$MBWM
Mercantile Bank Corp Stock $mbwm

$mbwm Overview Financials Valuation SEC Filings Company Website

2014 Q1 Form 10-K Financial Statement

#000119312514074742 Filed on February 28, 2014

Income Statement

Concept	2014 Q1	2013 Q4	2013 Q3
Revenue		$15.37M	$14.67M
YoY Change		4.82%	-0.68%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$510.0K	$580.0K	$300.0K
YoY Change	-7.27%	1.75%	0.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense			$2.673M
YoY Change			-16.05%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$5.260M	$7.700M	$5.455M
YoY Change	-15.16%	78.24%	41.47%
Income Tax	$1.680M	$2.540M	$2.000M
% Of Pretax Income	31.94%	32.99%	36.66%
Net Earnings	$3.580M	$5.160M	$3.453M
YoY Change	-18.64%	69.18%	32.0%
Net Earnings / Revenue		33.57%	23.54%
Basic Earnings Per Share		$0.59	$0.40
Diluted Earnings Per Share	$409.6K	$0.59	$0.40
COMMON SHARES
Basic Shares Outstanding	8.739M shares	8.708M shares	8.707M shares
Diluted Shares Outstanding			8.725M shares

Balance Sheet

Concept	2014 Q1	2013 Q4	2013 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$24.90M	$24.90M	$25.16M
YoY Change	-3.11%	-3.94%	-3.61%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$15.80M	$17.80M	$19.80M
YoY Change	-22.93%	-19.09%	-13.16%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.414B	$1.427B	$1.422B
YoY Change	2.03%	0.28%	2.42%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$6.400M	$5.800M	$7.000M
YoY Change	4.92%	-30.95%	2.94%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$63.20M	$69.30M	$65.70M
YoY Change	-8.01%	6.94%	9.5%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$6.400M	$5.800M	$7.000M
YoY Change	4.92%	-30.95%	2.94%
LONG-TERM LIABILITIES
Long-Term Debt	$33.00M	$34.60M	$33.00M
YoY Change	0.0%	4.85%	-4.07%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$33.00M	$34.60M	$33.00M
YoY Change	0.0%	4.85%	-4.07%
TOTAL LIABILITIES
Total Short-Term Liabilities	$6.400M	$5.800M	$7.000M
Total Long-Term Liabilities	$33.00M	$34.60M	$33.00M
Total Liabilities	$1.256B	$1.274B	$1.272B
YoY Change	1.63%	-0.21%	2.28%
SHAREHOLDERS EQUITY
Retained Earnings		-$4.101M	-$9.264M
YoY Change		-80.6%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$157.7M	$153.3M	$149.8M
YoY Change
Total Liabilities & Shareholders Equity	$1.414B	$1.427B	$1.422B
YoY Change	2.03%	0.28%	2.42%

Cashflow Statement

Concept	2014 Q1	2013 Q4	2013 Q3
OPERATING ACTIVITIES
Net Income	$3.580M	$5.160M	$3.453M
YoY Change	-18.64%	69.18%	32.0%
Depreciation, Depletion And Amortization	$510.0K	$580.0K	$300.0K
YoY Change	-7.27%	1.75%	0.0%
Cash From Operating Activities	$500.0K	$6.710M	$5.520M
YoY Change	-84.85%	-31.74%	-816.88%
INVESTING ACTIVITIES
Capital Expenditures	-$310.0K	-$80.00K	-$120.0K
YoY Change	287.5%	-46.67%	-57.14%
Acquisitions
YoY Change
Other Investing Activities	-$19.43M	$14.24M	-$15.03M
YoY Change	-231.73%	-252.46%	-172.05%
Cash From Investing Activities	-$19.74M	$14.16M	-$15.14M
YoY Change	-234.56%	-249.05%	-173.53%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-17.78M	170.0K	77.57M
YoY Change	-54.63%	-99.46%	4436.26%
NET CHANGE
Cash From Operating Activities	500.0K	6.710M	5.520M
Cash From Investing Activities	-19.74M	14.16M	-15.14M
Cash From Financing Activities	-17.78M	170.0K	77.57M
Net Change In Cash	-37.02M	21.04M	67.95M
YoY Change	74.46%	-34.27%	215.61%
FREE CASH FLOW
Cash From Operating Activities	$500.0K	$6.710M	$5.520M
Capital Expenditures	-$310.0K	-$80.00K	-$120.0K
Free Cash Flow	$810.0K	$6.790M	$5.640M
YoY Change	-76.04%	-31.96%	-1251.02%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2012Q4	mbwm	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses Accumulated In Investments AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesAccumulatedInInvestments	0
CY2012Q4	mbwm	Available For Sale Securities Gross Unrealized Gains Accumulated In Investments AvailableForSaleSecuritiesGrossUnrealizedGainsAccumulatedInInvestments	4038000
CY2012Q4	mbwm	Financing Receivables Past Due Ninety Days Or More And Still Accruing Interest And Nonaccrual Loans FinancingReceivablesPastDueNinetyDaysOrMoreAndStillAccruingInterestAndNonaccrualLoans	18970000
CY2012Q4	mbwm	Deferred Tax Liabilities Unrealized Gain On Available For Sales Securities DeferredTaxLiabilitiesUnrealizedGainOnAvailableForSalesSecurities	1278000
CY2012Q4	mbwm	Aggregate Out Of Area Deposits AggregateOutOfAreaDeposits	269813000
CY2012Q4	mbwm	Remaining Amount Of Fees Collected From Customers Relates To Risk Participation Agreements Associated With Interest Rate Swap Agreements Reflected As Liabilities RemainingAmountOfFeesCollectedFromCustomersRelatesToRiskParticipationAgreementsAssociatedWithInterestRateSwapAgreementsReflectedAsLiabilities	100000
CY2012Q4	mbwm	Accumulated Other Comprehensive Income Loss Fair Value Of Interest Rate Swap Net Of Tax AccumulatedOtherComprehensiveIncomeLossFairValueOfInterestRateSwapNetOfTax	-700000
CY2013Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2013Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	8739108	shares
CY2013Q4	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Checking PercentageOfInterestBearingDomesticDepositsToDepositsChecking	0.176	pure
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	60876	shares
CY2013Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	60876	shares
CY2013Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2013Q4	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Money Market PercentageOfInterestBearingDomesticDepositsToDepositsMoneyMarket	0.119	pure
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	33.11
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	60876	shares
CY2013Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0012	pure
CY2013Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	33.11
CY2013Q4	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Savings PercentageOfInterestBearingDomesticDepositsToDepositsSavings	0.047	pure
CY2013Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	33.11
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	384000	shares
CY2013Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2013Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	33.11
CY2013Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	60876	shares
CY2013Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	20000000	shares
CY2013Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Weighted Average Interest Rate FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresWeightedAverageInterestRate	0.0134	pure
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	45000000
CY2013Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	32990000
CY2013Q4	us-gaap	Time Deposits TimeDeposits	510968000
CY2013Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	98000
CY2013Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Or Less ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsOrLess	57469000
CY2013Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	21109000
CY2013Q4	us-gaap	Interest Bearing Deposit Liabilities Domestic InterestBearingDepositLiabilitiesDomestic	894331000
CY2013Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	709000
CY2013Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	213454000
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	0
CY2013Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	22821000
CY2013Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	73271000
CY2013Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	80138000
CY2013Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	7435000
CY2013Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	43251000
CY2013Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	95979000
CY2013Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	192000
CY2013Q4	us-gaap	Interest Bearing Domestic Deposit Checking InterestBearingDomesticDepositChecking	197388000
CY2013Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	500000
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-5573000
CY2013Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	22821000
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2013Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	12386000
CY2013Q4	us-gaap	Time Deposits100000 Or More Domestic TimeDeposits100000OrMoreDomestic	254600000
CY2013Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	133369000
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	153325000
CY2013Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	52606000
CY2013Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-5400000
CY2013Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	0
CY2013Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More After12 Months ContractualMaturitiesTimeDeposits100000OrMoreAfter12Months	271013000
CY2013Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	171900000
CY2013Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	463639000
CY2013Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	419000
CY2013Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	116100000
CY2013Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Six Months Through12 Months ContractualMaturitiesTimeDeposits100000OrMoreSixMonthsThrough12Months	93920000
CY2013Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	12386000
CY2013Q4	us-gaap	Deposits Deposits	1118911000
CY2013Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments Without Regulatory Approval StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval	31400000
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-4101000
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	45000000
CY2013Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	48126000
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1426966000
CY2013Q4	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	224580000
CY2013Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	36868000
CY2013Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	34367000
CY2013Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	6689000
CY2013Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	6389000
CY2013Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	69305000
CY2013Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	10435000
CY2013Q4	us-gaap	Contractual Maturities Time Deposits100000 Or More Three Months Through Six Months ContractualMaturitiesTimeDeposits100000OrMoreThreeMonthsThroughSixMonths	41237000
CY2013Q4	us-gaap	Liabilities Liabilities	1273641000
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	0
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	0
CY2013Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	0
CY2013Q4	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	162999000
CY2013Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Amount Liability FairValueDisclosureOffbalanceSheetRisksAmountLiability	374543000
CY2013Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	6718000
CY2013Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	17149000
CY2013Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	1397000
CY2013Q4	us-gaap	Federal Funds Sold FederalFundsSold	123427000
CY2013Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	139487000
CY2013Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1030422000
CY2013Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	92000
CY2013Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	4050000
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	567000
CY2013Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	33368000
CY2013Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	18463000
CY2013Q4	us-gaap	Assets Assets	1426966000
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	29679000
CY2013Q4	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	0
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	17754000
CY2013Q4	us-gaap	Financing Receivable Recorded Investment30 To59 Days Past Due FinancingReceivableRecordedInvestment30To59DaysPastDue	100000
CY2013Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	942000
CY2013Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	400000
CY2013Q4	us-gaap	Financing Receivable Recorded Investment60 To89 Days Past Due FinancingReceivableRecordedInvestment60To89DaysPastDue	44000
CY2013Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0
CY2013Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	46007000
CY2013Q4	us-gaap	Interest Receivable InterestReceivable	3649000
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	58767000
CY2013Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	3500000
CY2013Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	36868000
CY2013Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	146965000
CY2013Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	1052301000
CY2013Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	11900000
CY2013Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	273000
CY2013Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	131178000
CY2013Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	2851000
CY2013Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	2908000
CY2013Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	11961000
CY2013Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1016375000
CY2013Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1053243000
CY2013Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	51377000
CY2013Q4	us-gaap	Loans Held For Sale Mortgages LoansHeldForSaleMortgages	1100000
CY2013Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	6884000
CY2013Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	0
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	7987000
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	88446000
CY2013Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	41056000
CY2013Q4	us-gaap	Other Assets OtherAssets	5911000
CY2013Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	343000
CY2013Q4	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	798000
CY2013Q4	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	500000
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24898000
CY2013Q4	mbwm	Number Of Shares Of Common Stock Issuable Under Employee Stock Purchase Plan Of Two Thousand Two NumberOfSharesOfCommonStockIssuableUnderEmployeeStockPurchasePlanOfTwoThousandTwo	55000	shares
CY2013Q4	mbwm	Percentage Of Out Of Area Interest Bearing Checking PercentageOfOutOfAreaInterestBearingChecking		pure
CY2013Q4	mbwm	Out Of Area Interest Bearing Checking OutOfAreaInterestBearingChecking	0
CY2013Q4	mbwm	Percentage Of Time Deposits Less Than Hundred Thousands To Deposits PercentageOfTimeDepositsLessThanHundredThousandsToDeposits	0.039	pure
CY2013Q4	mbwm	Federal Operating Loss Carryforwards Related To Unrealized Excess Benefits On Stock Based Compensation FederalOperatingLossCarryforwardsRelatedToUnrealizedExcessBenefitsOnStockBasedCompensation	300000
CY2013Q4	mbwm	Related Party Deposits And Repurchase Agreements RelatedPartyDepositsAndRepurchaseAgreements	3900000
CY2013Q4	mbwm	Percentage Of Out Of Area Time Less Than Hundred Thousands PercentageOfOutOfAreaTimeLessThanHundredThousands	0.004	pure
CY2013Q4	mbwm	Percentage Of Time Deposits Equal To Greater Than Hundred Thousands To Deposits PercentageOfTimeDepositsEqualToGreaterThanHundredThousandsToDeposits	0.228	pure
CY2013Q4	mbwm	Loan Portfolio Classes And Segments As Percentage Of Aggregate Loans LoanPortfolioClassesAndSegmentsAsPercentageOfAggregateLoans	1.000	pure
CY2013Q4	mbwm	Fair Value Of Interest Rate Swap Agreement Liability FairValueOfInterestRateSwapAgreementLiability	300000
CY2013Q4	mbwm	Aggregate Percentage Of Local Deposits AggregatePercentageOfLocalDeposits	0.810	pure
CY2013Q4	mbwm	Number Of Mutual Funds With Unrealized Gains NumberOfMutualFundsWithUnrealizedGains	1	Funds
CY2013Q4	mbwm	Federal Alternative Minimum Tax Credits FederalAlternativeMinimumTaxCredits	900000
CY2013Q4	mbwm	Amount Of Federal Reserve Requirement AmountOfFederalReserveRequirement	1500000
CY2013Q4	mbwm	Trust Preferred Securities Included In Tier One Capital TrustPreferredSecuritiesIncludedInTierOneCapital	32000000
CY2013Q4	mbwm	Out Of Area Time Equal To Greater Than Hundred Thousands OutOfAreaTimeEqualToGreaterThanHundredThousands	209039000
CY2013Q4	mbwm	Percentage Out Of Area Time Equal To Greater Than Hundred Thousands PercentageOutOfAreaTimeEqualToGreaterThanHundredThousands	0.186	pure
CY2013Q4	mbwm	Impaired Financing Receivable With No Related Allowance ImpairedFinancingReceivableWithNoRelatedAllowance
CY2013Q4	mbwm	Federal Home Loan Bank Advances Maturity Due Date Last FederalHomeLoanBankAdvancesMaturityDueDateLast	2017-09
CY2013Q4	mbwm	Weighted Average Yield Of Securities Portfolio WeightedAverageYieldOfSecuritiesPortfolio	0.0373	pure
CY2013Q4	mbwm	Out Of Area Time Less Than Hundred Thousands OutOfAreaTimeLessThanHundredThousands	4078000
CY2013Q4	mbwm	Securities Of Specific Issuer Other Than Government And Its Agencies Maximum Percentage On Stockholders Equity SecuritiesOfSpecificIssuerOtherThanGovernmentAndItsAgenciesMaximumPercentageOnStockholdersEquity	0.10	pure
CY2013Q4	mbwm	Federal Home Loan Bank Advances Maturity Due Date Earliest FederalHomeLoanBankAdvancesMaturityDueDateEarliest	2017-03
CY2013Q4	mbwm	Deferred Tax Assets Fair Value Write Downs On Foreclosed Properties DeferredTaxAssetsFairValueWriteDownsOnForeclosedProperties	241000
CY2013Q4	mbwm	Percentage Of Non Interest Bearing Domestic Deposits To Deposits Demand PercentageOfNonInterestBearingDomesticDepositsToDepositsDemand	0.201	pure
CY2013Q4	mbwm	Loans And Leases Receivable Net Of Deferred Income Increase Decrease Percentage LoansAndLeasesReceivableNetOfDeferredIncomeIncreaseDecreasePercentage	0.012	pure
CY2013Q4	mbwm	Aggregate Local Deposit Liabilities AggregateLocalDepositLiabilities	905794000
CY2013Q4	mbwm	Deferred Tax Assets Non Accrual Loan Interest Income DeferredTaxAssetsNonAccrualLoanInterestIncome	605000
CY2013Q4	mbwm	Aggregate Percentage Of Deposits AggregatePercentageOfDeposits	1.000	pure
CY2013Q4	mbwm	Aggregate Percentage Of Out Of Area Deposits AggregatePercentageOfOutOfAreaDeposits	0.190	pure
CY2013Q4	mbwm	Employee Stock Ownership Plan Esop Shares Authorized For Purchase EmployeeStockOwnershipPlanEsopSharesAuthorizedForPurchase	3942	shares
CY2013Q4	mbwm	Available For Sale Securities Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments	10100000
CY2013Q4	mbwm	Available For Sale Securities Gross Unrealized Loss Accumulated In Investments AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments	10100000
CY2013Q4	mbwm	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses Accumulated In Investments AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLossesAccumulatedInInvestments	5833000
CY2013Q4	mbwm	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses Accumulated In Investments AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesAccumulatedInInvestments	4267000
CY2013Q4	mbwm	Available For Sale Securities Gross Unrealized Gains Accumulated In Investments AvailableForSaleSecuritiesGrossUnrealizedGainsAccumulatedInInvestments	1791000
CY2013Q4	mbwm	Financing Receivables Past Due Ninety Days Or More And Still Accruing Interest And Nonaccrual Loans FinancingReceivablesPastDueNinetyDaysOrMoreAndStillAccruingInterestAndNonaccrualLoans	6718000
CY2013Q4	mbwm	Deferred Tax Liabilities Unrealized Gain On Available For Sales Securities DeferredTaxLiabilitiesUnrealizedGainOnAvailableForSalesSecurities	0
CY2013Q4	mbwm	Aggregate Out Of Area Deposits AggregateOutOfAreaDeposits	213117000
CY2013Q4	mbwm	Remaining Amount Of Fees Collected From Customers Relates To Risk Participation Agreements Associated With Interest Rate Swap Agreements Reflected As Liabilities RemainingAmountOfFeesCollectedFromCustomersRelatesToRiskParticipationAgreementsAssociatedWithInterestRateSwapAgreementsReflectedAsLiabilities	100000
CY2013Q4	mbwm	Accumulated Other Comprehensive Income Loss Fair Value Of Interest Rate Swap Net Of Tax AccumulatedOtherComprehensiveIncomeLossFairValueOfInterestRateSwapNetOfTax	-200000
CY2011Q2	us-gaap	Derivative Cap Interest Rate DerivativeCapInterestRate	0.0125	pure
CY2011Q2	mbwm	Notional Amount Of Sold Interest Rate Cap NotionalAmountOfSoldInterestRateCap	100000000
CY2012Q1	mbwm	Trust Preferred Securities TrustPreferredSecurities	32000000
CY2013Q2	dei	Entity Public Float EntityPublicFloat	151500000
CY2014Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	8739108	shares
CY2009Q2	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights	616438	shares
CY2009Q2	us-gaap	Preferred Stock Redemption Price Per Share PreferredStockRedemptionPricePerShare	1000
CY2009Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare
CY2009Q2	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights	5.11
CY2009Q2	us-gaap	Preferred Stock Discount On Shares PreferredStockDiscountOnShares	1300000
CY2009Q2	mbwm	Number Of Cumulative Perpetual Preferred Shares Received By Treasury Under Capital Purchase Program NumberOfCumulativePerpetualPreferredSharesReceivedByTreasuryUnderCapitalPurchaseProgram	21000	shares
CY2009Q2	mbwm	Preferred Stock And Common Stock Warrants Fair Value PreferredStockAndCommonStockWarrantsFairValue	16400000
CY2009Q2	mbwm	Warrant Fair Value WarrantFairValue	900000
CY2009Q2	mbwm	Preferred Stock Fair Value PreferredStockFairValue	15500000
CY2009Q4	mbwm	Maximum Level Of Consolidated Aggregate Assets Allowing For Inclusion Of Trust Preferred Securities In Tier One Capital Under Dodd Frank Act MaximumLevelOfConsolidatedAggregateAssetsAllowingForInclusionOfTrustPreferredSecuritiesInTierOneCapitalUnderDoddFrankAct	15000000000
CY2012Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.09
CY2013Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.11
CY2013Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
CY2013Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
CY2009Q2	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	21000000
CY2009Q2	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	1100000
CY2009Q2	mbwm	Percentage Of Fair Value Attributable To Preferred Stock PercentageOfFairValueAttributableToPreferredStock	0.946	pure
CY2009Q2	mbwm	Percentage Of Fair Value Attributable To Common Stock Warrants PercentageOfFairValueAttributableToCommonStockWarrants	0.054	pure
CY2009Q2	mbwm	Cumulative Dividends Preferred Stock Dividend Rate Percentage For First Five Years CumulativeDividendsPreferredStockDividendRatePercentageForFirstFiveYears	0.0500	pure
CY2009Q2	mbwm	Proceeds From Issuance Or Sale Of Equity Allocated To Preferred Stock ProceedsFromIssuanceOrSaleOfEquityAllocatedToPreferredStock	19900000
CY2009Q2	mbwm	Preferred Stock Fair Value Assumptions Discount Rate PreferredStockFairValueAssumptionsDiscountRate	0.1200	pure
CY2009Q2	mbwm	Preferred Stock Period For Accretion Of Redemption Discount PreferredStockPeriodForAccretionOfRedemptionDiscount	P5Y
CY2009Q2	mbwm	Cumulative Dividends Preferred Stock Dividend Rate Percentage For After Five Years CumulativeDividendsPreferredStockDividendRatePercentageForAfterFiveYears	0.0900	pure
CY2012Q1	mbwm	Hedging Activities Interest Rate Swap Agreement Maturity Date HedgingActivitiesInterestRateSwapAgreementMaturityDate	2018-01
CY2013Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.11
CY2004Q3	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.0960	pure
CY2004Q3	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	16000000
CY2013Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.12
CY2012Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.09
CY2012Q4	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.0400	pure
CY2013Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.12
CY2012Q1	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.0300	pure
CY2013Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.10
CY2011Q2	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.0200	pure
CY2010	mbwm	Share Based Compensation Arrangement By Share Based Payment Award Equity Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityGrantsInPeriod	0	shares
CY2011	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P2Y9M18D
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.07
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8878180	shares
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.20
CY2011	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	644	shares
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
CY2011	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	275335	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	22506000
CY2011	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	4726	shares
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	6.21
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2011	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	8602845	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8602845	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	38339	shares
CY2011	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Lower Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit	6.21
CY2011	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	8800	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	17.80
CY2011	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Upper Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit	40.28
CY2011	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	51237000
CY2011	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-2771000
CY2011	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	44337000
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	39988000
CY2011	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	1640000
CY2011	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	1400000
CY2011	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	3851000
CY2011	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	0
CY2011	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	0
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	28835000
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	0
CY2011	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	199000
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	36142000
CY2011	us-gaap	Fees And Commissions Credit And Debit Cards FeesAndCommissionsCreditAndDebitCards	825000
CY2011	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	595000
CY2011	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	20000000
CY2011	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	6685000
CY2011	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	55000
CY2011	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	681000
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2503000
CY2011	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	24000
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	36142000
CY2011	us-gaap	Fees And Commissions Mortgage Banking FeesAndCommissionsMortgageBanking	846000
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	3851000
CY2011	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	4161000
CY2011	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	556000
CY2011	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	6000
CY2011	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	0
CY2011	us-gaap	Interest Paid InterestPaid	21742000
CY2011	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	27361000
CY2011	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-1539000
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	10124000
CY2011	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	71069000
CY2011	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	200000
CY2011	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	62356000
CY2011	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0
CY2011	us-gaap	Net Income Loss NetIncomeLoss	37485000
CY2011	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-162928000
CY2011	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	1620000
CY2011	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	554000
CY2011	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1805000
CY2011	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	50195000
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	0
CY2011	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1777000
CY2011	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	42000
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	61000
CY2011	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-2384000
CY2011	us-gaap	Noninterest Income NoninterestIncome	7282000
CY2011	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	10000000
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	2503000
CY2011	us-gaap	Noninterest Expense NoninterestExpense	41495000
CY2011	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	200000
CY2011	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-47000
CY2011	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Repayment And Penalties FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresRepaymentAndPenalties	213000
CY2011	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2719000
CY2011	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	2200000
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0
CY2011	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6900000
CY2011	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4806000
CY2011	us-gaap	Equipment Expense EquipmentExpense	1206000
CY2011	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	2033000
CY2011	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-210617000
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-238054000
CY2011	us-gaap	Deferred Tax Expense From Stock Options Exercised DeferredTaxExpenseFromStockOptionsExercised	0
CY2011	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-29640000
CY2011	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	42000
CY2011	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	405000
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	0
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	26000
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	61000
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	12174000
CY2011	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	11062000
CY2011	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-370000
CY2011	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	1010000
CY2011	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	0
CY2011	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	48860000
CY2011	us-gaap	Interest Expense InterestExpense	19832000
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1348000
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3543000
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-27361000
CY2011	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0
CY2011	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	19897000
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	227722000
CY2011	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-44410000
CY2011	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	55000
CY2011	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	1343000
CY2011	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	2843000
CY2011	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	-27361000
CY2011	us-gaap	Interest Expense Deposits InterestExpenseDeposits	16384000
CY2011	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	50925000
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	0
CY2011	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	1089000
CY2011	us-gaap	Occupancy Net OccupancyNet	2780000
CY2011	us-gaap	Depreciation Depreciation	1600000
CY2011	us-gaap	Labor And Related Expense LaborAndRelatedExpense	17891000
CY2011	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	0
CY2011	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	80739000
CY2011	mbwm	Share Based Compensation Arrangement By Share Based Payment Award Equity Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityGrantsInPeriod	0	shares
CY2011	mbwm	Preferred Stock Cash Dividend Accrued PreferredStockCashDividendAccrued	134000
CY2011	mbwm	Rental Income From Other Real Estate Owned RentalIncomeFromOtherRealEstateOwned	825000
CY2011	mbwm	Fees And Commissions Payroll Processing FeesAndCommissionsPayrollProcessing	515000
CY2011	mbwm	Income Tax Reconciliation Bank Owned Life Insurance IncomeTaxReconciliationBankOwnedLifeInsurance	622000
CY2011	us-gaap	Advertising Expense AdvertisingExpense	747000
CY2011	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	1348000
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-27361000
CY2011	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	6000
CY2011	mbwm	Transfers From Loans To Foreclosed Assets TransfersFromLoansToForeclosedAssets	11495000
CY2011	mbwm	Accretion Of Preferred Stock AccretionOfPreferredStock	0
CY2011	mbwm	Increase Decrease In Accrued Expenses And Other Liabilities IncreaseDecreaseInAccruedExpensesAndOtherLiabilities	-1187000
CY2011	mbwm	Fees And Commissions Letter Of Credit FeesAndCommissionsLetterOfCredit	300000
CY2011	mbwm	Net Gain Loss From Sale And Valuation Write Down Of Foreclosed Assets NetGainLossFromSaleAndValuationWriteDownOfForeclosedAssets	-1826000
CY2011	mbwm	Problem Asset Costs ProblemAssetCosts	8290000
CY2011	mbwm	Reversal Of Valuation Allowance On Net Deferred Tax Asset Due To Change In Judgment Regarding Sustained Profitability ReversalOfValuationAllowanceOnNetDeferredTaxAssetDueToChangeInJudgmentRegardingSustainedProfitability	27400000
CY2011	mbwm	Reversal Of Valuation Allowance On Net Deferred Tax Asset Due To Pre Tax Income ReversalOfValuationAllowanceOnNetDeferredTaxAssetDueToPreTaxIncome	2200000
CY2013	dei	Trading Symbol TradingSymbol	MBWM
CY2013	dei	Entity Registrant Name EntityRegistrantName	MERCANTILE BANK CORPORATION
CY2013	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2013	dei	Amendment Flag AmendmentFlag	false
CY2013	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2013	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
CY2013	dei	Document Type DocumentType	10-K
CY2013	dei	Document Period End Date DocumentPeriodEndDate	2013-12-31
CY2013	dei	Entity Incorporation Date Of Incorporation EntityIncorporationDateOfIncorporation	1997-07-15
CY2013	dei	Entity Central Index Key EntityCentralIndexKey	0001042729
CY2013	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2013	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2013	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2013	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2013	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	Segment
CY2013	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P1Y4M24D
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.95
CY2013	us-gaap	Mortgage Loans On Real Estate Minimum Interest Rate In Range MortgageLoansOnRealEstateMinimumInterestRateInRange	0.0400	pure
CY2013	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8724708	shares
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.96
CY2013	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	18950	shares
CY2013	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	1954	shares
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P1Y
CY2013	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Purchase Price Of Common Stock Percent SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent	1.25	pure
CY2013	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	14031	shares
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	28507000
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
CY2013	us-gaap	Repurchase Agreements Maturities RepurchaseAgreementsMaturities	Less than one year
CY2013	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.0012	pure
CY2013	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	1098	shares
CY2013	us-gaap	Derivative Description Of Variable Rate Basis DerivativeDescriptionOfVariableRateBasis	30-Day Libor rate
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	13.72
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2013	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	8710677	shares
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8710677	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	40965	shares
CY2013	us-gaap	Limited Liability Company Or Limited Partnership Business Formation Date LimitedLiabilityCompanyOrLimitedPartnershipBusinessFormationDate	2004-01-01
CY2013	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Lower Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit	6.21
CY2013	us-gaap	Mortgage Loans On Real Estate Maximum Interest Rate In Range MortgageLoansOnRealEstateMaximumInterestRateInRange	0.0700	pure
CY2013	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	51055	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	31.30
CY2013	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.45
CY2013	us-gaap	Use Of Estimates UseOfEstimates	<div> <p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 0pt"> <u>Use of Estimates</u>: To prepare financial statements in conformity with accounting principles generally accepted in the United States of America, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ. The allowance for loan losses and the fair values of financial instruments are particularly subject to change.</p> </div>
CY2013	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Upper Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit	40.28
CY2013	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	47456000
CY2013	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-8465000
CY2013	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	54656000
CY2013	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	9810000
CY2013	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	1532000
CY2013	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	400000
CY2013	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-11111000
CY2013	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	0
CY2013	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	0
CY2013	us-gaap	Shortterm Debt Maximum Amount Outstanding During Period ShorttermDebtMaximumAmountOutstandingDuringPeriod	78960000
CY2013	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	700000
CY2013	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	658000
CY2013	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	49812000
CY2013	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3889000
CY2013	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	212000
CY2013	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	17033000
CY2013	us-gaap	Fees And Commissions Credit And Debit Cards FeesAndCommissionsCreditAndDebitCards	1063000
CY2013	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	347000
CY2013	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	0
CY2013	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	4134000
CY2013	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	551000
CY2013	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-7223000
CY2013	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	21000
CY2013	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	17033000
CY2013	us-gaap	Fees And Commissions Mortgage Banking FeesAndCommissionsMortgageBanking	800000
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-11960000
CY2013	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	65939000
CY2013	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	6634000
CY2013	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	326000
CY2013	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	33000
CY2013	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	1900000
CY2013	us-gaap	Interest Paid InterestPaid	11059000
CY2013	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	0
CY2013	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-225000
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	25125000
CY2013	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	58242000
CY2013	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	2500000
CY2013	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	52924000
CY2013	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0
CY2013	us-gaap	Net Income Loss NetIncomeLoss	17033000
CY2013	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	15298000
CY2013	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	0
CY2013	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	590000
CY2013	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	951000
CY2013	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	48321000
CY2013	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	849000
CY2013	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1329000
CY2013	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	19000
CY2013	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	473000
CY2013	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	0
CY2013	us-gaap	Noninterest Income NoninterestIncome	6872000
CY2013	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	0
CY2013	us-gaap	Loans And Leases Receivable Related Parties Collections LoansAndLeasesReceivableRelatedPartiesCollections	252000
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-7774000
CY2013	us-gaap	Noninterest Expense NoninterestExpense	36403000
CY2013	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	500000
CY2013	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	110000
CY2013	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Repayment And Penalties FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresRepaymentAndPenalties	0
CY2013	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	3440000
CY2013	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-23038000
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-5126000
CY2013	us-gaap	Deferred Tax Expense From Stock Options Exercised DeferredTaxExpenseFromStockOptionsExercised	0
CY2013	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2013	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	8917000
CY2013	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	19000
CY2013	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	80000
CY2013	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	2208000
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	8092000
CY2013	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-7200000
CY2013	us-gaap	Other Noninterest Expense OtherNoninterestExpense	5387000
CY2013	us-gaap	Equipment Expense EquipmentExpense	984000
CY2013	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	411000
CY2013	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	3889000
CY2013	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	533000
CY2013	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	298000
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	408000
CY2013	us-gaap	Share Based Compensation ShareBasedCompensation	473000
CY2013	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	10962000
CY2013	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	7898000
CY2013	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	175000
CY2013	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	1261000
CY2013	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	10310000
CY2013	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	6745000
CY2013	us-gaap	Interest Expense InterestExpense	10786000
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-4186000
CY2013	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8794000
CY2013	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	8092000
CY2013	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	41044000
CY2013	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	1246000
CY2013	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	5290000
CY2013	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	49961000
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-12419000
CY2013	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	4540000
CY2013	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	289000
CY2013	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	0
CY2013	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	793000
CY2013	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	8092000
CY2013	us-gaap	Interest Expense Deposits InterestExpenseDeposits	8912000
CY2013	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	51373000
CY2013	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	0
CY2013	us-gaap	Occupancy Net OccupancyNet	2547000
CY2013	us-gaap	Depreciation Depreciation	1300000
CY2013	us-gaap	Labor And Related Expense LaborAndRelatedExpense	20298000
CY2013	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	10000000
CY2013	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	34809000
CY2013	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	6309000
CY2013	us-gaap	Advertising Expense AdvertisingExpense	1113000
CY2013	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-3888000
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8092000
CY2013	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	33000
CY2013	mbwm	Loan Commitments To Related Parties LoanCommitmentsToRelatedParties	7800000
CY2013	mbwm	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding And Exercisable Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingAndExercisableIntrinsicValue	100000	shares
CY2013	mbwm	Percentage Of Increase Or Decrease In Out Of Area Time Equal To Greater Than Hundred Thousands PercentageOfIncreaseOrDecreaseInOutOfAreaTimeEqualToGreaterThanHundredThousands	-0.130	pure
CY2013	mbwm	Share Based Compensation Arrangement By Share Based Payment Award Award To Non Executive Officers Vesting Period ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardToNonExecutiveOfficersVestingPeriod	3 weeks
CY2013	mbwm	Maximum Restricted Core Element Allowed In Tier One Capital Percent MaximumRestrictedCoreElementAllowedInTierOneCapitalPercent	0.25	pure
CY2013	mbwm	Percentage Of Increase Or Decrease In Time Deposits Less Than Hundred Thousands PercentageOfIncreaseOrDecreaseInTimeDepositsLessThanHundredThousands	-0.164	pure
CY2013	mbwm	Operating Loss Carryforwards Expiration Year Start OperatingLossCarryforwardsExpirationYearStart	2030
CY2013	mbwm	Loans And Leases Receivable Related Parties Adjustments LoansAndLeasesReceivableRelatedPartiesAdjustments	591000
CY2013	mbwm	Transfers From Loans To Foreclosed Assets TransfersFromLoansToForeclosedAssets	2194000
CY2013	mbwm	Percentage Of Increase Or Decrease Of Interest Bearing Checking Deposits PercentageOfIncreaseOrDecreaseOfInterestBearingCheckingDeposits	0.050	pure
CY2013	mbwm	Increase Decrease In Accrued Expenses And Other Liabilities IncreaseDecreaseInAccruedExpensesAndOtherLiabilities	-269000
CY2013	mbwm	Delinquent Period On Loans DelinquentPeriodOnLoans	P90D
CY2013	mbwm	Trusted Preferred Securities Issuance Date TrustedPreferredSecuritiesIssuanceDate	Before May 19, 2010
CY2013	mbwm	Payment Made Under Interest Rate Cap Contract PaymentMadeUnderInterestRateCapContract	0
CY2013	mbwm	Libor Rate Period LiborRatePeriod	P30D
CY2013	mbwm	Loans Modified As Troubled Debt Restructuring Due Period LoansModifiedAsTroubledDebtRestructuringDuePeriod	P30D
CY2013	mbwm	Aggregate Percentage Increase Or Decrease In Out Of Area Deposits AggregatePercentageIncreaseOrDecreaseInOutOfAreaDeposits	-0.210	pure
CY2013	mbwm	Tax Credit Carry Forward Expiration Year End TaxCreditCarryForwardExpirationYearEnd	2033
CY2013	mbwm	Line Of Credit Facility Credit Facility Term LineOfCreditFacilityCreditFacilityTerm	P1Y
CY2013	mbwm	Common Stock Cash Dividend Suspension Period CommonStockCashDividendSuspensionPeriod	2010-04-01
CY2013	mbwm	Date Of Reversal Of Valuation Allowance Deferred Tax Asset DateOfReversalOfValuationAllowanceDeferredTaxAsset	2011-12-31
CY2013	mbwm	Aggregate Increase Or Decrease In Percentage Of Deposits AggregateIncreaseOrDecreaseInPercentageOfDeposits	-0.014	pure
CY2013	mbwm	Consumer And Credit Card Loans Maximum Charged Off Period ConsumerAndCreditCardLoansMaximumChargedOffPeriod	P120D
CY2013	mbwm	Fees And Commissions Letter Of Credit FeesAndCommissionsLetterOfCredit	370000
CY2013	mbwm	Percentage Of Ownership Interest Distributed To Insurance Authority PercentageOfOwnershipInterestDistributedToInsuranceAuthority	0.01	pure
CY2013	mbwm	Percentage Of Increase Or Decrease In Non Interest Bearing Demand Deposits PercentageOfIncreaseOrDecreaseInNonInterestBearingDemandDeposits	0.181	pure
CY2013	mbwm	Share Based Compensation Arrangement By Share Based Payment Award Equity Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityGrantsInPeriod	0	shares
CY2013	mbwm	Operating Loss Carryforwards Expiration Year End OperatingLossCarryforwardsExpirationYearEnd	2031
CY2013	mbwm	Preferred Stock Cash Dividend Accrued PreferredStockCashDividendAccrued	0
