XML 155 R139.htm IDEA: XBRL DOCUMENT
v3.19.1

Note 22 - Business Segment Information (Details) | Dec. 31, 2018 subsidiary
--- | ---
Number of subsidiaries commercial banks | 5
Commercial Banking Segment [Member] |
Number of subsidiaries commercial banks | 5
Wealth Management Segment [Member] |
Number of subsidiaries commercial banks | 3

X
- Definition Represents the number of subsidiaries. + References No definition available. + Details
Name: | qcrh_NumberOfSubsidiaries
Namespace Prefix: | qcrh_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=qcrh_CommercialBankingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=qcrh_WealthManagementSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |