$MBWM
Mercantile Bank Corp Stock $mbwm

$mbwm Overview Financials Valuation SEC Filings Company Website

2024 Q3 Form 10-Q Financial Statement

#000143774924024367 Filed on August 02, 2024

Income Statement

Concept	2024 Q3	2024 Q2
Revenue	$83.41M	$78.88M
YoY Change	17.23%	19.66%
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	$1.500M	$1.500M
YoY Change	0.0%	7.14%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$24.56M	$23.52M
YoY Change	-5.51%	-7.3%
Income Tax	$4.938M	$4.730M
% Of Pretax Income	20.11%	20.11%
Net Earnings	$19.62M	$18.79M
YoY Change	-5.93%	-7.72%
Net Earnings / Revenue	23.52%	23.82%
Basic Earnings Per Share	$1.22	$1.17
Diluted Earnings Per Share	$1.22	$1.17
COMMON SHARES
Basic Shares Outstanding	16.14M	16.12M
Diluted Shares Outstanding	16.14M	16.12M

Balance Sheet

Concept	2024 Q3	2024 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$328.5M	$197.6M
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	$54.23M	$50.16M
YoY Change	3.83%	-4.08%
Goodwill	$49.47M	$49.47M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$5.917B	$5.602B
YoY Change	12.69%	9.05%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$100.5M	$116.6M
YoY Change	-2.13%	52.1%
Accrued Expenses		$4.900M
YoY Change		28.95%
Deferred Revenue
YoY Change
Short-Term Debt	$220.9M	$221.9M
YoY Change	34.63%	1.11%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$321.4M	$338.5M
YoY Change	18.7%	14.31%
LONG-TERM LIABILITIES
Long-Term Debt	$139.4M	$139.1M
YoY Change	0.71%	0.75%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$139.4M	$139.1M
YoY Change	0.71%	0.75%
TOTAL LIABILITIES
Total Short-Term Liabilities	$321.4M	$338.5M
Total Long-Term Liabilities	$139.4M	$139.1M
Total Liabilities	$5.334B	$5.051B
YoY Change	11.87%	8.42%
SHAREHOLDERS EQUITY
Retained Earnings	$320.7M	$306.8M
YoY Change	22.02%	24.05%
Common Stock	$298.7M	$297.6M
YoY Change	1.61%	1.6%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$583.3M	$551.2M
YoY Change
Total Liabilities & Shareholders Equity	$5.917B	$5.602B
YoY Change	12.69%	9.05%

Cashflow Statement

Concept	2024 Q3	2024 Q2
OPERATING ACTIVITIES
Net Income	$19.62M	$18.79M
YoY Change	-5.93%	-7.72%
Depreciation, Depletion And Amortization	$1.500M	$1.500M
YoY Change	0.0%	7.14%
Cash From Operating Activities		$9.112M
YoY Change		-53.04%
INVESTING ACTIVITIES
Capital Expenditures		$869.0K
YoY Change		-59.99%
Acquisitions
YoY Change
Other Investing Activities		-$154.6M
YoY Change		79.69%
Cash From Investing Activities		-$155.4M
YoY Change		76.25%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities		106.7M
YoY Change		-51.19%
NET CHANGE
Cash From Operating Activities		9.112M
Cash From Investing Activities		-155.4M
Cash From Financing Activities		106.7M
Net Change In Cash		-39.60M
YoY Change		-126.43%
FREE CASH FLOW
Cash From Operating Activities		$9.112M
Capital Expenditures		$869.0K
Free Cash Flow		$8.243M
YoY Change		-52.16%

Facts In Submission

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	dei	Document Period End Date DocumentPeriodEndDate	2024-06-30
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	dei	Entity File Number EntityFileNumber	000-26719
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MI
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	38-3360865
	dei	Entity Address Address Line1 EntityAddressAddressLine1	310 Leonard Street, NW
	dei	Entity Address City Or Town EntityAddressCityOrTown	Grand Rapids
	dei	Entity Address State Or Province EntityAddressStateOrProvince	MI
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	49504
	dei	City Area Code CityAreaCode	616
	dei	Local Phone Number LocalPhoneNumber	406-3000
	dei	Security12b Title Security12bTitle	Common Stock
	dei	Trading Symbol TradingSymbol	MBWM
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
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CY2024Q2	mbwm	Interest Rate Swap Program Fees InterestRateSwapProgramFees	766000	usd
CY2023Q2	mbwm	Interest Rate Swap Program Fees InterestRateSwapProgramFees	748000	usd
	mbwm	Interest Rate Swap Program Fees InterestRateSwapProgramFees	2104000	usd
	mbwm	Interest Rate Swap Program Fees InterestRateSwapProgramFees	1785000	usd
CY2024Q2	mbwm	Fees And Commissions Payroll Processing FeesAndCommissionsPayrollProcessing	686000	usd
CY2023Q2	mbwm	Fees And Commissions Payroll Processing FeesAndCommissionsPayrollProcessing	572000	usd
	mbwm	Fees And Commissions Payroll Processing FeesAndCommissionsPayrollProcessing	1582000	usd
	mbwm	Fees And Commissions Payroll Processing FeesAndCommissionsPayrollProcessing	1317000	usd
CY2024Q2	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	437000	usd
CY2023Q2	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	402000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1609000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	802000	usd
CY2024Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	811000	usd
CY2023Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	598000	usd
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2277000	usd
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	1117000	usd
CY2024Q2	us-gaap	Noninterest Income NoninterestIncome	9681000	usd
CY2023Q2	us-gaap	Noninterest Income NoninterestIncome	7645000	usd
	us-gaap	Noninterest Income NoninterestIncome	20548000	usd
	us-gaap	Noninterest Income NoninterestIncome	14597000	usd
CY2024Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	17913000	usd
CY2023Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	16461000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	36150000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	33143000	usd
CY2024Q2	us-gaap	Occupancy Net OccupancyNet	2220000	usd
CY2023Q2	us-gaap	Occupancy Net OccupancyNet	2098000	usd
	us-gaap	Occupancy Net OccupancyNet	4509000	usd
	us-gaap	Occupancy Net OccupancyNet	4387000	usd
CY2024Q2	us-gaap	Equipment Expense EquipmentExpense	923000	usd
CY2023Q2	us-gaap	Equipment Expense EquipmentExpense	878000	usd
	us-gaap	Equipment Expense EquipmentExpense	1852000	usd
	us-gaap	Equipment Expense EquipmentExpense	1700000	usd
CY2024Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	3415000	usd
CY2023Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2881000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	6704000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	6043000	usd
CY2024Q2	mbwm	Charitable Foundation Contribution Expense CharitableFoundationContributionExpense	4000	usd
CY2023Q2	mbwm	Charitable Foundation Contribution Expense CharitableFoundationContributionExpense	2000	usd
	mbwm	Charitable Foundation Contribution Expense CharitableFoundationContributionExpense	707000	usd
	mbwm	Charitable Foundation Contribution Expense CharitableFoundationContributionExpense	12000	usd
CY2024Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	5262000	usd
CY2023Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	5509000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	9758000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	11144000	usd
CY2024Q2	us-gaap	Noninterest Expense NoninterestExpense	29737000	usd
CY2023Q2	us-gaap	Noninterest Expense NoninterestExpense	27829000	usd
	us-gaap	Noninterest Expense NoninterestExpense	59680000	usd
	us-gaap	Noninterest Expense NoninterestExpense	56429000	usd
CY2024Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	23516000	usd
CY2023Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	25367000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	50502000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	51503000	usd
CY2024Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4730000	usd
CY2023Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5010000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10154000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10171000	usd
CY2024Q2	us-gaap	Net Income Loss NetIncomeLoss	18786000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	20357000	usd
	us-gaap	Net Income Loss NetIncomeLoss	40348000	usd
	us-gaap	Net Income Loss NetIncomeLoss	41332000	usd
CY2024Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.17
CY2023Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.27
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.5
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.58
CY2024Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.17
CY2023Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.27
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.5
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.58
CY2024Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	16122813
CY2023Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	16003372
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	16120836
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15999775
CY2024Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	16122813
CY2023Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	16003372
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	16120836
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15999775
CY2024Q2	us-gaap	Net Income Loss NetIncomeLoss	18786000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	20357000	usd
	us-gaap	Net Income Loss NetIncomeLoss	40348000	usd