CY2013	mbwm	Term Debt Secured By Non Real Estate Collateral Maturity Period TermDebtSecuredByNonRealEstateCollateralMaturityPeriod	P5Y
CY2013	mbwm	Percentage Of Increase Or Decrease Of Money Market Deposits PercentageOfIncreaseOrDecreaseOfMoneyMarketDeposits	-0.077	pure
CY2013	mbwm	Percentage Of Increase Or Decrease In Time Deposits Equal To Greater Than Hundred Thousands PercentageOfIncreaseOrDecreaseInTimeDepositsEqualToGreaterThanHundredThousands	0.086	pure
CY2013	mbwm	Rental Income From Other Real Estate Owned RentalIncomeFromOtherRealEstateOwned	528000
CY2013	mbwm	Term Debt Secured By Real Estate Balloon Payment Period TermDebtSecuredByRealEstateBalloonPaymentPeriod	P5Y
CY2013	mbwm	Aggregate Percentage Increase Or Decrease In Local Deposits AggregatePercentageIncreaseOrDecreaseInLocalDeposits	0.047	pure
CY2013	mbwm	Percentage Of Increase Or Decrease Of Savings Deposits PercentageOfIncreaseOrDecreaseOfSavingsDeposits	-0.068	pure
CY2013	mbwm	Fees And Commissions Payroll Processing FeesAndCommissionsPayrollProcessing	660000
CY2013	mbwm	Percentage Of Increase Or Decrease In Out Of Area Interest Bearing Checking PercentageOfIncreaseOrDecreaseInOutOfAreaInterestBearingChecking		pure
CY2013	mbwm	Percentage Of Increase Or Decrease In Out Of Area Time Less Than Hundred Thousands PercentageOfIncreaseOrDecreaseInOutOfAreaTimeLessThanHundredThousands	-0.471	pure
CY2013	mbwm	Mortgage Company Reorganized To Limited Liability Company Llc Or Limited Partnership Lp Members Or Limited Partners Ownership Percentage MortgageCompanyReorganizedToLimitedLiabilityCompanyLlcOrLimitedPartnershipLpMembersOrLimitedPartnersOwnershipPercentage	0.99	pure
CY2013	mbwm	Warrant Expiration Period WarrantExpirationPeriod	P10Y
CY2013	mbwm	Tax Credit Carry Forward Expiration Year Start TaxCreditCarryForwardExpirationYearStart	2028
CY2013	mbwm	Income Tax Reconciliation Bank Owned Life Insurance IncomeTaxReconciliationBankOwnedLifeInsurance	465000
CY2013	mbwm	Transfers In Or Out Of Level One Level Two Or Level Three Of Fair Value Hierarchy TransfersInOrOutOfLevelOneLevelTwoOrLevelThreeOfFairValueHierarchy	0
CY2013	mbwm	Financing Receivable Modification Number Of Contracts FinancingReceivableModificationNumberOfContracts	10	Contract
CY2013	mbwm	Financing Receivable Modification Pre Modification Recorded Investment FinancingReceivableModificationPreModificationRecordedInvestment	7231000
CY2013	mbwm	Financing Receivable Modification Post Modification Recorded Investment FinancingReceivableModificationPostModificationRecordedInvestment	7231000
CY2013	mbwm	Financing Receivables Modifications Subsequent Default Number Of Contracts FinancingReceivablesModificationsSubsequentDefaultNumberOfContracts	1	Contract
CY2013	mbwm	Financing Receivables Modifications Subsequent Default Recorded Investment FinancingReceivablesModificationsSubsequentDefaultRecordedInvestment	65000
CY2013	mbwm	Net Gain Loss From Sale And Valuation Write Down Of Foreclosed Assets NetGainLossFromSaleAndValuationWriteDownOfForeclosedAssets	1585000
CY2013	mbwm	Problem Asset Costs ProblemAssetCosts	595000
CY2013	mbwm	Maturity Period Of Short Term Borrowings MaturityPeriodOfShortTermBorrowings	90 days or less
CY2013	mbwm	Entity Incorporation Date Of Operations EntityIncorporationDateOfOperations	1997-12-15
CY2013	mbwm	Mortgage Dissolution Date MortgageDissolutionDate	2013-01-01
CY2009	mbwm	Share Based Compensation Arrangement By Share Based Payment Award Equity Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityGrantsInPeriod	0	shares
CY2012	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P1Y10M24D
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.30
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8849627	shares
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.33
CY2012	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	19120	shares
CY2012	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	934	shares
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
CY2012	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	224429	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
CY2012	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.0025	pure
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	17021000
CY2012	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	2400	shares
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	10.83
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2012	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	8625198	shares
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8625198	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	11077	shares
CY2012	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Lower Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit	6.21
CY2012	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	50930	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	23.77
CY2012	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.09
CY2012	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Upper Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit	40.28
CY2012	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	46701000
CY2012	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1805000
CY2012	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	49801000
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	10857000
CY2012	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	1523000
CY2012	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	800000
CY2012	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-3297000
CY2012	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	0
CY2012	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	7465000
CY2012	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	69956000
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	774000
CY2012	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	192000
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	11505000
CY2012	us-gaap	Fees And Commissions Credit And Debit Cards FeesAndCommissionsCreditAndDebitCards	891000
CY2012	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	486000
CY2012	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	30000000
CY2012	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	4383000
CY2012	us-gaap	Shortterm Debt Maximum Amount Outstanding During Period ShorttermDebtMaximumAmountOutstandingDuringPeriod	81980000
CY2012	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	551000
CY2012	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	1247000
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-723000
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1678000
CY2012	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	29000
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	11505000
CY2012	us-gaap	Fees And Commissions Mortgage Banking FeesAndCommissionsMortgageBanking	1479000
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-2184000
CY2012	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	61930000
CY2012	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	7889000
CY2012	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	571000
CY2012	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	14000
CY2012	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	0
CY2012	us-gaap	Interest Paid InterestPaid	13741000
CY2012	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	0
CY2012	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-529000
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	18171000
CY2012	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	59917000
CY2012	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	2000000
CY2012	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	53898000
CY2012	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	21000000
CY2012	us-gaap	Net Income Loss NetIncomeLoss	12535000
CY2012	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-16237000
CY2012	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	496000
CY2012	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	585000
CY2012	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1415000
CY2012	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	83986000
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	-1113000
CY2012	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1528000
CY2012	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	39000
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	54000
CY2012	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	0
CY2012	us-gaap	Noninterest Income NoninterestIncome	7994000
CY2012	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	0
CY2012	us-gaap	Loans And Leases Receivable Related Parties Collections LoansAndLeasesReceivableRelatedPartiesCollections	110000
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-955000
CY2012	us-gaap	Noninterest Expense NoninterestExpense	39624000
CY2012	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	400000
CY2012	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	297000
CY2012	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Repayment And Penalties FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresRepaymentAndPenalties	0
CY2012	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	3193000
CY2012	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-47257000
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-24120000
