$QCRH
QCR HOLDINGS INC Stock $qcrh

$qcrh Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-Q Financial Statement

#000155837021014811 Filed on November 05, 2021

Income Statement

Concept	2021 Q4	2021 Q3	2021 Q2
Revenue		$51.67M	$48.90M
YoY Change		1.53%	0.52%
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	$1.800M	$1.900M	$1.900M
YoY Change	0.0%	5.56%	-5.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense		$5.438M	$5.387M
YoY Change		-13.81%	-30.06%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$33.31M	$39.49M	$27.14M
YoY Change	49.51%	84.9%	64.1%
Income Tax	$6.300M	$7.929M	$4.788M
% Of Pretax Income	18.91%	20.08%	17.64%
Net Earnings	$27.01M	$31.57M	$22.35M
YoY Change	47.83%	81.99%	62.67%
Net Earnings / Revenue		61.09%	45.7%
Basic Earnings Per Share		$2.02	$1.41
Diluted Earnings Per Share	$1.731M	$1.99	$1.39
COMMON SHARES
Basic Shares Outstanding	15.60M	15.64M	15.81M
Diluted Shares Outstanding		15.87M	16.05M

Balance Sheet

Concept	2021 Q4	2021 Q3	2021 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$37.49M	$57.31M	$55.60M
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	$78.53M	$74.99M	$74.77M
YoY Change	8.03%	4.16%	2.54%
Goodwill	$74.07M	$74.07M	$74.07M
YoY Change	0.0%	0.0%	-0.25%
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	$6.096B	$6.015B	$5.805B
YoY Change	6.86%	2.56%	3.58%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$3.800M	$1.600M	$7.070M
YoY Change	-30.02%	-94.74%	-94.34%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$3.800M	$1.600M	$7.100M
YoY Change	-29.63%	-94.74%	-94.31%
LONG-TERM LIABILITIES
Long-Term Debt	$152.0M	$151.9M	$151.8M
YoY Change	-3.0%	-2.94%	42.67%
Other Long-Term Liabilities	$325.5M	$309.4M	$286.8M
YoY Change	-2.84%	-21.21%	-11.12%
Total Long-Term Liabilities	$477.5M	$461.3M	$438.6M
YoY Change	-2.89%	-16.01%	2.21%
TOTAL LIABILITIES
Total Short-Term Liabilities	$3.800M	$1.600M	$7.100M
Total Long-Term Liabilities	$477.5M	$461.3M	$438.6M
Total Liabilities	$5.419B	$5.365B	$5.175B
YoY Change	6.02%	1.37%	2.49%
SHAREHOLDERS EQUITY
Retained Earnings	$386.1M	$360.0M	$335.4M
YoY Change	28.35%	26.99%	25.59%
Common Stock	$15.61M	$15.59M	$15.76M
YoY Change	-1.22%	-1.28%	-0.17%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$677.0M	$649.8M	$630.5M
YoY Change
Total Liabilities & Shareholders Equity	$6.096B	$6.015B	$5.805B
YoY Change	6.86%	2.56%	3.58%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2021 Q2
OPERATING ACTIVITIES
Net Income	$27.01M	$31.57M	$22.35M
YoY Change	47.83%	81.99%	62.67%
Depreciation, Depletion And Amortization	$1.800M	$1.900M	$1.900M
YoY Change	0.0%	5.56%	-5.0%
Cash From Operating Activities	$23.90M	$31.60M	$21.60M
YoY Change	-239.77%	-64.89%	-33.94%
INVESTING ACTIVITIES
Capital Expenditures	-$6.100M	-$3.100M	-$3.000M
YoY Change	205.0%	520.0%	200.0%
Acquisitions
YoY Change
Other Investing Activities	-$75.20M	-$184.0M	-$103.9M
YoY Change	-155.58%	-34.22%	-75.44%
Cash From Investing Activities	-$81.30M	-$187.1M	-$106.9M
YoY Change	-160.99%	-33.23%	-74.79%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	37.50M	157.3M	62.10M
YoY Change	-130.29%	-7.8%	-79.98%
NET CHANGE
Cash From Operating Activities	23.90M	31.60M	21.60M
Cash From Investing Activities	-81.30M	-187.1M	-106.9M
Cash From Financing Activities	37.50M	157.3M	62.10M
Net Change In Cash	-19.90M	1.800M	-23.20M
YoY Change	161.84%	-109.18%	-71.43%
FREE CASH FLOW
Cash From Operating Activities	$23.90M	$31.60M	$21.60M
Capital Expenditures	-$6.100M	-$3.100M	-$3.000M
Free Cash Flow	$30.00M	$34.70M	$24.60M
YoY Change	-298.68%	-61.66%	-27.0%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2021Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
	dei	Entity Central Index Key EntityCentralIndexKey	0000906465
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
CY2020Q3	qcrh	Restructured Loans Nonaccrual Status Number RestructuredLoansNonaccrualStatusNumber	0
CY2020Q3	qcrh	Restructured Loans Nonaccrual Status Number RestructuredLoansNonaccrualStatusNumber	0
CY2021Q3	us-gaap	Preferred Stock Value PreferredStockValue
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2021Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	15590428
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	15805711
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2021-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	0-22208
	dei	Entity Registrant Name EntityRegistrantName	QCR HOLDINGS, INC.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	42-1397595
	dei	Entity Address Address Line1 EntityAddressAddressLine1	3551 7th Street
	dei	Entity Address City Or Town EntityAddressCityOrTown	Moline
	dei	Entity Address State Or Province EntityAddressStateOrProvince	IL
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	61265
	dei	City Area Code CityAreaCode	309
	dei	Local Phone Number LocalPhoneNumber	736-3580
	dei	Security12b Title Security12bTitle	Common Stock, $1.00 Par Value
	dei	Trading Symbol TradingSymbol	QCRH
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2021Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	15596681
CY2021Q3	us-gaap	Cash And Due From Banks CashAndDueFromBanks	57310000
CY2020Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	61329000
CY2021Q3	us-gaap	Federal Funds Sold FederalFundsSold	6985000
CY2020Q4	us-gaap	Federal Funds Sold FederalFundsSold	9080000
CY2021Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	63841000
CY2020Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	86596000
CY2021Q3	qcrh	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment Net Of Allowance For Credit Losses HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairmentNetOfAllowanceForCreditLosses	484003000
CY2020Q4	qcrh	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment Net Of Allowance For Credit Losses HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairmentNetOfAllowanceForCreditLosses	476165000
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	344716000
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	361966000
CY2021Q3	us-gaap	Debt Securities DebtSecurities	828719000
CY2020Q4	us-gaap	Debt Securities DebtSecurities	838131000
CY2021Q3	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	3452000
CY2020Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	3758000
CY2021Q3	qcrh	Loans And Leases Receivable Held For Investment LoansAndLeasesReceivableHeldForInvestment	4596278000
CY2020Q4	qcrh	Loans And Leases Receivable Held For Investment LoansAndLeasesReceivableHeldForInvestment	4247371000
CY2021Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4599730000
CY2021Q3	us-gaap	Deposits Deposits	4871828000
CY2020Q4	us-gaap	Deposits Deposits	4599137000
CY2021Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	1600000
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	5430000
CY2021Q3	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	30000000
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	15000000
CY2021Q3	us-gaap	Subordinated Debt SubordinatedDebt	113811000
CY2020Q4	us-gaap	Subordinated Debt SubordinatedDebt	118691000
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4251129000
CY2021Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	80670000
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	84376000
CY2021Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	4519060000
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	4166753000
CY2021Q3	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	61955000
CY2020Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	60586000
CY2021Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	74993000
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	72693000
CY2021Q3	us-gaap	Restricted Investments RestrictedInvestments	19936000
CY2020Q4	us-gaap	Restricted Investments RestrictedInvestments	18103000
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	20000
CY2021Q3	us-gaap	Goodwill Goodwill	74066000
CY2020Q4	us-gaap	Goodwill Goodwill	74066000
CY2021Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	9857000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	11381000
CY2021Q3	us-gaap	Derivative Assets DerivativeAssets	198393000
CY2020Q4	us-gaap	Derivative Assets DerivativeAssets	222757000
CY2021Q3	us-gaap	Other Assets OtherAssets	99393000
CY2020Q4	us-gaap	Other Assets OtherAssets	61302000
