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Legal Actions And Contingencies (Narrative) (Details) - USD ($)
$ in Thousands
1 Months Ended 9 Months Ended
Jun. 30, 2018
Mar. 31, 2018
Mar. 31, 2019
Loss Contingencies [Line Items]      
Income taxes payable $ 160,427   $ 52,739
Australian Taxation Office [Member]      
Loss Contingencies [Line Items]      
Percentage of penalties on additional income tax 50.00%    
Tax liabilities related to assessments   $ 151,700  
Interest related to assessments   $ 38,400  
Penalties related to assessments $ 75,900    
Minimum [Member] | Australian Taxation Office [Member]      
Loss Contingencies [Line Items]      
Tax year under audit   2009 2014
Maximum [Member] | Australian Taxation Office [Member]      
Loss Contingencies [Line Items]      
Tax year under audit   2013 2017