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Note 8 - Deposits (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Aggregate amount of certificates of deposits, $250,000 minimum denomination | $ 169,000,000.0 | $ 175,600,000
Minimum denomination | 250,000 |
Prepaid brokered and public time deposits |  | 29,200,000
Loss on prepayment of brokered and public time deposits |  | 576,000
Prepayment of brokered certificate of deposits | 0 |
Federal Home Loan Bank of Des Moines [Member] |  |
FHLB advance | 129,500,000 | 110,500,000
Amount outstanding | $ 0 | $ 0

X
- Definition The amount of gain or loss on prepayment of brokered and public time deposits. + References No definition available. + Details
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Period Type: | duration

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- Definition The minimum denomination of certificates of deposit. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of brokered and time deposits prepaid during the reporting period. + References No definition available. + Details
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- Definition The amount of prepaid certificate of deposits during the reporting period. + References No definition available. + Details
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Namespace Prefix: | qcrh_
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X
- Definition Amount of the collateral pledged in support of federal home loan bank advances outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations that meet or exceed the Federal Deposit Insurance Corporation (FDIC) insurance limit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=116652737&loc=d3e64164-112818 + Details
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- Details
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