestructuredLoans
Namespace Prefix: | glbz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_FinancingReceivableImpairedLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated amortized cost of financing receivable modified for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-33 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481746/310-40-50-4 + Details
Name: | us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_RealEstateLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_SingleFamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |