The amount of time required to pay off a loan.

No definition available.

Name:	mcbi_AmortizationPeriod
Namespace Prefix:	mcbi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

The term of a loan which does not fully amortize, thus leaving a balance due at maturity.

+ References

No definition available.

+ Details

Name:	mcbi_BalloonPaymentPeriod
Namespace Prefix:	mcbi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	mcbi_Note3LoansDetailsLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Principal reduction, percentage.

+ References

No definition available.

+ Details

Name:	mcbi_PrincipalReductionPercentage
Namespace Prefix:	mcbi_
Data Type:	num:percentItemType
Balance Type:	na
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

+ Details

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

- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 34

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953682-111524

+ Details

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

- 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

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

+ Details

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

- Definition

Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring.

+ 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

+ Details

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

- Definition

Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period).

+ References

+ Details

Name:	us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Cash payments for and related to principal collection on loans related to operating activities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

+ Details

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

Note 3 - Loans (Details) (USD $)	9 Months Ended		12 Months Ended									1 Months Ended
Note 3 - Loans (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2013 Consumer Loans [Member] Minimum [Member]	Sep. 30, 2013 Consumer Loans [Member] Maximum [Member]	Sep. 30, 2013 MetroBank [Member] Minimum [Member]	Sep. 30, 2013 MetroBank [Member] Maximum [Member]	Sep. 30, 2013 Metro United [Member] Minimum [Member]	Sep. 30, 2013 Metro United [Member] Maximum [Member]	Sep. 30, 2013 MetroBank Maximum [Member]	Sep. 30, 2013 Metro United Maximum [Member]	Sep. 30, 2013 Restructed Loan Participation Payoff [Member]	Sep. 30, 2013 Minimum [Member]	Sep. 30, 2013 Maximum [Member]
Note 3 - Loans (Details) [Line Items]
Loans and Leases Receivable, Gross										$ 13,000,000	$ 8,000,000
Amortization Period				12 months	60 months	15 years	20 years	25 years	30 years				15 years	30 years
Balloon Payment Period						five	seven	five	ten				two	seven
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans	28,000	139,000
Loans and Leases Receivable, Impaired, Commitment to Lend	0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment			0
Financing Receivable, Modifications, Recorded Investment	0		0
Principal Reduction, Percentage	72.00%		72.00%
Payments for Loans												$ 211,000