XML 77 R41.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 3 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans (USD $) | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Note 3 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items] |  |
Non Accrual Loans | $ 6,342,000 | $ 6,718,000
Commercial and Industrial [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items] |  |
Non Accrual Loans | 919,000 | 1,501,000
Commercial Vacant Land And Land Development And Residential Construction Loan [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items] |  |
Non Accrual Loans | 361,000 | 785,000
Commercial Real Estate Owner Occupied Loan [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items] |  |
Non Accrual Loans | 684,000 | 389,000
Commercial Real Estate Non Owner Occupied Loan [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items] |  |
Non Accrual Loans | 335,000 | 168,000
Commercial Real Estate Multi Family And Residential Rental Loan [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items] |  |
Non Accrual Loans | 492,000 | 208,000
Commercial [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items] |  |
Non Accrual Loans | 2,791,000 | 3,051,000
Retail Home Equity And Other Loan [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items] |  |
Non Accrual Loans | 762,000 | 788,000
Retail Family Mortgages Loan [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items] |  |
Non Accrual Loans | 2,789,000 | 2,879,000
Retail Loan [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - Recorded Principal Balance of Nonaccrual Loans [Line Items] |  |
Non Accrual Loans | $ 3,551,000 | $ 3,667,000

X
- Details
Name: | mbwm_Note3LoansandAllowanceforLoanLossesDetailsRecordedPrincipalBalanceofNonaccrualLoansLineItems
Namespace Prefix: | mbwm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + 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=28368275&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant