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Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items] |  |
Other borrowings | $ 150,282,492 us-gaap_OtherBorrowings | $ 142,448,362 us-gaap_OtherBorrowings
Wholesale Repurchase Agreements [Member] |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items] |  |
Other borrowings | 130,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsMember | 130,000,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_WholesaleRepurchaseAgreementsMember
Term Note [Member] |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items] |  |
Other borrowings | 17,625,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_TermNoteMember | 9,800,000 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_TermNoteMember
Series A Subordinated Notes [Member] |  |
Note 10 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items] |  |
Other borrowings | $ 2,657,492 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_SeriesASubordinatedNotesMember | $ 2,648,362 us-gaap_OtherBorrowings / us-gaap_DebtInstrumentAxis = qcrh_SeriesASubordinatedNotesMember

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- Definition The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13, 16 -Article 9 + Details
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