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Commitments and Contingencies (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Jun. 30, 2018
Other Commitments [Line Items]          
Actual cash expenditures $ 2,011 $ 3,185 $ 5,307 $ 6,445  
Scenario, Forecast [Member] | Minimum [Member]          
Other Commitments [Line Items]          
Actual cash expenditures         $ 6,000
Scenario, Forecast [Member] | Maximum [Member]          
Other Commitments [Line Items]          
Actual cash expenditures         $ 8,000
CDC          
Other Commitments [Line Items]          
Preacquisition contingency, amount of settlement $ 2,300   $ 2,300