CY2021Q3	us-gaap	Assets Assets	6014508000
CY2020Q4	us-gaap	Assets Assets	5682797000
CY2021Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1342273000
CY2020Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1145378000
CY2021Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	3529555000
CY2020Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	3453759000
CY2021Q3	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	38103000
CY2020Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	37993000
CY2021Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	201450000
CY2020Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	229270000
CY2021Q3	us-gaap	Other Liabilities OtherLiabilities	107902000
CY2020Q4	us-gaap	Other Liabilities OtherLiabilities	83483000
CY2021Q3	us-gaap	Liabilities Liabilities	5364694000
CY2020Q4	us-gaap	Liabilities Liabilities	5089004000
CY2021Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2021Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	250000
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	250000
CY2021Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2021Q3	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	4160000
CY2020Q3	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	3842000
CY2021Q3	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	39000
CY2020Q3	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	92000
CY2021Q3	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	262000
CY2020Q3	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	249000
CY2021Q3	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	1000
CY2020Q3	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	1000
CY2021Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	51667000
CY2020Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	50890000
CY2021Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	3273000
CY2020Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	4484000
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2021Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
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CY2021Q3	us-gaap	Common Stock Value CommonStockValue	15590000
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	15806000
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CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	275807000
CY2021Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	360003000
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	300804000
CY2021Q3	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	5825000
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	9008000
CY2021Q3	us-gaap	Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax AociLossCashFlowHedgeCumulativeGainLossAfterTax	-4568000
CY2020Q4	us-gaap	Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax AociLossCashFlowHedgeCumulativeGainLossAfterTax	-7632000
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	649814000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	593793000
CY2021Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6014508000
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5682797000
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CY2020Q3	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	44768000
CY2021Q3	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	2347000
CY2020Q3	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	1938000
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CY2020Q3	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	11000
CY2021Q3	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	41000
CY2020Q3	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	211000
CY2021Q3	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	1554000
CY2020Q3	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	1031000
CY2021Q3	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	569000
CY2020Q3	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	572000
CY2021Q3	us-gaap	Interest Expense InterestExpense	5438000
CY2020Q3	us-gaap	Interest Expense InterestExpense	6309000
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CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	44581000
CY2020Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	20342000
CY2021Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	46229000
CY2020Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	24239000
CY2021Q3	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	954000
CY2020Q3	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1370000
CY2021Q3	qcrh	Swap Fee Income SwapFeeIncome	24885000
CY2020Q3	qcrh	Swap Fee Income SwapFeeIncome	26688000
CY2020Q3	us-gaap	Debt Securities Gain Loss DebtSecuritiesGainLoss	1802000
CY2021Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	446000
CY2020Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	502000
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CY2020Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	1482000
CY2021Q3	us-gaap	Noninterest Income NoninterestIncome	34652000
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	37959000
CY2021Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	28207000
CY2020Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	25999000
CY2021Q3	us-gaap	Equipment Expense EquipmentExpense	4122000
CY2020Q3	us-gaap	Equipment Expense EquipmentExpense	3807000
CY2021Q3	qcrh	Professional And Data Processing Fees ProfessionalAndDataProcessingFees	3568000
CY2020Q3	qcrh	Professional And Data Processing Fees ProfessionalAndDataProcessingFees	3758000
CY2020Q3	qcrh	Disposal Group Including Discontinued Operation Cost Of Disposal DisposalGroupIncludingDiscontinuedOperationCostOfDisposal	192000
CY2021Q3	qcrh	Fdic And Other Insurance FDICAndOtherInsurance	1108000
CY2020Q3	qcrh	Fdic And Other Insurance FDICAndOtherInsurance	1301000
CY2021Q3	qcrh	Loan Lease Expense LoanLeaseExpense	308000
CY2020Q3	qcrh	Loan Lease Expense LoanLeaseExpense	403000
CY2021Q3	qcrh	Expense Income On Operations Of Other Real Estate ExpenseIncomeOnOperationsOfOtherRealEstate	-1346000
CY2020Q3	qcrh	Expense Income On Operations Of Other Real Estate ExpenseIncomeOnOperationsOfOtherRealEstate	16000
CY2021Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	1095000
CY2020Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	750000
CY2021Q3	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	525000
CY2020Q3	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	488000
CY2020Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1874000
CY2021Q3	qcrh	Correspondent Banking Expense CorrespondentBankingExpense	201000
CY2020Q3	qcrh	Correspondent Banking Expense CorrespondentBankingExpense	205000
CY2021Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	508000
CY2020Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	531000
CY2020Q3	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	-305000
CY2021Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3091000
CY2020Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1209000
CY2021Q3	us-gaap	Noninterest Expense NoninterestExpense	41387000
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	40838000
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	39494000
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	21360000
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7929000
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4016000
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	31565000
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	17344000
	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	1715000
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.02
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.10
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.99
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.09
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15635123
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15767152
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15869798
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15923578
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.06
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.06
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	128639000
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	130542000
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	6521000
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	5714000
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	12146000
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	10865000
	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	110000
	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	587000
	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	718000
	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	795000
	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	1000
	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	19000
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	148135000
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	148522000
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	9935000
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	19457000
	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	4000
	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	81000
	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	66000
	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	1007000
	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	4718000
	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	3019000
	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	1692000
	us-gaap	Interest Expense InterestExpense	16415000
	us-gaap	Interest Expense InterestExpense	25279000
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	131720000
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	123243000
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	6713000
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	48624000
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	125007000
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	74619000
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3475000
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3218000
	qcrh	Swap Fee Income SwapFeeIncome	48010000
	qcrh	Swap Fee Income SwapFeeIncome	53419000
	us-gaap	Debt Securities Gain Loss DebtSecuritiesGainLoss	-88000
	us-gaap	Debt Securities Gain Loss DebtSecuritiesGainLoss	1867000
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1368000
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1443000
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	4796000
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	3345000
	us-gaap	Noninterest Income NoninterestIncome	77437000
	us-gaap	Noninterest Income NoninterestIncome	81781000
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	76098000
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	65822000
	us-gaap	Equipment Expense EquipmentExpense	12195000
	us-gaap	Equipment Expense EquipmentExpense	11587000
	qcrh	Professional And Data Processing Fees ProfessionalAndDataProcessingFees	10713000
	qcrh	Professional And Data Processing Fees ProfessionalAndDataProcessingFees	10773000
	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	189000
	qcrh	Disposal Group Including Discontinued Operation Cost Of Disposal DisposalGroupIncludingDiscontinuedOperationCostOfDisposal	8000
	qcrh	Disposal Group Including Discontinued Operation Cost Of Disposal DisposalGroupIncludingDiscontinuedOperationCostOfDisposal	626000
	qcrh	Fdic And Other Insurance FDICAndOtherInsurance	3159000
	qcrh	Fdic And Other Insurance FDICAndOtherInsurance	2892000
	qcrh	Loan Lease Expense LoanLeaseExpense	1065000
	qcrh	Loan Lease Expense LoanLeaseExpense	970000
	qcrh	Expense Income On Operations Of Other Real Estate ExpenseIncomeOnOperationsOfOtherRealEstate	-1420000
	qcrh	Expense Income On Operations Of Other Real Estate ExpenseIncomeOnOperationsOfOtherRealEstate	-303000
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	2575000
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	1984000
	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	1620000
	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	1493000
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-2450000
	qcrh	Correspondent Banking Expense CorrespondentBankingExpense	599000
	qcrh	Correspondent Banking Expense CorrespondentBankingExpense	633000
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1524000
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1628000
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	500000
	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	-305000
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	6154000
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3842000
	us-gaap	Noninterest Expense NoninterestExpense	114290000
	us-gaap	Noninterest Expense NoninterestExpense	105391000
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	88154000
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	51009000
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16258000
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8698000
	us-gaap	Net Income Loss NetIncomeLoss	71896000
	us-gaap	Net Income Loss NetIncomeLoss	42311000
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.54
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.68
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.48
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.65
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15829124
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15770335
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	16058420
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15945832
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.18
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.18
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	31565000
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	17344000
CY2021Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	-3194000
CY2020Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	585000
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1802000
CY2021Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	-3194000
CY2020Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	-1217000
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-342000
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	445000
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-181000
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	149000
CY2021Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	-161000
CY2020Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	296000
CY2021Q3	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-3355000
CY2020Q3	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-921000
CY2021Q3	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-809000
CY2020Q3	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-307000
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2546000
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-614000
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	29019000
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	16730000
	us-gaap	Net Income Loss NetIncomeLoss	71896000
	us-gaap	Net Income Loss NetIncomeLoss	42311000
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	-4290000
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	8467000
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-88000
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1867000
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	-4202000
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	6600000
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	3383000
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-7903000
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-495000
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-384000
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	3878000
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	-7519000
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-324000
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-919000
	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-206000
	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-236000
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-118000
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-683000
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	71778000
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	41628000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	593793000
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	17982000
