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Document and Entity Information
Oct. 20, 2025
Document and Entity Information [Abstract]  
Document Type 8-K
Document Period End Date Oct. 20, 2025
Entity Registrant Name QCR Holdings, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 0-22208
Entity Tax Identification Number 42-1397595
Entity Address, Address Line One 3551 Seventh Street
Entity Address, City or Town Moline
Entity Address State Or Province IL
Entity Address, Postal Zip Code 61265
City Area Code 309
Local Phone Number 736-3584
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $1.00 Par Value
Trading Symbol QCRH
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Entity Central Index Key 0000906465
Amendment Flag false