v3.26.1
NOTE 5 - DERIVATIVES AND HEDGING ACTIVITIES - Summary of Hedged Interest Rate Swap and Cap Derivatives (Details) - USD ($)
$ in Thousands
 12 Months Ended 18 Months Ended
Dec. 31, 2025
Jun. 30, 2026
Derivative [Line Items]    
Derivative Asset $ 188,409 $ 211,178
Derivative Liabilities (137,051) (131,921)
Hedged Derivatives    
Derivative [Line Items]    
Derivative, Notional Amount 509,310 439,000
Derivative Asset 576 976
Derivative Liabilities (22,499) (20,365)
Hedged Derivatives | Cash Flow Hedges | Interest rate swaps    
Derivative [Line Items]    
Derivative Liability, Notional Amount   300,000
Derivative, Notional Amount   114,310
Derivative Assets (Liabilities), net (444) 835
Derivative Liabilities (19,149) (19,821)
Hedged Derivatives | Cash Flow Hedges | QCR Holdings Statutory Trust V    
Derivative [Line Items]    
Derivative Asset, Notional Amount   $ 10,000
Receive Rate   5.48%
Pay Rate   4.54%
Derivative Asset 140 $ 236
Hedged Derivatives | Cash Flow Hedges | Community National Statutory Trust III    
Derivative [Line Items]    
Derivative Asset, Notional Amount   $ 3,500
Receive Rate   5.68%
Pay Rate   4.75%
Derivative Asset 64 $ 114
Hedged Derivatives | Cash Flow Hedges | Guaranty Bankshares Statutory Trust I    
Derivative [Line Items]    
Derivative Asset, Notional Amount   $ 4,500
Receive Rate   5.68%
Pay Rate   4.75%
Derivative Asset 50 $ 88
Hedged Derivatives | Cash Flow Hedges | Community National Statutory Trust II    
Derivative [Line Items]    
Derivative Asset, Notional Amount   $ 3,000
Receive Rate   6.13%
Pay Rate   5.17%
Derivative Asset 43 $ 76
Hedged Derivatives | Cash Flow Hedges | QCR Holdings Statutory Trust II    
Derivative [Line Items]    
Derivative Asset, Notional Amount   $ 10,000
Receive Rate   6.84%
Pay Rate   5.85%
Derivative Asset 144 $ 256
Hedged Derivatives | Cash Flow Hedges | QCR Holdings Statutory Trust III    
Derivative [Line Items]    
Derivative Asset, Notional Amount   $ 8,000
Receive Rate   6.84%
Pay Rate   5.85%
Derivative Asset 115 $ 206
Hedged Derivatives | Cash Flow Hedges | Guaranty Statutory Trust II    
Derivative [Line Items]    
Derivative Asset, Notional Amount   10,310
Derivative Asset 20  
Hedged Derivatives | Cash Flow Hedges | QCR Holdings Subordinated Note    
Derivative [Line Items]    
Derivative Liability, Notional Amount   $ 65,000
Receive Rate   4.02%
Pay Rate   4.02%
Derivative Liabilities (1,020) $ (141)
Hedged Derivatives | Cash Flow Hedges | Loans, one    
Derivative [Line Items]    
Derivative Liability, Notional Amount   $ 35,000
Receive Rate   1.40%
Pay Rate   3.75%
Derivative Liabilities (3,798) $ (4,079)
Hedged Derivatives | Cash Flow Hedges | Loans, two    
Derivative [Line Items]    
Derivative Liability, Notional Amount   $ 50,000
Receive Rate   1.40%
Pay Rate   3.75%
Derivative Liabilities (5,425) $ (5,827)
Hedged Derivatives | Cash Flow Hedges | Loans, three    
Derivative [Line Items]    
Derivative Liability, Notional Amount   $ 40,000
Receive Rate   1.40%
Pay Rate   3.75%
Derivative Liabilities (4,348) $ (4,669)
Hedged Derivatives | Cash Flow Hedges | Loans, four    
Derivative [Line Items]    
Derivative Liability, Notional Amount   $ 25,000
Receive Rate   1.30%
Pay Rate   3.62%
Derivative Liabilities (2,734) $ (2,897)
Hedged Derivatives | Cash Flow Hedges | Loan five    
Derivative [Line Items]    
Derivative Liability, Notional Amount   $ 15,000
Receive Rate   1.91%
Pay Rate   3.75%
Derivative Liabilities (285) $ (235)
Hedged Derivatives | Cash Flow Hedges | Loan six    
Derivative [Line Items]    
Derivative Liability, Notional Amount   $ 50,000
Receive Rate   1.91%
Pay Rate   3.75%
Derivative Liabilities (948) $ (783)
Hedged Derivatives | Cash Flow Hedges | Loan seven    
Derivative [Line Items]    
