XML 19 R48.htm IDEA: XBRL DOCUMENT v2.4.0.8

Note 7 - Loans And Related Allowance For Loan Losses (Details) - Troubled Debt Restructurings That Subsequently Defaulted Year to Date (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Commercial and Industrial [Member]
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Troubled Debt Restructurings That Subsequently Defaulted Year to Date [Line Items]
Troubled Debt Restructurings Subsequently Defaulted Number of Contacts	1	1	2
Troubled Debt Restructurings Subsequently Defaulted Recorded Investment (in Dollars)	$ 30	$ 565	$ 60
Residential Real Estate Mortgage [Member]
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Troubled Debt Restructurings That Subsequently Defaulted Year to Date [Line Items]
Troubled Debt Restructurings Subsequently Defaulted Number of Contacts	1		1
Troubled Debt Restructurings Subsequently Defaulted Recorded Investment (in Dollars)	20		20
Commercial Real Estate Mortgage [Member]
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Troubled Debt Restructurings That Subsequently Defaulted Year to Date [Line Items]
Troubled Debt Restructurings Subsequently Defaulted Number of Contacts		1
Troubled Debt Restructurings Subsequently Defaulted Recorded Investment (in Dollars)		$ 190

X

- Details

Name:	mbcn_Note7LoansAndRelatedAllowanceForLoanLossesDetailsTroubledDebtRestructuringsThatSubsequentlyDefaultedYeartoDateLineItems
Namespace Prefix:	mbcn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and 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

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- 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

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration