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Derivatives and Hedging (Narratives) (Details) $ in Millions | 12 Months Ended
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Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) Contract | Jun. 30, 2018 USD ($)
Interest Rate Swap |  |  |
Derivative [Line Items] |  |  |
Notional principal amount of forward foreign currency contracts | $ 200.0 |  |
Maturity date | Apr. 30, 2023 |  |
Unrealized loss on interest rate cash flow hedges | $ 1.8 |  |
Estimated interest expense over next twelve months | 0.8 |  |
Not Designated as Hedging Instrument | Forward Foreign Currency Contracts |  |  |
Derivative [Line Items] |  |  |
Foreign currency transactions realized gain (loss) | 0.6 | $ 0.1 | $ (1.2)
Number of derivative financial instruments | Contract |  | 0 |
Notional principal amount of forward foreign currency contracts | $ 4.0 |  |
Maximum maturities for contracts | 30 days |  |
Maximum |  |  |
Derivative [Line Items] |  |  |
Foreign currency transactions realized gain (loss) | $ 0.1 | $ 0.1 | $ 0.1

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