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1751000
CY2021Q1	us-gaap	Dividends Common Stock DividendsCommonStock	949000
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	841000
CY2021Q1	qcrh	Issuance Of Common Stock Under Employee Benefit Plans IssuanceOfCommonStockUnderEmployeeBenefitPlans	-260000
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	608719000
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	22349000
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4179000
CY2021Q2	us-gaap	Dividends Common Stock DividendsCommonStock	951000
CY2021Q2	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	100000
CY2021Q2	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	4800000
CY2021Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	520000
CY2021Q2	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	460000
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	630476000
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	31565000
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2546000
CY2021Q3	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	193153
CY2021Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	9367000
CY2021Q3	us-gaap	Dividends Common Stock DividendsCommonStock	946000
CY2021Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	504000
CY2021Q3	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	128000
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	649814000
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	535351000
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	11228000
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3691000
CY2020Q1	us-gaap	Dividends Common Stock DividendsCommonStock	942000
CY2020Q1	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	100932
CY2020Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	3780000
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	641000
CY2020Q1	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	332000
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	539139000
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	13739000
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3622000
CY2020Q2	us-gaap	Dividends Common Stock DividendsCommonStock	945000
CY2020Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	423000
CY2020Q2	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	42000
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	556020000
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	17344000
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-614000
CY2020Q3	us-gaap	Dividends Common Stock DividendsCommonStock	945000
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	472000
CY2020Q3	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	336000
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	572613000
	us-gaap	Profit Loss ProfitLoss	71896000
	us-gaap	Profit Loss ProfitLoss	42311000
	us-gaap	Depreciation Depreciation	4087000
	us-gaap	Depreciation Depreciation	4006000
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	6713000
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	48624000
	us-gaap	Share Based Compensation ShareBasedCompensation	1865000
	us-gaap	Share Based Compensation ShareBasedCompensation	1536000
	us-gaap	Increase Decrease In Deferred Compensation IncreaseDecreaseInDeferredCompensation	3288000
	us-gaap	Increase Decrease In Deferred Compensation IncreaseDecreaseInDeferredCompensation	2660000
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	1754000
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	298000
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1506000
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-728000
	qcrh	Caplet Amortization CapletAmortization	495000
	qcrh	Caplet Amortization CapletAmortization	383000
	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	74000
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-88000
	us-gaap	Gain Loss On Investments GainLossOnInvestments	1867000
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	157392000
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	172282000
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	161173000
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	170362000
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3475000
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3218000
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-2450000
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-1457000
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	13000
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1524000
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1628000
	qcrh	Accretion Fair Value Adjustment Net AccretionFairValueAdjustmentNet	1251000
	qcrh	Accretion Fair Value Adjustment Net AccretionFairValueAdjustmentNet	2194000
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1369000
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1443000
	us-gaap	Gain Or Loss On Sale Of Stock In Subsidiary GainOrLossOnSaleOfStockInSubsidiary	-305000
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	500000
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	37630000
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	8351000
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	13161000
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	43489000
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	64308000
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	129316000
	us-gaap	Increase Decrease In Federal Funds Sold IncreaseDecreaseInFederalFundsSold	2095000
	us-gaap	Increase Decrease In Federal Funds Sold IncreaseDecreaseInFederalFundsSold	9270000
	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	22755000
	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	-154247000
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	4592000
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	4353000
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	151702000
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	255500000
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	81000000
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	38461000
	qcrh	Paydowns Paydowns	50177000
	qcrh	Paydowns Paydowns	33870000
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	23874000
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	28579000
	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	4280000
	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	4600000
	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	2447000
	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	8843000
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	10999000
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	353616000
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	555315000
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7866000
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2250000
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	22000
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	94000
	qcrh	Net Cash Transferred In Sale Of Subsidiary NetCashTransferredInSaleOfSubsidiary	349000
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-330502000
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-837792000
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	272691000
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	731374000
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-3830000
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	17007000
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	125000000
	qcrh	Payment Or Collection Of Calls And Maturities PaymentOrCollectionOfCallsAndMaturities	81600000
	qcrh	Payments For Proceeds From Short Term And Over Night Advances PaymentsForProceedsFromShortTermAndOverNightAdvances	-15000000
	qcrh	Payments For Proceeds From Short Term And Over Night Advances PaymentsForProceedsFromShortTermAndOverNightAdvances	109300000
	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	55274000
	qcrh	Prepayments Of Subordinated Notes PrepaymentsOfSubordinatedNotes	-5000000
	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	50000000
	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	2847000
	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	2831000