CY2012	us-gaap	Deferred Tax Expense From Stock Options Exercised DeferredTaxExpenseFromStockOptionsExercised	0
CY2012	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2012	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	16770000
CY2012	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	39000
CY2012	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	157000
CY2012	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	2238000
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	5636000
CY2012	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-3100000
CY2012	us-gaap	Other Noninterest Expense OtherNoninterestExpense	5158000
CY2012	us-gaap	Equipment Expense EquipmentExpense	1176000
CY2012	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	324000
CY2012	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	774000
CY2012	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	993000
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-390000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	307000
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	54000
CY2012	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	21000000
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	59631000
CY2012	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	18348000
CY2012	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	10000
CY2012	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	929000
CY2012	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	0
CY2012	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	70386000
CY2012	us-gaap	Interest Expense InterestExpense	13216000
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1229000
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6360000
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	5636000
CY2012	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	44548000
CY2012	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0
CY2012	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	12644000
CY2012	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	20000000
CY2012	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	102672000
CY2012	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	61318000
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	66730000
CY2012	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-7804000
CY2012	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	227000
CY2012	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	1030000
CY2012	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1200000
CY2012	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	5636000
CY2012	us-gaap	Interest Expense Deposits InterestExpenseDeposits	11137000
CY2012	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	83713000
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	0
CY2012	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	361000
CY2012	us-gaap	Occupancy Net OccupancyNet	2501000
CY2012	us-gaap	Depreciation Depreciation	1500000
CY2012	us-gaap	Labor And Related Expense LaborAndRelatedExpense	19367000
CY2012	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	324000
CY2012	us-gaap	Advertising Expense AdvertisingExpense	1167000
CY2012	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-1619000
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5636000
CY2012	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	14000
CY2012	mbwm	Loan Commitments To Related Parties LoanCommitmentsToRelatedParties	2900000
CY2012	mbwm	Loans And Leases Receivable Related Parties Adjustments LoansAndLeasesReceivableRelatedPartiesAdjustments	38000
CY2012	mbwm	Transfers From Loans To Foreclosed Assets TransfersFromLoansToForeclosedAssets	11761000
CY2012	mbwm	Accretion Of Preferred Stock AccretionOfPreferredStock	0
CY2012	mbwm	Increase Decrease In Accrued Expenses And Other Liabilities IncreaseDecreaseInAccruedExpensesAndOtherLiabilities	2257000
CY2012	mbwm	Loans Modified As Troubled Debt Restructuring Due Period LoansModifiedAsTroubledDebtRestructuringDuePeriod	P30D
CY2012	mbwm	Fees And Commissions Letter Of Credit FeesAndCommissionsLetterOfCredit	336000
CY2012	mbwm	Share Based Compensation Arrangement By Share Based Payment Award Equity Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityGrantsInPeriod	0	shares
CY2012	mbwm	Repurchase Of Common Stock Warrant RepurchaseOfCommonStockWarrant	7465000
CY2012	mbwm	Preferred Stock Cash Dividend Accrued PreferredStockCashDividendAccrued	0
CY2012	mbwm	Rental Income From Other Real Estate Owned RentalIncomeFromOtherRealEstateOwned	1061000
CY2012	mbwm	Fees And Commissions Payroll Processing FeesAndCommissionsPayrollProcessing	591000
CY2012	mbwm	Income Tax Reconciliation Bank Owned Life Insurance IncomeTaxReconciliationBankOwnedLifeInsurance	535000
CY2012	mbwm	Transfers In Or Out Of Level One Level Two Or Level Three Of Fair Value Hierarchy TransfersInOrOutOfLevelOneLevelTwoOrLevelThreeOfFairValueHierarchy	0
CY2012	mbwm	Financing Receivable Modification Number Of Contracts FinancingReceivableModificationNumberOfContracts	29	Contract
CY2012	mbwm	Financing Receivable Modification Pre Modification Recorded Investment FinancingReceivableModificationPreModificationRecordedInvestment	32089000
CY2012	mbwm	Financing Receivable Modification Post Modification Recorded Investment FinancingReceivableModificationPostModificationRecordedInvestment	32084000
CY2012	mbwm	Financing Receivables Modifications Subsequent Default Number Of Contracts FinancingReceivablesModificationsSubsequentDefaultNumberOfContracts	0	Contract
CY2012	mbwm	Financing Receivables Modifications Subsequent Default Recorded Investment FinancingReceivablesModificationsSubsequentDefaultRecordedInvestment	0
CY2012	mbwm	Net Gain Loss From Sale And Valuation Write Down Of Foreclosed Assets NetGainLossFromSaleAndValuationWriteDownOfForeclosedAssets	-1725000
CY2013Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11454000
CY2013Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4400000
CY2013Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	14209000
CY2012	mbwm	Problem Asset Costs ProblemAssetCosts	5862000
CY2013Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.10
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.50
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.51
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2012Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11869000
CY2012Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2552000
CY2012Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	15553000
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.36
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.38
CY2012Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11511000
CY2012Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3288000
CY2012Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	14930000
CY2012Q2	mbwm	Reduction From Retained Earnings Resulting From Accelerated Discount On Preferred Stock ReductionFromRetainedEarningsResultingFromAcceleratedDiscountOnPreferredStock	600000
CY2013Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.46
CY2013Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.46
CY2013Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11312000
CY2013Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4016000
CY2013Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	13992000
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.35
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.35
CY2012Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11737000
CY2012Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3049000
CY2012Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	14666000
CY2013Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.59
CY2013Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.59
CY2013Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	12695000
CY2013Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	5163000
CY2013Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	15373000
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.30
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2012Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11584000
CY2012Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2616000
CY2012Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	14768000
CY2012Q3	mbwm	Reduction In Shareholders Equity Resulting From Repurchase Of Warrant ReductionInShareholdersEquityResultingFromRepurchaseOfWarrant	7500000
CY2013Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.40
CY2013Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.40
CY2013Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11994000
CY2013Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3453000
CY2013Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	14667000

Files In Submission

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$MBWM
Mercantile Bank Corp Stock $mbwm

2014 Q1 Form 10-K Financial Statement

#000119312514074742 Filed on February 28, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MBWM Mercantile Bank Corp Stock $mbwm

2014 Q1 Form 10-K Financial Statement

#000119312514074742 Filed on February 28, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MBWM
Mercantile Bank Corp Stock $mbwm