Note 4 - DERIVATIVES AND HEDGING ACTIVITIES - Summary of Interest Rate Cap Derivatives (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Derivative Assets	$ 170,294	$ 177,631
Interest rate swap
Derivative Assets	159,172	166,614
Interest rate cap
Derivative Assets	1,869	2,213
Cash Flow Hedging | Interest rate swap
Derivative Assets	2,580	477
Cash Flow Hedging | Interest rate cap
Derivative Assets	6,673	8,327
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, one
Notional Amount	$ 25,000
Fair Value - Liability		(50)
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, one | London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.75%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, two
Notional Amount	$ 25,000
Fair Value - Asset	$ 382	714
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, two | London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.75%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, three
Notional Amount	$ 50,000
Fair Value - Asset	$ 929	1,566
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, three | London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.57%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, four
Notional Amount	$ 25,000
Fair Value - Asset	$ 465	783
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, four | London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.80%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, five
Notional Amount	$ 25,000
Fair Value - Asset	$ 1,159	1,264
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, five | London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.75%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, six
Notional Amount	$ 50,000
Fair Value - Asset	$ 2,492	2,700
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, six | London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.57%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, seven
Notional Amount	$ 25,000
Fair Value - Asset	$ 1,246	1,350
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Deposits, seven | London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.80%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Interest rate swap
Notional Amount	$ 49,310
Fair Value - Asset		2,284
Fair value, net	2,580
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | QCR Holdings Statutory Trust II
Notional Amount	10,000
Fair Value - Asset	$ 519	464
Pay Rate	5.85%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | QCR Holdings Statutory Trust III
Notional Amount	$ 8,000
Fair Value - Asset	$ 415	372
Pay Rate	5.85%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | QCR Holdings Statutory Trust V
Notional Amount	$ 10,000
Fair Value - Asset	$ 513	459
Pay Rate	4.54%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Community National Statutory Trust II
Notional Amount	$ 3,000
Fair Value - Asset	$ 156	140
Pay Rate	5.17%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Community National Statutory Trust III
Notional Amount	$ 3,500
Fair Value - Asset	$ 182	163
Pay Rate	4.75%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Guaranty Bankshares Statutory Trust I
Notional Amount	$ 4,500
Fair Value - Asset	$ 234	209
Pay Rate	4.75%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Guaranty Statutory Trust II
Notional Amount	$ 10,310
Fair Value - Asset	$ 561	477
Receive Rate	6.84%
Pay Rate	4.09%
Designated as Hedging Instrument | Derivative Assets. | Cash Flow Hedging | Interest rate cap
Notional Amount	$ 225,000
Fair Value - Asset	6,673	8,327
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging
Notional Amount	300,000
Fair Value - Liability	$ (35,981)	(35,631)
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | QCR Holdings Statutory Trust II
Receive Rate	8.39%
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | QCR Holdings Statutory Trust III
Receive Rate	8.39%
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | QCR Holdings Statutory Trust V
Receive Rate	7.13%
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | Community National Statutory Trust II
Receive Rate	7.68%
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | Community National Statutory Trust III
Receive Rate	7.30%
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | Guaranty Bankshares Statutory Trust I
Receive Rate	7.30%
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | Loans, one
Notional Amount	$ 35,000
Fair Value - Liability	$ (5,585)	(5,646)
Receive Rate	1.40%
Pay Rate	5.22%
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | Loans, two
Notional Amount	$ 50,000
Fair Value - Liability	$ (7,979)	(8,066)
Receive Rate	1.40%
Pay Rate	5.22%
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | Loans, three
Notional Amount	$ 40,000
Fair Value - Liability	$ (6,394)	(6,464)
Receive Rate	1.40%
Pay Rate	5.22%
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | Loans, four
Notional Amount	$ 25,000
Fair Value - Liability	$ (4,039)	(4,018)
Receive Rate	1.30%
Pay Rate	5.09%
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | Loan five
Notional Amount	$ 15,000
Fair Value - Liability	$ (1,198)	(1,144)
Receive Rate	1.91%
Pay Rate	5.22%
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | Loan six
Notional Amount	$ 50,000
Fair Value - Liability	$ (3,995)	(3,812)
Receive Rate	1.91%
Pay Rate	5.22%
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | Loan seven
Notional Amount	$ 35,000
Fair Value - Liability	$ (2,796)	(2,669)
Receive Rate	1.91%
Pay Rate	5.22%
Designated as Hedging Instrument | Derivative Liabilities | Cash Flow Hedging | Loan eight
Notional Amount	$ 50,000
Fair Value - Liability	$ (3,995)	(3,812)
Receive Rate	1.91%
Pay Rate	5.22%
Non Designated
Derivative Assets	$ 1,869	$ 2,213
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Derivative Assets	Derivative Assets
Non Designated | Deposits, one
Derivative Assets		$ 3
Non Designated | Deposits, two
Derivative Assets	$ 534	822
Non Designated | Deposits, five
Derivative Assets	1,335	1,388
Non Designated | Interest rate swap
Derivative Assets	159,172	$ 166,614
Non Designated | Derivative Assets.
Notional Amount	75,000
Non Designated | Derivative Assets. | Deposits, one
Notional Amount	$ 25,000
Non Designated | Derivative Assets. | Deposits, one | London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.90%
Non Designated | Derivative Assets. | Deposits, two
Notional Amount	$ 25,000
Non Designated | Derivative Assets. | Deposits, two | London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.90%
Non Designated | Derivative Assets. | Deposits, five
Notional Amount	$ 25,000
Non Designated | Derivative Assets. | Deposits, five | London Interbank Offered Rate (LIBOR)
Derivative, Basis Spread on Variable Rate	1.90%