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Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $) | Series F Noncumulative Perpetual Preferred Stock [Member] Preferred Stock [Member] | Series F Noncumulative Perpetual Preferred Stock [Member] Additional Paid-in Capital [Member] | Series F Noncumulative Perpetual Preferred Stock [Member] | Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Treasury Stock [Member] | Total
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Balance at Dec. 31, 2013 |  |  |  | $ 29,867 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | $ 8,005,708 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 90,154,528 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 64,637,173 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (13,643,986)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ (1,606,510)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ 147,576,780 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Net income |  |  |  |  |  |  | 3,889,215 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  | 3,889,215 us-gaap_ProfitLoss
Other comprehensive income, net of tax |  |  |  |  |  |  |  | 5,230,784 us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  | 5,230,784 us-gaap_OtherComprehensiveIncomeLossNetOfTax
Preferred cash dividends declared |  |  |  |  |  |  | (708,008)us-gaap_DividendsPreferredStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  | (708,008)us-gaap_DividendsPreferredStockCash
Redemption of 15,000 shares of Series F Noncumulative Perpetual Preferred Stock | (15,000)us-gaap_StockRedeemedOrCalledDuringPeriodValue / us-gaap_StatementClassOfStockAxis = qcrh_SeriesFNoncumulativePerpetualPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | (14,985,000)us-gaap_StockRedeemedOrCalledDuringPeriodValue / us-gaap_StatementClassOfStockAxis = qcrh_SeriesFNoncumulativePerpetualPreferredStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (15,000,000)us-gaap_StockRedeemedOrCalledDuringPeriodValue / us-gaap_StatementClassOfStockAxis = qcrh_SeriesFNoncumulativePerpetualPreferredStockMember |  |  |  |  |  |  |
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan |  |  |  |  | 6,189 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 78,256 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 84,445 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
Proceeds from issuance of common stock as a result of stock options exercised |  |  |  |  | 9,814 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 85,582 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 95,396 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Stock compensation expense |  |  |  |  |  | 347,752 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 347,752 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Tax benefit of nonqualified stock options exercised |  |  |  |  |  | 18,647 us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 18,647 us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet
Restricted stock awards |  |  |  |  | 27,197 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (27,197)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |
Exchange of shares of common stock in connection with restricted stock vested |  |  |  |  | (10,300)qcrh_ExchangeOfSharesOfCommonStockInConnectionWithRestrictedStockVested / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (167,684)qcrh_ExchangeOfSharesOfCommonStockInConnectionWithRestrictedStockVested / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | (177,984)qcrh_ExchangeOfSharesOfCommonStockInConnectionWithRestrictedStockVested
Balance at Mar. 31, 2014 |  |  |  | 14,867 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 8,038,608 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 75,504,884 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 67,818,380 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (8,413,202)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (1,606,510)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 141,357,027 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Balance at Dec. 31, 2014 |  |  |  |  | 8,074,443 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 61,668,968 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 77,876,824 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (1,935,216)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (1,606,510)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 144,078,509 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Net income |  |  |  |  |  |  | 4,177,889 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  | 4,177,889 us-gaap_ProfitLoss
Other comprehensive income, net of tax |  |  |  |  |  |  |  | 2,220,865 us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  | 2,220,865 us-gaap_OtherComprehensiveIncomeLossNetOfTax
Proceeds from issuance of common stock as a result of stock purchased under the Employee Stock Purchase Plan |  |  |  |  | 5,679 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 82,641 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 88,320 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
Proceeds from issuance of common stock as a result of stock options exercised |  |  |  |  | 9,688 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 94,728 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 104,416 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Stock compensation expense |  |  |  |  |  | 367,775 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 367,775 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Tax benefit of nonqualified stock options exercised |  |  |  |  |  | 15,651 us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 15,651 us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet
Restricted stock awards |  |  |  |  | 26,502 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (26,502)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |
Exchange of shares of common stock in connection with restricted stock vested |  |  |  |  | (3,272)qcrh_ExchangeOfSharesOfCommonStockInConnectionWithRestrictedStockVested / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (54,188)qcrh_ExchangeOfSharesOfCommonStockInConnectionWithRestrictedStockVested / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | (57,460)qcrh_ExchangeOfSharesOfCommonStockInConnectionWithRestrictedStockVested
Balance at Mar. 31, 2015 |  |  |  |  | $ 8,113,040 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 62,149,073 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 82,054,713 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 285,649 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ (1,606,510)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ 150,995,965 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

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- Definition This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation". + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415241&loc=d3e4534-113899 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11149-113907 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11178-113907 + Details
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