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Note 16 - Employee Benefit Plans (Details Textual) - USD ($)
$ in Millions, shares in Billions
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Defined Benefit Plan, Accumulated Benefit Obligation $ 191.6 $ 199.2  
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year $ 4.7    
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 5.60%    
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 6.35%    
Defined Benefit Plan, Expected Future Benefit Payment, Year One $ 17.5    
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 17.6    
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 17.4    
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 17.0    
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 16.6    
Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years 77.7    
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year $ 6.9    
Retirement Savings Plans [Member]      
Defined Contribution Plans Number of Plans 2    
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 3.1 $ 2.8 $ 3.0
Retirement Savings Plans [Member] | Salaried Employees [Member]      
Defined Contribution Plans Number of Plans 1    
Defined Contribution Plan Company Stock Held in Plan (in shares) 77    
Defined Contribution Plan Company Stock, Percentage of Plan Assets 3.83%    
Retirement Savings Plans [Member] | Hourly Employees [Member]      
Defined Contribution Plans Number of Plans 1