Note 5 - DERIVATIVES AND HEDGING ACTIVITIES - Unhedged Interest Rate Caps and Swaps (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Derivative Asset	$ 261,913	$ 187,341
Derivative Liability	285,769	215,735
Unhedged Derivatives | Interest rate swaps
Derivative Asset, Notional Amount	3,898,579	3,308,024
Derivative Asset	255,740	181,854
Derivative Liability, Notional Amount	3,898,579	3,308,024
Derivative Liability	255,740	181,854
Unhedged Derivatives | Interest rate caps
Derivative Asset, Notional Amount	50,000
Derivative Asset	314	951
Unhedged Derivatives | Derivative Instrument Maturing on 2/1/2024
Derivative Asset, Notional Amount	$ 25,000
Derivative Asset		79
Strike Rate	1.90%
Investment, Variable Interest Rate, Type [Extensible Enumeration]	qcrh:LondonInterbankOfferedRateLiborRateMember
Unhedged Derivatives | Derivative Instrument Maturing on 3/3 2025
Derivative Asset, Notional Amount	$ 25,000
Derivative Asset	$ 314	$ 872
Strike Rate	1.90%
Investment, Variable Interest Rate, Type [Extensible Enumeration]	qcrh:LondonInterbankOfferedRateLiborRateMember