	us-gaap	Net Income Loss NetIncomeLoss	41332000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-342000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-6645000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-3491000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	4841000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-73000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1395000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-734000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1017000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-269000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5250000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2757000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3824000	usd
CY2024Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	18517000	usd
CY2023Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	15107000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	37591000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	45156000	usd
CY2024Q1	us-gaap	Stockholders Equity StockholdersEquity	536644000	usd
CY2024Q2	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	13000	usd
CY2024Q2	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	201000	usd
CY2024Q2	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	421000	usd
CY2024Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	891000	usd
CY2024Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5536000	usd
CY2024Q2	us-gaap	Net Income Loss NetIncomeLoss	18786000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-269000	usd
CY2024Q2	us-gaap	Stockholders Equity StockholdersEquity	551151000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	522145000	usd
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	24000	usd
	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	405000	usd
	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	423000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1633000	usd
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	11070000	usd
	us-gaap	Net Income Loss NetIncomeLoss	40348000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-2757000	usd
CY2024Q2	us-gaap	Stockholders Equity StockholdersEquity	551151000	usd
CY2023Q1	us-gaap	Stockholders Equity StockholdersEquity	467372000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	13000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	232000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	317000	usd
CY2023Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	828000	usd
CY2023Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5167000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	20357000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-5250000	usd
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	478702000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	441408000	usd
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	23000	usd
	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	449000	usd
	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	317000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1681000	usd
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	10332000	usd
	us-gaap	Net Income Loss NetIncomeLoss	41332000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	3824000	usd
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	478702000	usd
	us-gaap	Net Income Loss NetIncomeLoss	40348000	usd
	us-gaap	Net Income Loss NetIncomeLoss	41332000	usd
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	5480000	usd
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	5930000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	4800000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	2600000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1633000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1681000	usd
	us-gaap	Issuance Of Stock And Warrants For Services Or Claims IssuanceOfStockAndWarrantsForServicesOrClaims	423000	usd
	us-gaap	Issuance Of Stock And Warrants For Services Or Claims IssuanceOfStockAndWarrantsForServicesOrClaims	317000	usd
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	147849000	usd
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	70280000	usd
	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	146731000	usd
	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	76088000	usd
	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	4637000	usd
	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	2569000	usd
	mbwm	Net Gain Loss From Sale And Valuation Write Down Of Foreclosed Assets NetGainLossFromSaleAndValuationWriteDownOfForeclosedAssets	290000	usd
	mbwm	Net Gain Loss From Sale And Valuation Write Down Of Foreclosed Assets NetGainLossFromSaleAndValuationWriteDownOfForeclosedAssets	-0	usd
	mbwm	Net Gain Loss From Sale And Valuation Write Down Of Former Bank Premises NetGainLossFromSaleAndValuationWriteDownOfFormerBankPremises	78000	usd
	mbwm	Net Gain Loss From Sale And Valuation Write Down Of Former Bank Premises NetGainLossFromSaleAndValuationWriteDownOfFormerBankPremises	-0	usd
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-0	usd
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-377000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1609000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	802000	usd
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	104000	usd
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-106000	usd
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	1169000	usd
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	1486000	usd
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	16679000	usd
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1338000	usd
	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	20113000	usd
	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-2873000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	49349000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	37467000	usd
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	133793000	usd
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	135410000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	57592000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	11641000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	23185000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	10198000	usd
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	290000	usd
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	0	usd
	mbwm	Proceeds From Sale Of Former Bank Premises ProceedsFromSaleOfFormerBankPremises	278000	usd
	mbwm	Proceeds From Sale Of Former Bank Premises ProceedsFromSaleOfFormerBankPremises	0	usd
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	-0	usd
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	3792000	usd
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1357000	usd
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	usd
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	2330000	usd
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	4680000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-168605000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-145325000	usd
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	71902000	usd
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	227531000	usd
	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	173754000	usd
	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	-183553000	usd
	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-7836000	usd
	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	25117000	usd
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	50827000	usd
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	40353000	usd
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	10000000	usd
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	200000000	usd
	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	24000	usd
	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	23000	usd
	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	405000	usd
	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	449000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	11070000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	10332000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	186352000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	218882000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	67096000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	111024000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	130533000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	96772000	usd
CY2024Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	197629000	usd
CY2023Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	207796000	usd
	us-gaap	Interest Paid Net InterestPaidNet	59477000	usd
	us-gaap	Interest Paid Net InterestPaidNet	28038000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	11600000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	13850000	usd
	mbwm	Transfer Of Bank Premises To Other Real Estate Owned TransferOfBankPremisesToOtherRealEstateOwned	0	usd
	mbwm	Transfer Of Bank Premises To Other Real Estate Owned TransferOfBankPremisesToOtherRealEstateOwned	600000	usd
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	0	usd
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	61000	usd
CY2024Q2	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	usd
CY2024Q2	us-gaap	Financing Receivable Unamortized Loan Fee Cost FinancingReceivableUnamortizedLoanFeeCost	2600000	usd
CY2023Q4	us-gaap	Financing Receivable Unamortized Loan Fee Cost FinancingReceivableUnamortizedLoanFeeCost	2400000	usd
	mbwm	Interest Income On Commercial And Mortgage Loans Discontinued Period InterestIncomeOnCommercialAndMortgageLoansDiscontinuedPeriod	P90D
	mbwm	Maximum Delinquency Period For Consumer And Credit Card Loans To Be Charged Off MaximumDelinquencyPeriodForConsumerAndCreditCardLoansToBeChargedOff	P120D
CY2024Q2	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	22500000	usd
CY2023Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	19000000	usd
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	4800000	usd
CY2024Q2	us-gaap	Financing Receivable Accrued Interest After Allowance For Credit Loss FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss	17800000	usd
CY2023Q1	us-gaap	Financing Receivable Accrued Interest After Allowance For Credit Loss FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss	16900000	usd
CY2024Q2	us-gaap	Continuing Involvement With Transferred Financial Assets Principal Amount Outstanding ContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding	1450000000	usd
CY2023Q4	us-gaap	Continuing Involvement With Transferred Financial Assets Principal Amount Outstanding ContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding	1400000000	usd
CY2024Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	715304000	usd
CY2024Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	920000	usd
CY2024Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	68317000	usd
CY2024Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	647907000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	680998000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2206000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	66112000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	617092000	usd
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	42712000	usd
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	220000	usd
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	549977000	usd
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	68097000	usd
CY2024Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	592689000	usd
CY2024Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	68317000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	2729000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	14000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	546018000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	66098000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	548747000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	66112000	usd
CY2024Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	736	pure
CY2024Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	593000000	usd
CY2024Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	68300000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	641	pure
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	549000000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	66100000	usd
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	36407000	usd
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	35906000	usd
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	347975000	usd
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	320540000	usd
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	257961000	usd
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	225847000	usd
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	38930000	usd
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	38136000	usd
CY2024Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	715304000	usd
CY2024Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	647907000	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2024Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	4440000000	usd
CY2023Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	4300000000	usd
	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	134000000	usd
	mbwm	Loans And Leases Receivable Percentage Period Increase Decrease LoansAndLeasesReceivablePercentagePeriodIncreaseDecrease	0.031	pure
CY2024Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	4438245000	usd
CY2024Q2	srt	Financing Receivable Before Allowance For Credit Loss To Total Percent FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent	1	pure
CY2023Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	4303758000	usd
CY2023Q4	srt	Financing Receivable Before Allowance For Credit Loss To Total Percent FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent	1	pure
	mbwm	Loans And Leases Receivable Net Of Deferred Income Increase Decrease Percentage LoansAndLeasesReceivableNetOfDeferredIncomeIncreaseDecreasePercentage	0.031	pure
CY2024Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	4438245000	usd
CY2024Q2	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	usd
CY2023Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	4303758000	usd
CY2023Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	usd
CY2024Q2	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	1638000	usd
CY2024Q2	mbwm	Financing Receivable Nonaccrual With Allowance FinancingReceivableNonaccrualWithAllowance	7491000	usd
CY2024Q2	mbwm	Financing Receivable Nonaccrual Allowance FinancingReceivableNonaccrualAllowance	6146000	usd
CY2024Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	9129000	usd
CY2024Q2	mbwm	Financing Receivable Nonaccrual Allowance FinancingReceivableNonaccrualAllowance	6146000	usd
	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	400000	usd
	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	100000	usd
CY2023Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	2342000	usd
CY2023Q4	mbwm	Financing Receivable Nonaccrual With Allowance FinancingReceivableNonaccrualWithAllowance	1073000	usd
CY2023Q4	mbwm	Financing Receivable Nonaccrual Allowance FinancingReceivableNonaccrualAllowance	241000	usd
CY2023Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3415000	usd
CY2023Q4	mbwm	Financing Receivable Nonaccrual Allowance FinancingReceivableNonaccrualAllowance	241000	usd
CY2024Q2	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	504165000	usd
CY2024Q2	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	1136749000	usd
CY2024Q2	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	847005000	usd
CY2024Q2	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	676264000	usd
CY2024Q2	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	395230000	usd
CY2024Q2	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	142813000	usd
CY2024Q2	mbwm	Financing Receivable Term Loan FinancingReceivableTermLoan	3702226000	usd
CY2024Q2	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	736019000	usd
CY2024Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	4438245000	usd
	us-gaap	Financing Receivable Year One Originated Current Fiscal Year Writeoff FinancingReceivableYearOneOriginatedCurrentFiscalYearWriteoff	0	usd
	us-gaap	Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff	1000	usd
	us-gaap	Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff	18000	usd
	us-gaap	Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff	8000	usd
	us-gaap	Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff	0	usd
	us-gaap	Financing Receivable Originated More Than Five Years Before Current Fiscal Year Writeoff FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff	5000	usd
	mbwm	Financing Receivable Revolving Term Loan Writeoff FinancingReceivableRevolvingTermLoanWriteoff	32000	usd
	us-gaap	Financing Receivable Revolving Writeoff FinancingReceivableRevolvingWriteoff	9000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	41000	usd
	us-gaap	Financing Receivable Revolving Converted To Term Loan During Period FinancingReceivableRevolvingConvertedToTermLoanDuringPeriod	5000000	usd
CY2023Q4	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	1253892000	usd
CY2023Q4	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	965863000	usd
CY2023Q4	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	751371000	usd
CY2023Q4	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	434453000	usd
CY2023Q4	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	89819000	usd
CY2023Q4	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	96332000	usd
CY2023Q4	mbwm	Financing Receivable Term Loan FinancingReceivableTermLoan	3591730000	usd
CY2023Q4	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	712028000	usd
CY2023Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	4303758000	usd
CY2023	us-gaap	Financing Receivable Year One Originated Current Fiscal Year Writeoff FinancingReceivableYearOneOriginatedCurrentFiscalYearWriteoff	0	usd
CY2023	us-gaap	Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff	69000	usd
CY2023	us-gaap	Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff	0	usd
CY2023	us-gaap	Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff	0	usd
CY2023	us-gaap	Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff	0	usd
CY2023	us-gaap	Financing Receivable Originated More Than Five Years Before Current Fiscal Year Writeoff FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff	242000	usd
CY2023	mbwm	Financing Receivable Revolving Term Loan Writeoff FinancingReceivableRevolvingTermLoanWriteoff	311000	usd
CY2023	us-gaap	Financing Receivable Revolving Writeoff FinancingReceivableRevolvingWriteoff	256000	usd
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	567000	usd
CY2023	us-gaap	Financing Receivable Revolving Converted To Term Loan During Period FinancingReceivableRevolvingConvertedToTermLoanDuringPeriod	6400000	usd
	mbwm	Financing Receivable Allowance For Credit Loss Period Increase Decrease From Forecast Changes FinancingReceivableAllowanceForCreditLossPeriodIncreaseDecreaseFromForecastChanges	-2300000	usd
CY2023	mbwm	Financing Receivable Allowance For Credit Loss Period Increase Decrease From Forecast Changes FinancingReceivableAllowanceForCreditLossPeriodIncreaseDecreaseFromForecastChanges	-2000000	usd
CY2024Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	10900000	usd
CY2023Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	5400000	usd
CY2024Q2	mbwm	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment	6300000	usd
CY2023Q4	mbwm	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment	400000	usd
CY2024Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	51638000	usd
CY2024Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	3500000	usd
CY2024Q2	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	26000	usd
CY2024Q2	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	296000	usd
CY2024Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	55408000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	49914000	usd
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	4800000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	41000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	735000	usd
CY2024Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	55408000	usd
CY2023Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	42877000	usd
CY2023Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	2000000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	461000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	305000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	44721000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	42246000	usd
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	2600000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	567000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	442000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	44721000	usd
CY2024Q2	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	14482000	usd
CY2024Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	96960000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	94717000	usd
CY2024Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	46802000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	43789000	usd
CY2024Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	50158000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	50928000	usd
CY2024Q2	us-gaap	Depreciation Depreciation	1500000	usd
CY2023Q2	us-gaap	Depreciation Depreciation	1400000	usd
CY2024Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y2M12D
CY2024Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.065	pure
CY2024Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	4900000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3700000	usd
CY2024Q2	us-gaap	Operating Lease Expense OperatingLeaseExpense	400000	usd
CY2023Q2	us-gaap	Operating Lease Expense OperatingLeaseExpense	500000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	605000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1124000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1068000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	999000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	822000	usd
CY2024Q2	mbwm	Lessee Operating Lease Liability To Be Paid After Year Four LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	1647000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	6265000	usd
CY2024Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1343000	usd
CY2024Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	4922000	usd
CY2024Q2	us-gaap	Deposits Deposits	4150000000	usd
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	246000000	usd
	mbwm	Aggregate Increase Decrease In Percentage Of Deposits AggregateIncreaseDecreaseInPercentageOfDeposits	0.063	pure
CY2024Q2	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	1119888000	usd
CY2024Q2	mbwm	Percentage Of Non Interest Bearing Domestic Deposits To Deposits Demand PercentageOfNonInterestBearingDomesticDepositsToDepositsDemand	0.27	pure
CY2023Q4	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	1247640000	usd
CY2023Q4	mbwm	Percentage Of Non Interest Bearing Domestic Deposits To Deposits Demand PercentageOfNonInterestBearingDomesticDepositsToDepositsDemand	0.321	pure
	mbwm	Percentage Of Increase Decrease In Non Interest Bearing Demand Deposits PercentageOfIncreaseDecreaseInNonInterestBearingDemandDeposits	-0.102	pure
CY2024Q2	us-gaap	Interest Bearing Domestic Deposit Checking InterestBearingDomesticDepositChecking	641923000	usd
CY2024Q2	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Checking PercentageOfInterestBearingDomesticDepositsToDepositsChecking	0.155	pure
CY2023Q4	us-gaap	Interest Bearing Domestic Deposit Checking InterestBearingDomesticDepositChecking	635790000	usd
CY2023Q4	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Checking PercentageOfInterestBearingDomesticDepositsToDepositsChecking	0.163	pure
	mbwm	Percentage Of Increase Decrease Of Interest Bearing Checking Deposits PercentageOfIncreaseDecreaseOfInterestBearingCheckingDeposits	0.01	pure
CY2024Q2	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	1268759000	usd
CY2024Q2	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Money Market PercentageOfInterestBearingDomesticDepositsToDepositsMoneyMarket	0.306	pure
CY2023Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	957434000	usd
CY2023Q4	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Money Market PercentageOfInterestBearingDomesticDepositsToDepositsMoneyMarket	0.245	pure
	mbwm	Percentage Of Increase Decrease In Money Market Deposits PercentageOfIncreaseDecreaseInMoneyMarketDeposits	0.325	pure
CY2024Q2	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	246614000	usd
CY2024Q2	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Savings PercentageOfInterestBearingDomesticDepositsToDepositsSavings	0.059	pure
CY2023Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	262566000	usd
CY2023Q4	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Savings PercentageOfInterestBearingDomesticDepositsToDepositsSavings	0.067	pure
	mbwm	Percentage Of Increase Or Decrease Of Savings Deposits PercentageOfIncreaseOrDecreaseOfSavingsDeposits	-0.061	pure
CY2024Q2	mbwm	Domestic Time Deposits Less Than100000 DomesticTimeDepositsLessThan100000	198147000	usd
CY2024Q2	mbwm	Percentage Of Domestic Time Deposits Under100000 PercentageOfDomesticTimeDepositsUnder100000	0.048	pure
CY2023Q4	mbwm	Domestic Time Deposits Less Than100000 DomesticTimeDepositsLessThan100000	175741000	usd
CY2023Q4	mbwm	Percentage Of Domestic Time Deposits Under100000 PercentageOfDomesticTimeDepositsUnder100000	0.045	pure
