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Note 22 - Business Segment Information (Details Textual)	Dec. 31, 2017
Number of Subsidiaries	4

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