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Foreign Exchange Forward Contracts (Narratives) (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($) | Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2018 Contract
Derivative [Line Items] |  |  |  |  |
Foreign currency transactions realized gain (loss) |  | $ (300,000) | $ 100,000 | $ (1,500,000) |
Maximum |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Foreign currency transactions realized gain (loss) | $ (100,000) |  |  |  |
Not Designated as Hedging Instrument | Forward Foreign Currency Contracts |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Number of derivative financial instruments | Contract |  |  |  |  | 0
Notional principal amount of forward foreign currency contracts | $ 6,700,000 |  | $ 6,700,000 |  |
Maximum maturities for contracts |  |  | 90 days |  |

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