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Marketable Securities - Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Sep. 30, 2016 | Jun. 30, 2016
Marketable Securities |  |  |
Amortized Cost |  | $ 2,142,364 | $ 2,079,863
Gross Unrealized Gains |  | 2,011 | 4,423
Gross Unrealized Losses |  | (844) | (176)
Fair Value |  | 2,143,531 | 2,084,110
Add: Time deposits | [1] | 30,546 | 77,131
Less: Cash equivalents, Amortized Cost |  | 645,783 | 778,451
Less: Cash equivalents, Gross Unrealized Gains |  | 0 | 1
Less: Cash equivalents, Gross Unrealized Losses |  | (2) | (17)
Less: Cash equivalents, Fair Value |  | 645,781 | 778,435
Marketable securities, Amortized Cost |  | 1,527,127 | 1,378,543
Marketable securities, Gross Unrealized Gains |  | 2,011 | 4,422
Marketable securities, Gross Unrealized Losses |  | (842) | (159)
Marketable securities, Fair Value |  | 1,528,296 | 1,382,806
U.S. Treasury securities |  |  |
Marketable Securities |  |  |
Amortized Cost |  | 271,546 | 326,321
Gross Unrealized Gains |  | 514 | 1,181
Gross Unrealized Losses |  | (92) | 0
Fair Value |  | 271,968 | 327,502
U.S. Government agency securities |  |  |
Marketable Securities |  |  |
Amortized Cost |  | 423,741 | 404,889
Gross Unrealized Gains |  | 426 | 830
Gross Unrealized Losses |  | (149) | (14)
Fair Value |  | 424,018 | 405,705
Municipal securities |  |  |
Marketable Securities |  |  |
Amortized Cost |  | 3,008 | 5,014
Gross Unrealized Gains |  | 1 | 2
Gross Unrealized Losses |  | 0 | 0
Fair Value |  | 3,009 | 5,016
Corporate debt securities |  |  |
Marketable Securities |  |  |
Amortized Cost |  | 840,857 | 676,259
Gross Unrealized Gains |  | 1,067 | 2,372
Gross Unrealized Losses |  | (599) | (157)
Fair Value |  | 841,325 | 678,474
Money market and other |  |  |
Marketable Securities |  |  |
Amortized Cost |  | 581,240 | 626,156
Gross Unrealized Gains |  | 0 | 0
Gross Unrealized Losses |  | 0 | 0
Fair Value |  | 581,240 | 626,156
Sovereign securities |  |  |
Marketable Securities |  |  |
Amortized Cost |  | 21,972 | 41,224
Gross Unrealized Gains |  | 3 | 38
Gross Unrealized Losses |  | (4) | (5)
Fair Value |  | $ 21,971 | $ 41,257
Corporate and Government securities |  |  |
Marketable Securities |  |  |
Maturity term (in years) |  | 3 years |
[1] | Time deposits excluded from fair value measurements.

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