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v3.20.1

Loans and Allowance - Summary of allowance for credit losses (Details) - USD ($) | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |
Troubled debt restructured loans | $ 40,000 | $ 41,000
Non-accrual and 90+ days past due and still accruing loans to average loans | 1.46% | 1.45%
Allowance for credit losses to non-accrual and 90 days or more and still accruing loans | 46.70% | 49.80%
Consumer |  |
Financing Receivable, Impaired [Line Items] |  |
Troubled debt restructured loans | $ 40,000 |

X
- Definition Represents Allowance for credit losses to non-accrual and 90 days or more and still accruing loans. + References No definition available. + Details
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Namespace Prefix: | glbz_
Data Type: | num: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
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- Definition represents Troubled debt restructured loans. + References No definition available. + Details
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Balance Type: | credit
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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
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |