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Income Taxes (Schedule of Unrecognized Tax Benefits) (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Unrecognized tax benefits, beginning balance $ 18,913 $ 11,653 $ 11,359
Decrease related to prior year tax positions (1,407)    
Increase related to prior year tax positions   7,180 174
Increase related to current year tax positions   233  
Lapse of statute of limitations   (153) 120
Unrecognized tax benefits, ending balance $ 17,506 $ 18,913 $ 11,653