Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities - Continuous Unrealized Loss Position (Details)

v3.5.0.2
Marketable Securities - Continuous Unrealized Loss Position (Details)
$ in Thousands
Sep. 30, 2016
USD ($)
Investments in an Unrealized Loss Position  
Fair Value $ 559,207
Gross Unrealized Losses, less than 12 months (842) [1]
Corporate debt securities  
Investments in an Unrealized Loss Position  
Fair Value 372,827
Gross Unrealized Losses, less than 12 months (597) [1]
U.S. Government agency securities  
Investments in an Unrealized Loss Position  
Fair Value 126,547
Gross Unrealized Losses, less than 12 months (149) [1]
U.S. Treasury securities  
Investments in an Unrealized Loss Position  
Fair Value 44,791
Gross Unrealized Losses, less than 12 months (92) [1]
Sovereign securities  
Investments in an Unrealized Loss Position  
Fair Value 13,036
Gross Unrealized Losses, less than 12 months (4) [1]
Municipal securities  
Investments in an Unrealized Loss Position  
Fair Value 2,006
Gross Unrealized Losses, less than 12 months $ 0 [1]
[1] As of September 30, 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.