Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities - Contractual Maturities (Details)

v3.8.0.1
Marketable Securities - Contractual Maturities (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Jun. 30, 2017
Amortized Cost    
Due within one year $ 521,930  
Due after one year through three years 1,172,512  
Marketable securities, Amortized Cost 1,694,442 $ 1,868,187
Fair Value    
Due within one year 520,623  
Due after one year through three years 1,164,173  
Marketable securities, Fair Value $ 1,684,796 $ 1,863,689