XML 107 R92.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 9 - Short-term Borrowings - Overnight Repurchase Agreements (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Repurchase Agreements with Customers [Member] |  |
Average daily balance during the period | $ 7,475,824 | $ 30,082,866
Average daily interest rate during the period | 0.08% | 0.07%
Maximum month-end balance during the period | $ 11,829,201 | $ 59,833,229
Weighted average rate as of end of period | 0.15% | 0.02%
Federal Funds Purchased [Member] |  |
Average daily balance during the period | $ 13,486,239 | $ 19,105,595
Average daily interest rate during the period | 1.31% | 0.56%
Maximum month-end balance during the period | $ 33,650,000 | $ 51,750,000
Weighted average rate as of end of period | 1.24% | 0.70%

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: | num: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: | na
Period Type: | duration

X
- Definition Represents the weighted average rate as of end of the period. + References No definition available. + Details
Name: | qcrh_WeightedAverageRateAsOfEndOfPeriod
Namespace Prefix: | qcrh_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

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