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Note 20 - Parent Company Only Financial Statements (Details) - Condensed Balance Sheets (USD $) | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
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Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Cash and due from banks | $ 38,235,019 us-gaap_CashAndDueFromBanks | $ 41,950,790 us-gaap_CashAndDueFromBanks |
Interest-bearing deposits at financial institutions | 35,334,682 us-gaap_InterestBearingDepositsInBanks | 33,044,917 us-gaap_InterestBearingDepositsInBanks |
Securities available for sale, at fair value | 451,659,630 us-gaap_AvailableForSaleSecurities | 551,758,458 us-gaap_AvailableForSaleSecurities |
Premises and equipment, net | 36,021,128 us-gaap_PropertyPlantAndEquipmentNet | 36,755,364 us-gaap_PropertyPlantAndEquipmentNet |
Other assets | 23,174,994 us-gaap_OtherAssets | 23,873,150 us-gaap_OtherAssets |
Total assets | 2,524,958,100 us-gaap_Assets | 2,394,952,924 us-gaap_Assets | 2,093,730,492 us-gaap_Assets
Liabilities: |  |  |
Other borrowings | 150,282,492 us-gaap_OtherBorrowings | 142,448,362 us-gaap_OtherBorrowings |
Other liabilities | 38,653,681 us-gaap_OtherLiabilities | 37,003,742 us-gaap_OtherLiabilities |
Total liabilities | 2,380,879,591 us-gaap_Liabilities | 2,247,376,144 us-gaap_Liabilities |
Stockholders' Equity: |  |  |
Preferred stock |  | 29,867 us-gaap_PreferredStockValue |
Common stock | 8,074,443 us-gaap_CommonStockValue | 8,005,708 us-gaap_CommonStockValue |
Additional paid-in capital | 61,668,968 us-gaap_AdditionalPaidInCapital | 90,154,528 us-gaap_AdditionalPaidInCapital |
Retained earnings | 77,876,824 us-gaap_RetainedEarningsAccumulatedDeficit | 64,637,173 us-gaap_RetainedEarningsAccumulatedDeficit |
Treasury stock | (1,606,510)us-gaap_TreasuryStockValue | (1,606,510)us-gaap_TreasuryStockValue |
Total liabilities and stockholders' equity | 2,524,958,100 us-gaap_LiabilitiesAndStockholdersEquity | 2,394,952,924 us-gaap_LiabilitiesAndStockholdersEquity |
Bank Subsidiaries [Member] | Parent Company [Member] |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Investment in subsidiaries | 198,881,739 us-gaap_EquityMethodInvestmentAggregateCost / invest_InvestmentAxis = qcrh_BankSubsidiariesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 187,410,269 us-gaap_EquityMethodInvestmentAggregateCost / invest_InvestmentAxis = qcrh_BankSubsidiariesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Nonbank Subsidiaries [Member] | Parent Company [Member] |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Investment in subsidiaries | 1,388,361 us-gaap_EquityMethodInvestmentAggregateCost / invest_InvestmentAxis = qcrh_NonbankSubsidiariesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,396,632 us-gaap_EquityMethodInvestmentAggregateCost / invest_InvestmentAxis = qcrh_NonbankSubsidiariesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Parent Company [Member] |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |
Cash and due from banks | 4,499,139 us-gaap_CashAndDueFromBanks / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 7,212,584 us-gaap_CashAndDueFromBanks / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Interest-bearing deposits at financial institutions | 190,127 us-gaap_InterestBearingDepositsInBanks / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 187,401 us-gaap_InterestBearingDepositsInBanks / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Securities available for sale, at fair value | 1,724,353 us-gaap_AvailableForSaleSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 1,644,663 us-gaap_AvailableForSaleSecurities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Premises and equipment, net | 3,160,035 us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 3,243,575 us-gaap_PropertyPlantAndEquipmentNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Other assets | 6,765,109 us-gaap_OtherAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 8,709,546 us-gaap_OtherAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Total assets | 216,608,863 us-gaap_Assets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 209,804,670 us-gaap_Assets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Liabilities: |  |  |
Other borrowings | 21,745,116 us-gaap_OtherBorrowings / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 14,104,323 us-gaap_OtherBorrowings / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Junior subordinated debentures | 40,423,735 us-gaap_JuniorSubordinatedNotes / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 40,289,830 us-gaap_JuniorSubordinatedNotes / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Other liabilities | 10,361,503 us-gaap_OtherLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 7,833,737 us-gaap_OtherLiabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Total liabilities | 72,530,354 us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 62,227,890 us-gaap_Liabilities / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Stockholders' Equity: |  |  |
Preferred stock |  | 29,867 us-gaap_PreferredStockValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Common stock | 8,074,443 us-gaap_CommonStockValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 8,005,708 us-gaap_CommonStockValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Additional paid-in capital | 61,668,968 us-gaap_AdditionalPaidInCapital / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 90,154,528 us-gaap_AdditionalPaidInCapital / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Retained earnings | 77,876,824 us-gaap_RetainedEarningsAccumulatedDeficit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 64,637,173 us-gaap_RetainedEarningsAccumulatedDeficit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Accumulated other comprehensive loss | (1,935,216)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (13,643,986)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Treasury stock | (1,606,510)us-gaap_TreasuryStockValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (1,606,510)us-gaap_TreasuryStockValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Total stockholders' equity | 144,078,509 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 147,576,780 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Total liabilities and stockholders' equity | $ 216,608,863 us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 209,804,670 us-gaap_LiabilitiesAndStockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.30(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + 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 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.1) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1, 2, 3 -Article 9 + Details
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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + 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 210.5-02.29) -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 30 -Article 5 + Details
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- Definition For banks and other depository institutions (including Federal Reserve Banks, if applicable): Interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6476743&loc=d3e59706-112781 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 2 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.2) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. + 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 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 4: 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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