XML 123 R91.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Commitments (Details) - Outstanding Commitments and Contingent Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Commitments Contingencies And Litigation [Line Items] |  |
Commitments | $ 116,538 | $ 102,461
Commitments to Extend Credit [Member] |  |
Commitments Contingencies And Litigation [Line Items] |  |
Commitments | 112,134 | 97,947
Financial Standby Letter of Credit [Member] |  |
Commitments Contingencies And Litigation [Line Items] |  |
Commitments | $ 4,404 | $ 4,514

X
- Definition Commitments Contingencies And Litigation [Line Items] + References No definition available. + Details
Name: | mbcn_CommitmentsContingenciesAndLitigationLineItems
Namespace Prefix: | mbcn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
Name: | us-gaap_OtherCommitment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommitmentsToExtendCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_FinancialStandbyLetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |