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
Sep. 30, 2017
Jun. 30, 2017
Amortized Cost    
Due within one year $ 497,313  
Due after one year through three years 1,242,326  
Marketable securities, Amortized Cost 1,739,639 $ 1,868,187
Fair Value    
Due within one year 496,788  
Due after one year through three years 1,238,999  
Marketable securities, Fair Value $ 1,735,787 $ 1,863,689