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Legal Actions And Contingencies (Narrative) (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Jun. 30, 2018
Apr. 30, 2018
Mar. 31, 2018
Sep. 30, 2020
Sep. 30, 2019
Jun. 30, 2020
Loss Contingencies [Line Items]            
Income taxes payable       $ 68,053   $ 64,755
Contingent Obligations Under Recourse Provisions [Member]            
Loss Contingencies [Line Items]            
Receivables sold with limited recourse       30,600 $ 33,700  
Maximum potential contingent liability       24,500   22,800
Contingent provision       $ 7,300   $ 6,600
Australian Taxation Office [Member]            
Loss Contingencies [Line Items]            
Percentage of penalties on additional income tax 50.00%          
Tax liabilities related to assessments $ 75,900 $ 75,900 $ 151,700      
Interest related to assessments     $ 38,400