Note 4 - DERIVATIVES AND HEDGING ACTIVITIES - Summary of Interest Rate Cap Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Dec. 31, 2022
Derivative Assets	$ 130,350	$ 177,631
Interest rate swap
Derivative Assets	120,366	166,614
Interest rate cap
Derivative Assets	1,786	2,213
Cash Flow Hedging \| Interest rate swap
Derivative Assets	1,484	477
Cash Flow Hedging \| Interest rate cap
Derivative Assets	6,714	8,327
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument One Maturing 2023 [Member]
Notional Amount	$ 25,000
Fair Value - Liability		(50)
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument One Maturing 2023 [Member] \| London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.75%
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument One Maturing 2024 [Member]
Notional Amount	$ 25,000
Fair Value - Asset	$ 515	714
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument One Maturing 2024 [Member] \| London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.75%
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument Two Maturing 2024 [Member]
Notional Amount	$ 50,000
Fair Value - Asset	$ 1,191	1,566
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument Two Maturing 2024 [Member] \| London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.57%
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument Three Maturing 2024 [Member]
Notional Amount	$ 25,000
Fair Value - Asset	$ 596	783
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument Three Maturing 2024 [Member] \| London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.80%
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument One Maturing 2025 [Member]
Notional Amount	$ 25,000
Fair Value - Asset	$ 1,032	1,264
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument One Maturing 2025 [Member] \| London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.75%
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument Two Maturing 2025 [Member]
Notional Amount	$ 50,000
Fair Value - Asset	$ 2,253	2,700
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument Two Maturing 2025 [Member] \| London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.57%
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument Three Maturing 2025 [Member]
Notional Amount	$ 25,000
Fair Value - Asset	$ 1,127	1,350
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Derivative Instrument Three Maturing 2025 [Member] \| London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.80%
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Guaranty Statutory Trust II
Notional Amount	$ 10,310
Fair Value - Asset	$ 400
Fair Value - Liability		(477)
Receive Rate	6.37%
Pay Rate	4.09%
Designated as Hedging Instrument \| Derivative Assets. \| Cash Flow Hedging \| Interest rate cap
Notional Amount	$ 225,000
Fair Value - Asset	6,714	8,327
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging
Notional Amount	300,000
Fair Value - Liability	(29,978)	(35,631)
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| Interest rate swap
Notional Amount	49,310
Fair Value - Liability		(2,284)
Fair value, net	1,484
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| QCR Holdings Statutory Trust II
Notional Amount	10,000
Fair Value - Liability	$ (279)	(464)
Receive Rate	7.60%
Pay Rate	5.85%
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| QCR Holdings Statutory Trust III
Notional Amount	$ 8,000
Fair Value - Liability	$ (223)	(372)
Receive Rate	7.60%
Pay Rate	5.85%
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| QCR Holdings Statutory Trust V
Notional Amount	$ 10,000
Fair Value - Liability	$ (279)	(459)
Receive Rate	6.38%
Pay Rate	4.54%
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| Community National Statutory Trust II
Notional Amount	$ 3,000
Fair Value - Liability	$ (83)	(140)
Receive Rate	7.13%
Pay Rate	5.17%
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| Community National Statutory Trust III
Notional Amount	$ 3,500
Fair Value - Liability	$ (96)	(163)
Receive Rate	6.62%
Pay Rate	4.75%
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| Guaranty Bankshares Statutory Trust I
Notional Amount	$ 4,500
Fair Value - Liability	$ (124)	(209)
Receive Rate	6.62%
Pay Rate	4.75%
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| Loans, one
Notional Amount	$ 35,000
Fair Value - Liability	$ (4,809)	(5,646)
Receive Rate	1.40%
Pay Rate	4.86%
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| Loans, two
Notional Amount	$ 50,000
Fair Value - Liability	$ (6,871)	(8,066)
Receive Rate	1.40%
Pay Rate	4.86%
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| Loans, three
Notional Amount	$ 40,000
Fair Value - Liability	$ (5,508)	(6,464)
Receive Rate	1.40%
Pay Rate	4.86%
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| Loans, four
Notional Amount	$ 25,000
Fair Value - Liability	$ (3,403)	(4,018)
Receive Rate	1.30%
Pay Rate	4.87%
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| Loan five
Notional Amount	$ 15,000
Fair Value - Liability	$ (939)	(1,144)
Receive Rate	1.91%
Pay Rate	4.86%
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| Loan six
Notional Amount	$ 50,000
Fair Value - Liability	$ (3,129)	(3,812)
Receive Rate	1.91%
Pay Rate	4.86%
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| Loan seven
Notional Amount	$ 35,000
Fair Value - Liability	$ (2,190)	(2,669)
Receive Rate	1.91%
Pay Rate	4.86%
Designated as Hedging Instrument \| Derivative Liabilities \| Cash Flow Hedging \| Loan eight
Notional Amount	$ 50,000
Fair Value - Liability	$ (3,129)	(3,812)
Receive Rate	1.91%
Pay Rate	4.86%
Non Designated
Derivative Assets	$ 1,786	$ 2,213
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Derivative Assets	Derivative Assets
Non Designated \| Derivative Instrument One Maturing 2023 [Member]
Derivative Assets		$ 3
Non Designated \| Derivative Instrument One Maturing 2024 [Member]
Derivative Assets	$ 635	822
Non Designated \| Derivative Instrument One Maturing 2025 [Member]
Derivative Assets	1,151	1,388
Non Designated \| Interest rate swap
Derivative Assets	120,366	$ 166,614
Non Designated \| Derivative Assets.
Notional Amount	75,000
Non Designated \| Derivative Assets. \| Derivative Instrument One Maturing 2023 [Member]
Notional Amount	$ 25,000
Non Designated \| Derivative Assets. \| Derivative Instrument One Maturing 2023 [Member] \| London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.90%
Non Designated \| Derivative Assets. \| Derivative Instrument One Maturing 2024 [Member]
Notional Amount	$ 25,000
Non Designated \| Derivative Assets. \| Derivative Instrument One Maturing 2024 [Member] \| London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.90%
Non Designated \| Derivative Assets. \| Derivative Instrument One Maturing 2025 [Member]
Notional Amount	$ 25,000
Non Designated \| Derivative Assets. \| Derivative Instrument One Maturing 2025 [Member] \| London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.90%

Represents the pay rate of the derivative instrument.

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- Definition

Represents the receive rate of the derivative instrument.

+ References

No definition available.

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- Definition

Indicates line item in statement of financial position that includes derivative asset.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

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-Publisher FASB
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- Definition

Fair value as of the balance sheet date of all interest rate derivative assets designated as cash flow hedging instruments.

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Fair value as of the balance sheet date of all interest rate derivatives designated as cash flow hedging instruments.

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Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments.

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