Represents loans and leases receivable consumer and indirect loans.

No definition available.

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Namespace Prefix:	glbz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents loans and leases receivable consumer and indirect loans

+ References

No definition available.

+ Details

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- Definition

The allowance for consumer real estate loan and lease losses represents the reserve to cover probable credit losses related to specifically identified consumer real estate loans and leases, as well as probable credit losses inherent in the remainder of the consumer real estate loan portfolio as of the balance sheet date. For banks, include currently required allocated transfer risk reserves. Include carryover of or adjustments to the allowance for consumer real estate loan losses in connection with business combinations determined to be appropriate.

+ References

No definition available.

+ Details

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- Definition

The allowance for commercial real estate loan and lease losses represents the reserve to cover probable credit losses related to specifically identified commercial real estate loans and leases, as well as probable credit losses inherent in the remainder of the commercial loan portfolio as of the balance sheet date. For banks, include currently required allocated transfer risk reserves. Include carryover of or adjustments to the allowance for commercial real estate loan losses in connection with business combinations determined to be appropriate.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Represents number of borrowers commercial real estate.

+ References

No definition available.

+ Details

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

- Definition

Represents number of borrowers consumer and indirect loans.

+ References

No definition available.

+ Details

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

- Definition

Represents number of borrowers residential real estate.

+ References

No definition available.

+ Details

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Namespace Prefix:	glbz_
Data Type:	xbrli:integerItemType
Balance Type:	na
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- Definition

Represents number of loan commercial real estate.

+ References

No definition available.

+ Details

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

- Definition

Represents number of loan consumer and indirect loans.

+ References

No definition available.

+ Details

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Namespace Prefix:	glbz_
Data Type:	xbrli:integerItemType
Balance Type:	na
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- Definition

Represents number of loan residential real estate.

+ References

No definition available.

+ Details

Name:	glbz_NumberOfLoanResidentialRealEstate
Namespace Prefix:	glbz_
Data Type:	xbrli:integerItemType
Balance Type:	na
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- Definition

Represents tolerance for actual to required reserves percentage.

+ References

No definition available.

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Balance Type:	na
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- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ 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 (c)(1)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

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

- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

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

- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Amount before allowance of consumer real estate loans. Includes, but not limited to, construction financing, residential mortgage loans, and home equity lines of credit. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph a, b

-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(a)(2),(3),(b))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

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

- Definition

Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

The gross interest income that would have been recorded in the period on troubled debt restructurings, if the loans had been current in accordance with their original terms and had been outstanding throughout the period or since origination, if held for part of the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18794-111554

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Amount before allowance of commercial loans issued to businesses to acquire, develop, construct, improve, or refinance land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5066-111524

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph a

-Article 9

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

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-Subparagraph (SX 210.9-03.7(a))

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-Name Accounting Standards Codification

-Topic 944

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-Paragraph 1

-Subparagraph (SX 210.7-03.1(c))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

No definition available.

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Data Type:	xbrli:monetaryItemType
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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

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Loans And Allowance - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Tolerance for actual to required reserves, percentage	5.00%
Amount of commercial real estate loan and receivable, outstanding	$ 1,094,708
Amount of commercial real estate loan and receivable, specific reserves	148,791
Number of loan commercial real estate	2glbz_NumberOfLoanCommercialRealEstate
Number of commercial real estate loans borrowers	2
Amount of residential real estate loan and receivable, outstanding	622,584
Amount of residential real estate loan and receivable, specific reserves	193,605
Number of loan residential real estate	3glbz_NumberOfLoanResidentialRealEstate
Number of residential real estate loans borrowers	3
Amount of consumer and indirect loans, outstanding	538,248
Amount of consumer and indirect loans, specific reserves	166,226
Number of loan consumer and indirect loans	4
Number of consumer and indirect loans borrowers	4
Loans Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	278,230,503	274,827,478	254,022,692
Unallocated shortfall or excess in allowance for loan losses	3,117,870	2,972,019	3,307,920	3,930,924
Amount of recorded investment in new troubled debt restructurings, totaled	252,500		2,202,268
Amount of loans on which the accrual of interest has been discontinued, totaled	2,777,904	2,713,393	4,008,665
Amount of interest that would have been accrued from non performing financial receivable, totaled	255,682	180,770	273,974
Amount of loans past due 90 days or more and still accruing interest, totaled	196,772	1,607,743	1,612,740
Loans Receivable \| Non-performing TDRs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of recorded investment in new troubled debt restructurings, totaled			2,202,268
Loans Receivable \| Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	3,518,752	4,172,747	4,901,107
Unallocated shortfall or excess in allowance for loan losses	385,631	412,909	541,916	557,169
Amount of recorded investment in new troubled debt restructurings, totaled	252,500
Loans Receivable \| Commercial and Industrial \| Non-performing TDRs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of recorded investment in new troubled debt restructurings, totaled
Loans Receivable \| Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	124,965,977	128,645,690	110,146,196
Unallocated shortfall or excess in allowance for loan losses	1,169,627	593,463	392,506	595,812
Amount of recorded investment in new troubled debt restructurings, totaled			832,500
Loans Receivable \| Residential Real Estate \| Non-performing TDRs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of recorded investment in new troubled debt restructurings, totaled			832,500
Loans Receivable \| Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	65,642,632	68,778,608	72,879,104
Unallocated shortfall or excess in allowance for loan losses	335,009	898,362	1,183,240	2,012,962
Amount of recorded investment in new troubled debt restructurings, totaled			1,369,768
Loans Receivable \| Commercial Real Estate \| Non-performing TDRs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of recorded investment in new troubled debt restructurings, totaled			1,369,768
Loans Receivable \| Unallocated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unallocated shortfall or excess in allowance for loan losses	(53,619)	(120,319)	132,727	(123,633)
Loans Receivable \| Executive Officers Directors and Their Affiliated Interests
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans outstanding, totaled	556,188	1,078,577	354,257
Amount of loans additions, totaled	126,500
Amount of loans repayments, totaled	648,889
Installment \| Loans Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	84,103,142	73,230,433	66,096,285
Collateralized Auto Loans \| Installment \| Loans Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, gross	$ 67,551,000	$ 55,400,000	$ 47,427,000