	mbwm	Percentage Of Increase Decrease In Domestic Time Deposits Under100000 PercentageOfIncreaseDecreaseInDomesticTimeDepositsUnder100000	0.127	pure
CY2024Q2	mbwm	Domestic Time Deposits100000 Or More DomesticTimeDeposits100000OrMore	518090000	usd
CY2024Q2	mbwm	Percentage Of Domestic Time Deposits100000 And Over PercentageOfDomesticTimeDeposits100000AndOver	0.125	pure
CY2023Q4	mbwm	Domestic Time Deposits100000 Or More DomesticTimeDeposits100000OrMore	453366000	usd
CY2023Q4	mbwm	Percentage Of Domestic Time Deposits100000 And Over PercentageOfDomesticTimeDeposits100000AndOver	0.116	pure
	mbwm	Percentage Of Increase Decrease In Domestic Time Deposits100000 And Over PercentageOfIncreaseDecreaseInDomesticTimeDeposits100000AndOver	0.143	pure
CY2024Q2	mbwm	Aggregate Local Deposit Liabilities AggregateLocalDepositLiabilities	3993421000	usd
CY2024Q2	mbwm	Aggregate Percentage Of Local Deposits AggregatePercentageOfLocalDeposits	0.963	pure
CY2023Q4	mbwm	Aggregate Local Deposit Liabilities AggregateLocalDepositLiabilities	3732537000	usd
CY2023Q4	mbwm	Aggregate Percentage Of Local Deposits AggregatePercentageOfLocalDeposits	0.957	pure
	mbwm	Aggregate Percentage Increase Decrease In Local Deposits AggregatePercentageIncreaseDecreaseInLocalDeposits	0.07	pure
CY2024Q2	mbwm	Out Of Area Time Deposits100000 And Over OutOfAreaTimeDeposits100000AndOver	153153000	usd
CY2024Q2	mbwm	Percentage Of Out Of Area Time Deposits100000 And Over PercentageOfOutOfAreaTimeDeposits100000AndOver	0.037	pure
CY2023Q4	mbwm	Out Of Area Time Deposits100000 And Over OutOfAreaTimeDeposits100000AndOver	168381000	usd
CY2023Q4	mbwm	Percentage Of Out Of Area Time Deposits100000 And Over PercentageOfOutOfAreaTimeDeposits100000AndOver	0.043	pure
	mbwm	Percentage Of Increase Decrease In Out Of Area Time100000 And Over PercentageOfIncreaseDecreaseInOutOfAreaTime100000AndOver	-0.09	pure
CY2024Q2	us-gaap	Deposits Deposits	4146574000	usd
CY2024Q2	mbwm	Aggregate Percentage Of Deposits AggregatePercentageOfDeposits	1	pure
CY2023Q4	us-gaap	Deposits Deposits	3900918000	usd
CY2023Q4	mbwm	Aggregate Percentage Of Deposits AggregatePercentageOfDeposits	1	pure
	mbwm	Aggregate Increase Decrease In Percentage Of Deposits AggregateIncreaseDecreaseInPercentageOfDeposits	0.063	pure
	us-gaap	Schedule Of Repurchase Agreements ScheduleOfRepurchaseAgreements	<table border="0" cellpadding="0" cellspacing="0" class="finTable" style="margin-right: 5%; margin-left: 18pt; width: 95%; font-size: 10pt; font-family: Times New Roman; text-indent: 0px;"><tbody><tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"><td style="font-family: Times New Roman; font-size: 10pt; width: 64%;"> </td><td style="font-family: Times New Roman; font-size: 10pt; width: 1%;"> </td><td colspan="2" style="text-align: center; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; width: 1%;"> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:center;margin:0pt;"><em style="font: inherit;">Six Months Ended</em></p> </td><td style="font-family: Times New Roman; font-size: 10pt; width: 1%;"> </td><td style="font-family: Times New Roman; font-size: 10pt; width: 1%;"> </td><td colspan="2" style="text-align: center; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; width: 1%;"> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:center;margin:0pt;"><em style="font: inherit;">Twelve Months Ended</em></p> </td><td style="font-family: Times New Roman; font-size: 10pt; width: 1%;"><em style="font: inherit;"> </em></td></tr> <tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"><td style="font-family: Times New Roman; font-size: 10pt; width: 64%; padding: 0; margin: 0"> <p style="margin: 0pt; font-size: 10pt; font-family: "Times New Roman";">(Dollars in thousands)</p> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; padding: 0; margin: 0"> </td><td colspan="2" rowspan="1" style="width: 1%; font-family: "Times New Roman"; font-size: 10pt; padding: 0px; margin: 0px; text-align: center; border-bottom: 1px solid rgb(0, 0, 0);"><em style="font: inherit;">June 30, 2024</em></td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; padding: 0; margin: 0"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; padding: 0; margin: 0"> </td><td colspan="3" rowspan="1" style="width: 1%; font-family: "Times New Roman"; font-size: 10pt; padding: 0px; margin: 0px; text-align: center; border-bottom: 1px solid rgb(0, 0, 0);"><em style="font: inherit;"><em style="font: inherit;">December 31, 2023</em></em></td></tr> <tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"><td style="width: 64%;"> </td><td style="width: 1%;"> </td><td style="width: 1%;"> </td><td style="width: 15%;"> </td><td style="width: 1%;"> </td><td style="width: 1%;"> </td><td style="width: 1%;"> </td><td style="width: 15%;"> </td><td style="width: 1%;"> </td></tr> <tr style="background-color: rgb(204, 238, 255); vertical-align: bottom"><td style="font-family: Times New Roman; font-size: 10pt; width: 64%;"> <p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; margin: 0pt;">Outstanding balance at end of period</p> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">$</td><td style="width: 15%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">221,898</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">$</td><td style="width: 15%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">229,734</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"><em style="font: inherit;"> </em></td></tr> <tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"><td style="font-family: Times New Roman; font-size: 10pt; width: 64%;"> <p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; margin: 0pt;">Average interest rate at end of period</p> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 15%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">3.43</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">%</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 15%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">3.17</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"><em style="font: inherit;">%</em></td></tr> <tr style="background-color: rgb(204, 238, 255); vertical-align: bottom"><td style="width: 64%;"> </td><td style="width: 1%;"> </td><td style="width: 1%;"> </td><td style="width: 15%;"> </td><td style="width: 1%;"> </td><td style="width: 1%;"> </td><td style="width: 1%;"> </td><td style="width: 15%;"> </td><td style="width: 1%;"> </td></tr> <tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"><td style="font-family: Times New Roman; font-size: 10pt; width: 64%;"> <p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; margin: 0pt;">Average daily balance during the period</p> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">$</td><td style="width: 15%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">221,103</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">$</td><td style="width: 15%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">204,334</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"><em style="font: inherit;"> </em></td></tr> <tr style="background-color: rgb(204, 238, 255); vertical-align: bottom"><td style="font-family: Times New Roman; font-size: 10pt; width: 64%;"> <p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; margin: 0pt;">Average interest rate during the period</p> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 15%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">3.09</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">%</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 15%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">1.33</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"><em style="font: inherit;">%</em></td></tr> <tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"><td style="width: 64%;"> </td><td style="width: 1%;"> </td><td style="width: 1%;"> </td><td style="width: 15%;"> </td><td style="width: 1%;"> </td><td style="width: 1%;"> </td><td style="width: 1%;"> </td><td style="width: 15%;"> </td><td style="width: 1%;"> </td></tr> <tr style="background-color: rgb(204, 238, 255); vertical-align: bottom"><td style="font-family: Times New Roman; font-size: 10pt; width: 64%;"> <p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; margin: 0pt;">Maximum daily balance during the period</p> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">$</td><td style="width: 15%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">258,253</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">$</td><td style="width: 15%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">269,324</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"><em style="font: inherit;"> </em></td></tr> </tbody></table>
CY2024Q2	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	221898000	usd
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	229734000	usd
	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	221103000	usd
CY2023	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	204334000	usd
	us-gaap	Shortterm Debt Maximum Amount Outstanding During Period ShorttermDebtMaximumAmountOutstandingDuringPeriod	258253000	usd
CY2023	us-gaap	Shortterm Debt Maximum Amount Outstanding During Period ShorttermDebtMaximumAmountOutstandingDuringPeriod	269324000	usd
CY2024Q2	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	1010000000.00	usd
CY2024Q2	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	576000000	usd
CY2024Q2	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Amount Liability FairValueDisclosureOffbalanceSheetRisksAmountLiability	2056152000	usd
CY2023Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Amount Liability FairValueDisclosureOffbalanceSheetRisksAmountLiability	2113504000	usd
CY2024Q2	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	22500000	usd
CY2023Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	19000000	usd
CY2024Q2	mbwm	Preferred Securities Of Subsidiary Trust PreferredSecuritiesOfSubsidiaryTrust	47900000	usd
CY2023Q4	mbwm	Preferred Securities Of Subsidiary Trust PreferredSecuritiesOfSubsidiaryTrust	47600000	usd
	mbwm	Maximum Restricted Core Element Allowed In Tier One Capital Percent MaximumRestrictedCoreElementAllowedInTierOneCapitalPercent	0.25	pure
CY2009Q4	mbwm	Maximum Level Of Consolidated Aggregate Assets Allowing For Inclusion Of Trust Preferred Securities In Tier One Capital MaximumLevelOfConsolidatedAggregateAssetsAllowingForInclusionOfTrustPreferredSecuritiesInTierOneCapital	15000000000	usd
CY2024Q2	mbwm	Trust Preferred Securities Included In Tier One Capital TrustPreferredSecuritiesIncludedInTierOneCapital	47900000	usd
CY2023Q4	mbwm	Trust Preferred Securities Included In Tier One Capital TrustPreferredSecuritiesIncludedInTierOneCapital	47600000	usd
CY2024Q2	mbwm	Capital Conservation Buffer CapitalConservationBuffer	0.025	pure
CY2024Q2	mbwm	Common Equity Tier1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets CommonEquityTier1RiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.07	pure
CY2024Q2	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.085	pure
CY2024Q2	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.105	pure
CY2024Q2	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	6800000	usd
CY2021Q2	srt	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	20000000	usd
	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0
CY2024Q2	ecd	Trd Arr Ind Title TrdArrIndTitle	Director
CY2024Q2	ecd	Trd Arr Ind Name TrdArrIndName	Robert B. Kaminski, Jr.
CY2024Q2	ecd	Trd Arr Adoption Date TrdArrAdoptionDate	April 2, 2024
CY2024Q2	ecd	Trd Arr Securities Agg Avail Amt TrdArrSecuritiesAggAvailAmt	4500

Files In Submission

Name	View Source	Status
mbwm-20240630_lab.xml	Edgar Link	unprocessable
0001437749-24-024367-index-headers.html	Edgar Link	pending
0001437749-24-024367-index.html	Edgar Link	pending
0001437749-24-024367.txt	Edgar Link	pending
0001437749-24-024367-xbrl.zip	Edgar Link	pending
ex_684155.htm	Edgar Link	pending
ex_684156.htm	Edgar Link	pending
ex_684157.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
mbwm-20240630.xsd	Edgar Link	pending
mbwm20240630_10q.htm	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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R3.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
mbwm-20240630_cal.xml	Edgar Link	unprocessable
mbwm-20240630_def.xml	Edgar Link	unprocessable
mbwm-20240630_pre.xml	Edgar Link	unprocessable
mbwm20240630_10q_htm.xml	Edgar Link	completed
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$MBWM
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2024 Q3 Form 10-Q Financial Statement

#000143774924024367 Filed on August 02, 2024

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$MBWM Mercantile Bank Corp Stock $mbwm

2024 Q3 Form 10-Q Financial Statement

#000143774924024367 Filed on August 02, 2024

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$MBWM
Mercantile Bank Corp Stock $mbwm