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Note 4 - Loans/Leases Receivable - Remaining Discount on Acquired loans (Details) - Performing Loans - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Balance at the beginning of the period | $ (6,088) | $ (1,533) | $ (3,139)
Discount added at acquisition |  | (13,381) |
Accretion recognized | 2,197 | 8,826 | 1,606
Balance at the end of the period | $ (3,891) | $ (6,088) | $ (1,533)

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- Definition Amount of accretion recognized on acquired loans. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of accrued discount on acquired loans. + References No definition available. + Details
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Namespace Prefix: | qcrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Amount of discount added at acquisition of acquired loans. + References No definition available. + Details
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Namespace Prefix: | qcrh_
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Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC + Details
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- Details
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