Annual report pursuant to Section 13 and 15(d)

Marketable Securities - Continuous Unrealized Loss Position (Details)

v3.7.0.1
Marketable Securities - Continuous Unrealized Loss Position (Details)
$ in Thousands
Jun. 30, 2017
USD ($)
Investments in an Unrealized Loss Position  
Fair Value $ 1,412,872
Gross Unrealized Losses, less than 12 months (5,210) [1]
Corporate debt securities  
Investments in an Unrealized Loss Position  
Fair Value 716,934
Gross Unrealized Losses, less than 12 months (1,940) [1]
U.S. Government agency securities  
Investments in an Unrealized Loss Position  
Fair Value 328,868
Gross Unrealized Losses, less than 12 months (1,786) [1]
U.S. Treasury securities  
Investments in an Unrealized Loss Position  
Fair Value 324,555
Gross Unrealized Losses, less than 12 months (1,429) [1]
Sovereign securities  
Investments in an Unrealized Loss Position  
Fair Value 42,515
Gross Unrealized Losses, less than 12 months $ (55) [1]
[1] As of June 30, 2017, 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.