XML 55 R42.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Note 7 - Loans and Related Allowance for Loan Losses (Details) - Allowance for Loan Losses - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2016 | Dec. 31, 2015
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment |  |  | $ 811 | $ 833
Collectively evaluated for impairment |  |  | 5,546 | 5,552
Total ending allowance balance | $ 6,357 | $ 6,846 | 6,357 | 6,385
Ending allowance balance attributable to loans: |  |  |  |
ALLL balance, period end | 6,385 | 6,846 |  |
ALLL balance, period start | 6,357 | 6,447 |  |
Charge-offs | (177) | (679) |  |
Recoveries | 44 | 175 |  |
Provision | 105 | 105 |  |
Commercial and Industrial [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment |  |  | 323 | 388
Collectively evaluated for impairment |  |  | 260 | 479
Total ending allowance balance | 583 | 642 | 583 | 867
Ending allowance balance attributable to loans: |  |  |  |
ALLL balance, period end | 867 | 642 |  |
ALLL balance, period start | 583 | 493 |  |
Charge-offs | (120) | (100) |  |
Recoveries | 37 | 162 |  |
Provision | (201) | (211) |  |
Real Estate Construction Porfolio Segment [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment |  |  | 118 | 130
Collectively evaluated for impairment |  |  | 129 | 146
Total ending allowance balance | 247 | 868 | 247 | 276
Ending allowance balance attributable to loans: |  |  |  |
ALLL balance, period end | 276 | 868 |  |
ALLL balance, period start | 247 | 494 |  |
Charge-offs |  | (385) |  |
Recoveries | 0 |  |  |
Provision | (29) | 11 |  |
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment |  |  | 269 | 276
Collectively evaluated for impairment |  |  | 2,447 | 2,863
Total ending allowance balance | 2,716 | 3,703 | 2,716 | 3,139
Ending allowance balance attributable to loans: |  |  |  |
ALLL balance, period end | 3,139 | 3,703 |  |
ALLL balance, period start | 2,716 | 3,459 |  |
Charge-offs | (42) | (191) |  |
Recoveries | 4 | 12 |  |
Provision | (385) | (65) |  |
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment |  |  | 101 | 39
Collectively evaluated for impairment |  |  | 2,682 | 2,039
Total ending allowance balance | 2,783 | 1,576 | 2,783 | 2,078
Ending allowance balance attributable to loans: |  |  |  |
ALLL balance, period end | 2,078 | 1,576 |  |
ALLL balance, period start | 2,783 | 1,958 |  |
Charge-offs |  | 0 |  |
Provision | 705 | 382 |  |
Consumer Portfolio Segment [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment |  |  |  | 0
Collectively evaluated for impairment |  |  | 28 | 25
Total ending allowance balance | 28 | 57 | $ 28 | $ 25
Ending allowance balance attributable to loans: |  |  |  |
ALLL balance, period end | 25 | 57 |  |
ALLL balance, period start | 28 | 43 |  |
Charge-offs | (15) | (3) |  |
Recoveries | 3 | 1 |  |
Provision | $ 15 | $ (12) |  |

X
- References No definition available. + Details
Name: | mbcn_EndingAllowanceBalanceAttributableToLoansAbstract
Namespace Prefix: | mbcn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | mbcn_EndingAllowanceBalanceAttributableToLoansAbstract0
Namespace Prefix: | mbcn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + 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)(4) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + 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)(3) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 2: 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(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively 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=66008989&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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=66008989&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for 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 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 2: 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=66008989&loc=SL6953423-111524 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(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of expense related to estimated loss from loan and lease transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
Name: | us-gaap_ProvisionForLoanAndLeaseLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=mbcn_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=mbcn_RealEstateConstructionPorfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=mbcn_RealEstateMortgagePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mbcn_ResidentialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mbcn_CommercialLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |