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Note 9 - Short-term Borrowings - Overnight Repurchase Agreements (Details) - Federal Funds Purchased [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Average daily balance | $ 8,637 | $ 6,280
Average daily interest rate | 1.76% | 0.08%
Maximum month-end balance | $ 129,630 | $ 11,320
Weighted average rate as of December 31 | 4.70% | 0.08%

X
- Definition Represents the average daily balance during the period. + References No definition available. + Details
Name: | qcrh_AverageDailyBalanceDuringThePeriod
Namespace Prefix: | qcrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the average daily interest rate during the period. + References No definition available. + Details
Name: | qcrh_AverageDailyInterestRateDuringThePeriod
Namespace Prefix: | qcrh_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents information about the maximum month end balance during the period. + References No definition available. + Details
Name: | qcrh_MaximumMonthEndBalanceDuringThePeriod
Namespace Prefix: | qcrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
Name: | us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=us-gaap_FederalFundsPurchasedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |