Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities - Amortized Cost and Fair Value (Details)

v3.10.0.1
Marketable Securities - Amortized Cost and Fair Value (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2018
Jun. 30, 2018
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 2,298,255 $ 2,366,008
Gross Unrealized Gains 147 167
Gross Unrealized Losses (11,557) (14,168)
Fair Value 2,286,845 2,352,007
Add: Time deposits [1] 25,842 54,537
Marketable securities, Amortized Cost 1,142,202 1,489,937
Marketable securities, Gross Unrealized Gains 147 167
Marketable securities, Gross Unrealized Losses (11,555) (14,168)
Marketable securities, Fair value 1,130,794 1,475,936
Cash and Cash Equivalents    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 1,181,895 930,608
Gross Unrealized Gains 0 0
Gross Unrealized Losses (2) 0
Fair Value 1,181,893 930,608
Corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 600,825 747,763
Gross Unrealized Gains 137 148
Gross Unrealized Losses (5,866) (7,508)
Fair Value 595,096 740,403
Money market funds and other    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 1,118,051 863,115
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Fair Value 1,118,051 863,115
Sovereign securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 17,352 17,293
Gross Unrealized Gains 0 0
Gross Unrealized Losses (147) (151)
Fair Value 17,205 17,142
U.S. Government agency securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 269,824 326,508
Gross Unrealized Gains 10 16
Gross Unrealized Losses (2,252) (2,827)
Fair Value 267,582 323,697
U.S. Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 292,203 411,329
Gross Unrealized Gains 0 3
Gross Unrealized Losses (3,292) (3,682)
Fair Value $ 288,911 $ 407,650
Corporate and Government securities    
Debt Securities, Available-for-sale [Line Items]    
Investment portfolio, maximum maturity term 3 years  
[1] Time deposits excluded from fair value measurements.