Derivative Liability, Notional Amount   $ 35,000
Receive Rate   1.91%
Pay Rate   3.75%
Derivative Liabilities (664) $ (548)
Hedged Derivatives | Cash Flow Hedges | Loan eight    
Derivative [Line Items]    
Derivative Liability, Notional Amount   $ 50,000
Receive Rate   1.91%
Pay Rate   3.75%
Derivative Liabilities (947) $ (783)
Hedged Derivatives | Cash Flow Hedges | Loan nine    
Derivative [Line Items]    
Derivative Asset, Notional Amount 50,000 50,000
Derivative Liabilities (1)  
Hedged Derivatives | Cash Flow Hedges | Interest rate caps    
Derivative [Line Items]    
Derivative, Notional Amount 49,310 39,000
Derivative Asset 576 976
Derivative Liabilities (20,169) (19,960)
Hedged Derivatives | Fair Value Hedges | Interest rate swaps    
Derivative [Line Items]    
Derivative, Notional Amount 310,000 250,000
Derivative Liabilities (2,186) (112)
Derivative Assets (Liabilities), net (2,186) (111)
Hedged Derivatives | Fair Value Hedges | Loan ten    
Derivative [Line Items]    
Derivative, Notional Amount $ 25,000  
Receive Rate 4.21%  
Pay Rate 4.38%  
Derivative Liabilities $ (15)  
Hedged Derivatives | Fair Value Hedges | Loan Eleven    
Derivative [Line Items]    
Derivative, Notional Amount $ 15,000  
Receive Rate 4.21%  
Pay Rate 4.38%  
Derivative Liabilities $ (9)  
Hedged Derivatives | Fair Value Hedges | Loan Twelve    
Derivative [Line Items]    
Derivative, Notional Amount $ 20,000  
Receive Rate 4.21%  
Pay Rate 4.38%  
Derivative Liabilities $ (12)  
Hedged Derivatives | Fair Value Hedges | Loan Thirteen    
Derivative [Line Items]    
Derivative, Notional Amount   $ 30,000
Receive Rate   3.63%
Pay Rate   4.21%
Derivative Liabilities (119) $ (14)
Hedged Derivatives | Fair Value Hedges | Loan fourteen    
Derivative [Line Items]    
Derivative, Notional Amount   $ 15,000
Receive Rate   3.63%
Pay Rate   4.21%
Derivative Liabilities (59) $ (7)
Hedged Derivatives | Fair Value Hedges | Loan fifteen    
Derivative [Line Items]    
Derivative, Notional Amount   $ 20,000
Receive Rate   3.63%
Pay Rate   4.21%
Derivative Liabilities (79) $ (10)
Hedged Derivatives | Fair Value Hedges | Loan sixteen    
Derivative [Line Items]    
Derivative, Notional Amount   $ 32,500
Receive Rate   3.63%
Pay Rate   4.08%
Derivative Liabilities (251) $ (42)
Hedged Derivatives | Fair Value Hedges | Loan seventeen    
Derivative [Line Items]    
Derivative, Notional Amount   $ 15,000
Receive Rate   3.63%
Pay Rate   4.08%
Derivative Liabilities (116) $ (6)
Hedged Derivatives | Fair Value Hedges | Loan Eighteen    
Derivative [Line Items]    
Derivative, Notional Amount   $ 20,000
Receive Rate   3.63%
Pay Rate   4.08%
Derivative Liabilities (154) $ (26)
Hedged Derivatives | Fair Value Hedges | Loan Nineteen    
Derivative [Line Items]    
Derivative, Notional Amount   $ 32,500
Receive Rate   3.63%
Pay Rate   3.98%
Derivative Asset (352)  
Derivative Liabilities   $ (12)
Hedged Derivatives | Fair Value Hedges | Loan Twenty    
Derivative [Line Items]    
Derivative, Notional Amount   $ 15,000
Receive Rate   3.63%
Pay Rate   3.98%
Derivative Asset (162)  
Derivative Liabilities   $ 11
Hedged Derivatives | Fair Value Hedges | Loan twenty one    
Derivative [Line Items]    
Derivative, Notional Amount   $ 25,000
Receive Rate   3.63%
Pay Rate   3.98%
Derivative Asset (271)  
Derivative Liabilities   $ (9)
Hedged Derivatives | Fair Value Hedges | Loan twenty two    
Derivative [Line Items]    
Derivative, Notional Amount   $ 30,000
Receive Rate   3.63%
Pay Rate   3.90%
Derivative Asset (391)  
Derivative Liabilities   $ 22
Hedged Derivatives | Fair Value Hedges | Loan twenty three    
Derivative [Line Items]    
Derivative, Notional Amount   $ 15,000
Receive Rate   3.63%
Pay Rate   3.90%
Derivative Asset $ (196)  
Derivative Liabilities   $ (18)