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Note 12 - Preferred Stock (Details) (USD $) | 1 Months Ended | 6 Months Ended | 0 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 23, 2013 | Jun. 30, 2010 | Jun. 30, 2014 | Mar. 31, 2014 | Jun. 29, 2012 | Sep. 15, 2011 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 20, 2013
Note 12 - Preferred Stock (Details) [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock, Shares Outstanding (in Shares) |  |  |  |  |  |  | 0 us-gaap_PreferredStockSharesOutstanding | 0 us-gaap_PreferredStockSharesOutstanding |
Share Price (in Dollars per share) |  |  |  |  |  |  |  |  | $ 17.24 us-gaap_SharePrice
Preferred Stock, Par or Stated Value Per Share (in Dollars per share) |  |  |  |  |  |  | $ 1 us-gaap_PreferredStockParOrStatedValuePerShare | $ 1 us-gaap_PreferredStockParOrStatedValuePerShare |
Share Conversion, Fractional Amount | $ 1,915 qcrh_ShareConversionFractionalAmount |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities (in Shares) | 2,057,502 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities |  |  |  |  |  |  |  |
Preferred Stock, Shares Issued (in Shares) |  |  |  |  |  |  | 0 us-gaap_PreferredStockSharesIssued | 0 us-gaap_PreferredStockSharesIssued |
Series E Non-Cumulative Perpetual Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Note 12 - Preferred Stock (Details) [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  | 7.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = qcrh_SeriesENonCumulativePerpetualPreferredStockMember |  |  |  |  |  |  |
Convertible Preferred Stock, Threshold Trading Days |  | 20 days |  |  |  |  |  |  |
Convertible Preferred Stock, Threshold Consecutive Trading Days |  | 30 days |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share (in Dollars per share) | $ 1,000 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = qcrh_SeriesENonCumulativePerpetualPreferredStockMember |  |  |  |  |  |  |  |
Series F Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Note 12 - Preferred Stock (Details) [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock, Shares Issued (in Shares) |  |  |  |  |  | 40,090 us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember |  |  |
Proceeds from Sale of Treasury Stock |  |  |  |  |  | 40,090,000 us-gaap_ProceedsFromSaleOfTreasuryStock / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember |  |  |
Stock Redeemed or Called During Period, Shares (in Shares) |  |  | 14,867 us-gaap_StockRedeemedOrCalledDuringPeriodShares / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember | 15,000 us-gaap_StockRedeemedOrCalledDuringPeriodShares / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember | 10,223 us-gaap_StockRedeemedOrCalledDuringPeriodShares / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember |  |  |  |
Stock Redeemed or Called During Period, Value |  |  | 14,823,922 us-gaap_StockRedeemedOrCalledDuringPeriodValue / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember | 15,000,000 us-gaap_StockRedeemedOrCalledDuringPeriodValue / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember | 10,223,000 us-gaap_StockRedeemedOrCalledDuringPeriodValue / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember |  |  |  |
Dividends, Preferred Stock |  |  | $ 373,869 us-gaap_DividendsPreferredStock / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember | $ 337,500 us-gaap_DividendsPreferredStock / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember | $ 124,948 us-gaap_DividendsPreferredStock / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesFPreferredStockMember |  |  |  |
Conversion Price for Series E Preferred Stock Into Common Stock [Member] |  |  |  |  |  |  |  |  |
Note 12 - Preferred Stock (Details) [Line Items] |  |  |  |  |  |  |  |  |
Preferred Stock, Redemption Price Per Share (in Dollars per share) |  | 12.15 us-gaap_PreferredStockRedemptionPricePerShare / us-gaap_ConversionOfStockByUniqueDescriptionAxis = qcrh_ConversionPriceForSeriesEPreferredStockIntoCommonStockMember |  |  |  |  |  |  |
Minimum Trading Price to Trigger Stock Conversion [Member] |  |  |  |  |  |  |  |  |
Note 12 - Preferred Stock (Details) [Line Items] |  |  |  |  |  |  |  |  |
Share Price (in Dollars per share) |  | 17.22 us-gaap_SharePrice / us-gaap_ConversionOfStockByUniqueDescriptionAxis = qcrh_MinimumTradingPriceToTriggerStockConversionMember |  |  |  |  |  |  |

X
- Definition Threshold period of specified consecutive trading days within which common stock price must exceed a threshold price for a specified number of trading days to trigger conversion feature, + References No definition available. + Details
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- Definition Threshold number of specified trading days that common stock price must exceed a threshold price within a specified consecutive trading period to trigger conversion feature. + References No definition available. + Details
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- Definition The amount given to shareholders in the conversion of preferred stock in lieu of fractional shares as the amount of fractional shares multiplied by the companies closing share price. + References No definition available. + Details
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- Definition Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 + Details
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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition The cash inflow from the issuance of an equity stock that has been previously reacquired by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition Number of shares issued during the period as a result of the conversion of convertible securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-30) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Number of stock bought back by the entity at the exercise price or redemption price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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