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	328000
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1199000
	qcrh	Payments For Repurchase And Cancellation Of Shares PaymentsForRepurchaseAndCancellationOfShares	-14167000
	qcrh	Payments For Repurchase And Cancellation Of Shares PaymentsForRepurchaseAndCancellationOfShares	-3780000
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	262175000
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	701154000
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-4019000
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-7322000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	61329000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	76254000
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	57310000
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	68932000
	us-gaap	Interest Paid Net InterestPaidNet	18617000
	us-gaap	Interest Paid Net InterestPaidNet	26920000
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-36987000
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-16713000
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	118000
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	683000
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	2812000
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	51000
	qcrh	Change In Due To Broker Noncash ChangeInDueToBrokerNoncash	8550000
	qcrh	Decrease Increase In Fair Market Value Of Interest Rate Swap Assets And Liabilities DecreaseIncreaseInFairMarketValueOfInterestRateSwapAssetsAndLiabilities	25503000
	qcrh	Decrease Increase In Fair Market Value Of Interest Rate Swap Assets And Liabilities DecreaseIncreaseInFairMarketValueOfInterestRateSwapAssetsAndLiabilities	-151398000
	qcrh	Change In Dividends Payable Noncash ChangeInDividendsPayableNoncash	946000
	qcrh	Change In Dividends Payable Noncash ChangeInDividendsPayableNoncash	945000
	qcrh	Non Cash Consideration Received On Sale Of Business NonCashConsiderationReceivedOnSaleOfBusiness	1328000
CY2021Q3	qcrh	Number Of Subsidiaries NumberOfSubsidiaries	4
CY2021Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	84376000
	qcrh	Allowance For Credit Losses On Loans Number Of Portfolio Segments AllowanceForCreditLossesOnLoansNumberOfPortfolioSegments	8
	qcrh	Maximum Number Of Years Borrowers Assigned To Special Mention Class MaximumNumberOfYearsBorrowersAssignedToSpecialMentionClass	P1Y
CY2021Q3	qcrh	Lending Threshold Requiring Additional Loan Review LendingThresholdRequiringAdditionalLoanReview	1000000
CY2021Q3	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	484177000
CY2021Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	47122000
CY2021Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	20000
CY2021Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	531279000
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	337012000
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	9448000
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1744000
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	344716000
CY2020Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	476165000
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	45360000
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	248000
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	521277000
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	350060000
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	12430000
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	524000
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	361966000
CY2021Q3	qcrh	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment Net Of Allowance For Credit Losses HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairmentNetOfAllowanceForCreditLosses	484000000.0
CY2021Q3	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	484200000
CY2021Q3	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	174000
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	82955000
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1460000
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	12596000
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	284000
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	95551000
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1744000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	57742000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	485000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	9945000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	39000
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	67687000
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	524000
CY2021Q3	qcrh	Number Of Securities NumberOfSecurities	629
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	91
CY2021Q3	qcrh	Aggregate Depreciation From Amortized Cost Basis Percent AggregateDepreciationFromAmortizedCostBasisPercent	0.0022
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	91
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	9
CY2021Q2	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	174000
	us-gaap	Debt Securities Held To Maturity Credit Loss Expense Reversal DebtSecuritiesHeldToMaturityCreditLossExpenseReversal	9000
CY2021Q3	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	174000
CY2021Q3	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	174000
CY2020Q3	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	22252000
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	23874000
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	28579000
CY2020Q3	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	1802000
	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	1936000
	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	88000
	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	69000
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	3171000
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	3188000
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	26563000
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	27189000
CY2021Q3	qcrh	Held To Maturity Securities Debt Maturities After Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveYearsNetCarryingAmount	454443000
CY2021Q3	qcrh	Held To Maturity Securities Debt Maturities After Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveYearsFairValue	500902000
CY2021Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	484177000
CY2021Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	531279000
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1280000
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	1295000
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	12409000
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	12694000
CY2021Q3	qcrh	Available For Sale Securities Debt Maturities After Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsAmortizedCost	195939000
CY2021Q3	qcrh	Available For Sale Securities Debt Maturities After Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue	199376000
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	209628000
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	213365000
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	337012000
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	344716000
	qcrh	Number Of Charters Owning Municipal Securities NumberOfChartersOwningMunicipalSecurities	4
CY2021Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4599730000
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	80670000
CY2021Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	4519060000
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	4243791000
CY2020Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	7338000
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4251129000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	84376000
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	4166753000
CY2021Q2	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield	2189000
CY2020Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield	3139000
CY2021Q3	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion	505000
	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion	1455000
CY2021Q3	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield	1684000
CY2021Q3	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield	1684000
