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Fair Value Measurements (Schedule of Change in Acquisition-related Contingent Consideration Obligations) (Details) - Level 3 Investments
$ in Thousands
12 Months Ended
Jun. 30, 2018
USD ($)
Business Acquisition Contingent Consideration [Line Items]  
Initial fair value measurements $ 47,030
Payments (671)
Resolution of contingency (36,980)
Accretion on discount 3,134
Change in fair value 236
Ending balance $ 12,749