Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities - Continuous Unrealized Loss Position (Details)

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Marketable Securities - Continuous Unrealized Loss Position (Details)
$ in Thousands
 9 Months Ended
Mar. 31, 2016
USD ($)
Investments in an Unrealized Loss Position  
Fair Value $ 308,978
Gross Unrealized Losses, less than 12 months $ (443)
Continuous loss position not exceeding this period (in months) 12 months
U.S. Treasury securities  
Investments in an Unrealized Loss Position  
Fair Value $ 15,026
Gross Unrealized Losses, less than 12 months (6) [1]
U.S. Government agency securities  
Investments in an Unrealized Loss Position  
Fair Value 78,609
Gross Unrealized Losses, less than 12 months (42) [1]
Corporate debt securities  
Investments in an Unrealized Loss Position  
Fair Value 195,167
Gross Unrealized Losses, less than 12 months (386) [1]
Sovereign securities  
Investments in an Unrealized Loss Position  
Fair Value 20,176
Gross Unrealized Losses, less than 12 months $ (9) [1]
[1] As of March 31, 2016, the amount of total gross unrealized losses related to investments that had been in a continuous loss position for 12 months or more was immaterial.