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Fair Value Measurements (Narratives) (Details) - USD ($)
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Assets/Liabilities      
Intangible asset and goodwill impairment   $ 0 $ 0
Level 2      
Assets/Liabilities      
Long-term debt, fair value $ 420,800,000 180,500,000  
Transfers of assets between Level 1 and Level 2 0 0  
Transfers of liabilities between Level 1 and Level 2 0 $ 0  
Level 2 | Interest rate swap contracts      
Assets/Liabilities      
Notional principal amount of forward foreign currency contracts 200,000,000.0    
Level 2 | Other Comprehensive Income (Loss) | Interest rate swap contracts      
Assets/Liabilities      
Unrealized loss on interest rate cash flow hedges (1,800,000)    
Level 2 | Not Designated as Hedging Instrument | Forward Foreign Currency Contracts      
Assets/Liabilities      
Notional principal amount of forward foreign currency contracts $ 4,000,000.0    
Maximum maturities for contracts 30 days 30 days  
Gain (loss) on foreign currency derivative instruments $ 100,000    
Level 3      
Assets/Liabilities      
Acquisition-related contingent consideration obligations 2,200,000 $ 6,300,000  
Transfers of assets between Level 2 and Level 3 0 0  
Transfers of liabilities between Level 2 and Level 3 0 0  
Intangible asset and goodwill impairment $ 0 $ 0