CY2020Q2	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield	4993000
CY2019Q4	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield	6435000
	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Reclassifications To Nonaccretable Difference CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToNonaccretableDifference	30000
CY2020Q3	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion	942000
	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion	2414000
CY2020Q3	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield	4051000
CY2020Q3	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield	4051000
CY2021Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	4584580000
CY2021Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	14000
CY2021Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	6818000
CY2021Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	4599730000
CY2021Q3	qcrh	Percentage Of Current Loans To Total Loan Lease Portfolio PercentageOfCurrentLoansToTotalLoanLeasePortfolio	0.9967
CY2021Q3	qcrh	Percentage Of Accruing Past Due90 Days Or More To Total Loan Lease Portfolio PercentageOfAccruingPastDue90DaysOrMoreToTotalLoanLeasePortfolio	0.0000
CY2021Q3	qcrh	Percentage Of Nonaccrual Loans To Total Loan Lease Portfolio PercentageOfNonaccrualLoansToTotalLoanLeasePortfolio	0.0015
CY2021Q3	us-gaap	Loans And Leases Receivable Ratio Of Nonperforming Loans To All Loans LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans	1.0000
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	4225516000
CY2020Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	3000
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	13940000
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	4243791000
CY2020Q4	qcrh	Percentage Of Current Loans To Total Loan Lease Portfolio PercentageOfCurrentLoansToTotalLoanLeasePortfolio	0.9957
CY2020Q4	qcrh	Percentage Of Accruing Past Due90 Days Or More To Total Loan Lease Portfolio PercentageOfAccruingPastDue90DaysOrMoreToTotalLoanLeasePortfolio	0.0000
CY2020Q4	qcrh	Percentage Of Nonaccrual Loans To Total Loan Lease Portfolio PercentageOfNonaccrualLoansToTotalLoanLeasePortfolio	0.0033
CY2020Q4	us-gaap	Loans And Leases Receivable Ratio Of Nonperforming Loans To All Loans LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans	1.0000
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	78894000
CY2021Q3	qcrh	Provision For Loan Lease And Other Losses Excluding Off Balance Sheet Exposures And Held To Maturity Securities ProvisionForLoanLeaseAndOtherLossesExcludingOffBalanceSheetExposuresAndHeldToMaturitySecurities	1895000
CY2021Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	287000
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	168000
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	80670000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	84376000
	qcrh	Provision For Loan Lease And Other Losses Excluding Off Balance Sheet Exposures And Held To Maturity Securities ProvisionForLoanLeaseAndOtherLossesExcludingOffBalanceSheetExposuresAndHeldToMaturitySecurities	7747000
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	4674000
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	1323000
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	80670000
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	60827000
CY2020Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	20342000
CY2020Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1819000
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	232000
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	79582000
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	36001000
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	48624000
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	5604000
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	561000
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	79582000
CY2021Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	64101000
CY2021Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	4535629000
CY2021Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4599730000
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	3891000
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	76779000
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	80670000
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	5224000
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	5575000
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	3225000
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	73000
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	73000
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	13380000
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	13380000
CY2020Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	3306000
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	7517000
CY2020Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	18604000
CY2020Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	18955000
CY2020Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	3306000
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	10742000
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	73000
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	73000
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	4396000
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	24000
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	24000
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	10094000
CY2020Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	14490000
CY2020Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	24000
CY2020Q3	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	24000
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	3924000
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	4804000
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	2576000
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	79000
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	79000
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	10704000
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	10704000
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	2680000
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	7578000
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	14628000
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	15508000
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	2680000
CY2020	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	10154000
CY2020	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	79000
CY2020	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	79000
CY2021Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	591000
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	1700000
CY2021Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	3000
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	2599000
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	2599000
	qcrh	Financing Receivable Modifications Specific Allowance Recorded Investment FinancingReceivableModificationsSpecificAllowanceRecordedInvestment	12000
CY2020Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	3000
CY2020Q3	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	197000
CY2020Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	197000
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	8000
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	453000
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	453000
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0
CY2021Q3	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0
CY2020Q3	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1
CY2019Q4	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	32000
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	3
	qcrh	Number Of Troubled Debt Restructurings Restructured And Written Off NumberOfTroubledDebtRestructuringsRestructuredAndWrittenOff	10
	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	482000
CY2021Q3	us-gaap	Derivative Assets DerivativeAssets	198393000
CY2020Q4	us-gaap	Derivative Assets DerivativeAssets	222757000
CY2021Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	201450000
CY2020Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	229270000
	qcrh	Swapped Loan Portfolio Loan To Value Percentage SwappedLoanPortfolioLoanToValuePercentage	0.65
CY2021Q3	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8293000
CY2021Q3	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020Q3	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	4486000
CY2020Q3	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	18512000
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	10712000
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021Q3	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	2032000
CY2021Q3	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	-0.051
CY2020Q3	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	1350000
CY2020Q3	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	-0.063
	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	5553000
	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	-0.063
	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3822000
	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	-0.075
CY2021Q3	qcrh	Income Tax Rate Reconciliation Income Expenses Of Life Insurance Amount IncomeTaxRateReconciliationIncomeExpensesOfLifeInsuranceAmount	93000
CY2021Q3	qcrh	Effective Income Tax Rate Reconciliation Income Expenses Of Life Insurance Percent EffectiveIncomeTaxRateReconciliationIncomeExpensesOfLifeInsurancePercent	-0.002
CY2020Q3	qcrh	Income Tax Rate Reconciliation Income Expenses Of Life Insurance Amount IncomeTaxRateReconciliationIncomeExpensesOfLifeInsuranceAmount	101000
CY2020Q3	qcrh	Effective Income Tax Rate Reconciliation Income Expenses Of Life Insurance Percent EffectiveIncomeTaxRateReconciliationIncomeExpensesOfLifeInsurancePercent	-0.005
	qcrh	Income Tax Rate Reconciliation Income Expenses Of Life Insurance Amount IncomeTaxRateReconciliationIncomeExpensesOfLifeInsuranceAmount	287000
	qcrh	Effective Income Tax Rate Reconciliation Income Expenses Of Life Insurance Percent EffectiveIncomeTaxRateReconciliationIncomeExpensesOfLifeInsurancePercent	-0.003
	qcrh	Income Tax Rate Reconciliation Income Expenses Of Life Insurance Amount IncomeTaxRateReconciliationIncomeExpensesOfLifeInsuranceAmount	271000
	qcrh	Effective Income Tax Rate Reconciliation Income Expenses Of Life Insurance Percent EffectiveIncomeTaxRateReconciliationIncomeExpensesOfLifeInsurancePercent	-0.005
CY2021Q3	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1799000
CY2021Q3	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.046
CY2020Q3	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1003000
CY2020Q3	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.047
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4070000
	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.046
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2456000
	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.048
CY2021Q3	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	57000
CY2021Q3	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.001
CY2020Q3	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	116000
CY2020Q3	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.005
	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	171000
	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.002
	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	348000
	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.007
CY2021Q3	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-107000
CY2021Q3	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.003
CY2020Q3	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	14000
CY2020Q3	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.001
	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-311000
	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.004
	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-248000
	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.005
CY2021Q3	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	126000
CY2021Q3	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.002
CY2020Q3	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	80000
CY2020Q3	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.004
	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-2000
	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	219000
	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.005
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7929000
CY2021Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.201
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4016000
CY2020Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.189
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16258000
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.184
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8698000
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.171
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	31565000
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	17344000
	us-gaap	Net Income Loss NetIncomeLoss	71896000
	us-gaap	Net Income Loss NetIncomeLoss	42311000
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.02
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.10
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.54
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.68
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.99
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.09
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.48
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.65
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15635123
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15767152
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15829124
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15770335
CY2021Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	234675
CY2020Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	156426
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	229296
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	175497
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15869798
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15923578
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	16058420
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15945832
CY2021Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	65027000
CY2020Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	9948000
CY2021Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	86319000
CY2021Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	46229000
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	31565000
CY2021Q3	us-gaap	Goodwill Goodwill	74066000
CY2021Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	9857000
CY2021Q3	us-gaap	Assets Assets	6014508000
CY2020Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	88849000
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	44581000
CY2020Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	20342000
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	17344000
CY2020Q3	us-gaap	Goodwill Goodwill	74066000
CY2020Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	11902000
CY2020Q3	us-gaap	Assets Assets	5864560000
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	225572000
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	131720000
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	6713000
	us-gaap	Net Income Loss NetIncomeLoss	71896000
CY2021Q3	us-gaap	Goodwill Goodwill	74066000
CY2021Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	9857000
CY2021Q3	us-gaap	Assets Assets	6014508000
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	230303000
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	123243000
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	48624000
	us-gaap	Net Income Loss NetIncomeLoss	42311000
CY2020Q3	us-gaap	Goodwill Goodwill	74066000
CY2020Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	11902000
CY2020Q3	us-gaap	Assets Assets	5864560000
CY2021Q3	us-gaap	Capital Capital	785424000
CY2021Q3	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1464
CY2021Q3	qcrh	Capital Required For Capital Adequacy Excluding Capital Conservation Buffer CapitalRequiredForCapitalAdequacyExcludingCapitalConservationBuffer	429282000
CY2021Q3	qcrh	Capital Required For Capital Adequacy To Risk Weighted Assets Without Capital Conservation Buffer CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsWithoutCapitalConservationBuffer	0.0800
CY2021Q3	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	563433000
CY2021Q3	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	10.50
CY2021Q3	us-gaap	Capital Required To Be Well Capitalized CapitalRequiredToBeWellCapitalized	536603000
CY2021Q3	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	10.00
CY2021Q3	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	604268000
CY2021Q3	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1126
CY2021Q3	qcrh	Tier One Risk Based Capital Required For Capital Adequacy Without Capital Conservation Buffer TierOneRiskBasedCapitalRequiredForCapitalAdequacyWithoutCapitalConservationBuffer	321962000
CY2021Q3	qcrh	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Without Capital Conservation Buffer TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsWithoutCapitalConservationBuffer	0.0600
CY2021Q3	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	456113000
CY2021Q3	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	8.50
CY2021Q3	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized TierOneRiskBasedCapitalRequiredToBeWellCapitalized	429282000
CY2021Q3	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	8.00
CY2021Q3	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	604268000
CY2021Q3	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.1028
CY2021Q3	qcrh	Tier One Leverage Capital Required For Capital Adequacy Without Capital Conservation Buffer TierOneLeverageCapitalRequiredForCapitalAdequacyWithoutCapitalConservationBuffer	235118000
CY2021Q3	qcrh	Tier One Leverage Capital Required For Capital Adequacy To Average Assets Without Capital Conservation Buffer TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssetsWithoutCapitalConservationBuffer	0.0400
CY2021Q3	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	235118000
CY2021Q3	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	4.00
CY2021Q3	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized TierOneLeverageCapitalRequiredToBeWellCapitalized	293897000
CY2021Q3	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized To Average Assets TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets	5.00
CY2021Q3	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	566165000
CY2021Q3	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.1055
CY2021Q3	qcrh	Common Equity Tier One Capital Required For Capital Adequacy Without Capital Conservation Buffer CommonEquityTierOneCapitalRequiredForCapitalAdequacyWithoutCapitalConservationBuffer	241471000
CY2021Q3	qcrh	Common Equity Tier1 Capital Adequacy Purposes Ratio Without Capital Conservation Buffer CommonEquityTier1CapitalAdequacyPurposesRatioWithoutCapitalConservationBuffer	0.0450
CY2021Q3	us-gaap	Common Equity Tier One Capital Required For Capital Adequacy CommonEquityTierOneCapitalRequiredForCapitalAdequacy	375622000
CY2021Q3	qcrh	Common Equity Tier1 Capital Adequacy Purposes Ratio CommonEquityTier1CapitalAdequacyPurposesRatio	0.0700
CY2021Q3	us-gaap	Common Equity Tier One Capital Required To Be Well Capitalized CommonEquityTierOneCapitalRequiredToBeWellCapitalized	348792000
CY2021Q3	qcrh	Common Equity Tier1 To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio CommonEquityTier1ToBeWellCapitalizedUnderPromptCorrectiveActionProvisionsRatio	0.0650
CY2020Q4	us-gaap	Capital Capital	721004000
CY2020Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	14.95
CY2020Q4	qcrh	Capital Required For Capital Adequacy Excluding Capital Conservation Buffer CapitalRequiredForCapitalAdequacyExcludingCapitalConservationBuffer	385832000
CY2020Q4	qcrh	Capital Required For Capital Adequacy To Risk Weighted Assets Without Capital Conservation Buffer CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsWithoutCapitalConservationBuffer	0.0800
CY2020Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	506404000
CY2020Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	10.50
CY2020Q4	us-gaap	Capital Required To Be Well Capitalized CapitalRequiredToBeWellCapitalized	482290000
CY2020Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	10.00
CY2020Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	546729000
CY2020Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	11.34
CY2020Q4	qcrh	Tier One Risk Based Capital Required For Capital Adequacy Without Capital Conservation Buffer TierOneRiskBasedCapitalRequiredForCapitalAdequacyWithoutCapitalConservationBuffer	289374000
CY2020Q4	qcrh	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Without Capital Conservation Buffer TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsWithoutCapitalConservationBuffer	0.0600
CY2020Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	409946000
CY2020Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	8.50
CY2020Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized TierOneRiskBasedCapitalRequiredToBeWellCapitalized	385832000
CY2020Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	8.00
CY2020Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	546729000
CY2020Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	9.49
CY2020Q4	qcrh	Tier One Leverage Capital Required For Capital Adequacy Without Capital Conservation Buffer TierOneLeverageCapitalRequiredForCapitalAdequacyWithoutCapitalConservationBuffer	230345000
CY2020Q4	qcrh	Tier One Leverage Capital Required For Capital Adequacy To Average Assets Without Capital Conservation Buffer TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssetsWithoutCapitalConservationBuffer	0.0400
CY2020Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	230345000
CY2020Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	4.00
CY2020Q4	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized TierOneLeverageCapitalRequiredToBeWellCapitalized	287931000
CY2020Q4	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized To Average Assets TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets	5.00
CY2020Q4	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	508736000
CY2020Q4	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	10.55
CY2020Q4	qcrh	Common Equity Tier One Capital Required For Capital Adequacy Without Capital Conservation Buffer CommonEquityTierOneCapitalRequiredForCapitalAdequacyWithoutCapitalConservationBuffer	217030000
CY2020Q4	qcrh	Common Equity Tier1 Capital Adequacy Purposes Ratio Without Capital Conservation Buffer CommonEquityTier1CapitalAdequacyPurposesRatioWithoutCapitalConservationBuffer	0.0450
CY2020Q4	us-gaap	Common Equity Tier One Capital Required For Capital Adequacy CommonEquityTierOneCapitalRequiredForCapitalAdequacy	337603000
CY2020Q4	qcrh	Common Equity Tier1 Capital Adequacy Purposes Ratio CommonEquityTier1CapitalAdequacyPurposesRatio	0.0700
CY2020Q4	us-gaap	Common Equity Tier One Capital Required To Be Well Capitalized CommonEquityTierOneCapitalRequiredToBeWellCapitalized	313488000
CY2020Q4	qcrh	Common Equity Tier1 To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio CommonEquityTier1ToBeWellCapitalizedUnderPromptCorrectiveActionProvisionsRatio	0.0650

Files In Submission

Name	View Source	Status
0001558370-21-014811-index-headers.html	Edgar Link	pending
0001558370-21-014811-index.html	Edgar Link	pending
0001558370-21-014811.txt	Edgar Link	pending
0001558370-21-014811-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
qcrh-20210930.xsd	Edgar Link	pending
qcrh-20210930x10q.htm	Edgar Link	pending
qcrh-20210930x10q_htm.xml	Edgar Link	completed
qcrh-20210930xex31d1.htm	Edgar Link	pending
qcrh-20210930xex31d2.htm	Edgar Link	pending
qcrh-20210930xex32d1.htm	Edgar Link	pending
qcrh-20210930xex32d2.htm	Edgar Link	pending
qcrh-20210930_cal.xml	Edgar Link	unprocessable
qcrh-20210930_def.xml	Edgar Link	unprocessable
qcrh-20210930_lab.xml	Edgar Link	unprocessable
qcrh-20210930_pre.xml	Edgar Link	unprocessable
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$QCRH
QCR HOLDINGS INC Stock $qcrh

2021 Q4 Form 10-Q Financial Statement

#000155837021014811 Filed on November 05, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$QCRH QCR HOLDINGS INC Stock $qcrh

2021 Q4 Form 10-Q Financial Statement

#000155837021014811 Filed on November 05, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$QCRH
QCR HOLDINGS INC Stock $qcrh