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Fair Value Measurements (Narratives) (Details) - USD ($)
12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Interest rate swap contracts      
Assets/Liabilities      
Notional principal amount of forward foreign exchange contracts $ 0 $ 75,000,000.0  
Other Comprehensive Income (Loss) | Interest rate swap contracts      
Assets/Liabilities      
Unrealized gain (loss) on interest rate cash flow hedges   1,300,000  
Not Designated as Hedging Instrument | Forward Foreign Currency Contracts      
Assets/Liabilities      
Notional principal amount of forward foreign exchange contracts $ 3,400,000 $ 9,600,000  
Maximum maturities for contracts 60 days 60 days  
Gain (loss) on foreign currency derivative instruments $ (400,000) $ (1,400,000) $ 500,000
Designated as Hedging Instrument | Forward Foreign Currency Contracts      
Assets/Liabilities      
Unrealized gain (loss) on derivatives 0 0  
Level 2 Assets and Liabilities      
Assets/Liabilities      
Long-term debt, fair value 225,000,000.0 308,600,000  
Transfers of assets between Level 1 and Level 2 0 0  
Transfers of liabilities between Level 1 and Level 2 0 0  
Level 3 Assets and Liabilities      
Assets/Liabilities      
Fair value, measurement level 3 liabilities transfers 0 0  
Transfers of assets between Level 2 and Level 3 0 0  
Transfers of liabilities between Level 2 and Level 3 0 0  
Fair value assets impairment $ 0 $ 0