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Basis Of Presentation (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Jul. 01, 2018 | Jun. 30, 2018
--- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Increase (decrease) in retained earnings | $ 840,906 |  | $ 878,516
ASU 2014-09 [Member] |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Increase (decrease) in retained earnings |  | $ 163 |
ASU 2016-01 [Member] |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Increase (decrease) in retained earnings |  | $ (348) |

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