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Fair Value Measurements (Detail Textuals)	12 Months Ended
	Dec. 31, 2015 USD ($) Loan Property
Fair Value Disclosures [Abstract]
Number of loans consisted under non-recurring assets	28
Number of impaired loans classified as nonaccrual loans	11
Number of impaired loans classified as accruing loans	17
Number of properties classified as OREO | Property	2
Valuation allowance allocation to the impaired loans | $	$ 1,103,686

X

- Definition

Number of loan classified as impaired and accruing loans as on the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	glbz_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of loan classified as impaired and non accrual as on the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	glbz_
Data Type:	xbrli:integerItemType
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

Number Of Other Real Estate Owned Assets.

+ References

No definition available.

+ Details

Name:	glbz_NumberOfOtherRealEstateOwnedAssets
Namespace Prefix:	glbz_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant