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v3.3.1.900

Cash, Cash Equivalents and Investments - Amortized Cost to Fair Value (Detail) $ in Thousands | Dec. 31, 2015 USD ($)
--- | ---
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | $ 570,273
Gross Unrealized Gains | 159
Gross Unrealized Losses | (1,818)
Fair Value, Total | 568,614
Euro liquidity fund [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value, Total | 47,730
Euro liquidity fund [Member] | Short-term investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 47,667
Gross Unrealized Gains | 63
Gross Unrealized Losses | 0
Fair Value, Total | 47,730
Corporate Bonds [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value, Total | 230,951
Corporate Bonds [Member] | Short-term investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 54,420
Gross Unrealized Gains | 22
Gross Unrealized Losses | (66)
Fair Value, Total | 54,376
Corporate Bonds [Member] | Long-term investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 177,748
Gross Unrealized Gains | 50
Gross Unrealized Losses | (1,223)
Fair Value, Total | 176,575
Agency Bonds [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value, Total | 9,158
Agency Bonds [Member] | Short-term investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 979
Gross Unrealized Gains | 0
Gross Unrealized Losses | (1)
Fair Value, Total | 978
Agency Bonds [Member] | Long-term investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 8,199
Gross Unrealized Gains | 0
Gross Unrealized Losses | (19)
Fair Value, Total | 8,180
Asset-Backed Securities [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value, Total | 86,576
Asset-Backed Securities [Member] | Short-term investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 62,101
Gross Unrealized Gains | 0
Gross Unrealized Losses | (107)
Fair Value, Total | 61,994
Asset-Backed Securities [Member] | Long-term investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 24,633
Gross Unrealized Gains | 2
Gross Unrealized Losses | (53)
Fair Value, Total | 24,582
Municipal Bonds [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value, Total | 5,459
Municipal Bonds [Member] | Short-term investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 590
Gross Unrealized Gains | 0
Gross Unrealized Losses | 0
Fair Value, Total | 590
Municipal Bonds [Member] | Long-term investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 4,849
Gross Unrealized Gains | 20
Gross Unrealized Losses | 0
Fair Value, Total | 4,869
Treasury Bills [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value, Total | 153,797
Treasury Bills [Member] | Short-term investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 109,462
Gross Unrealized Gains | 2
Gross Unrealized Losses | (104)
Fair Value, Total | 109,360
Treasury Bills [Member] | Long-term investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 44,585
Gross Unrealized Gains | 0
Gross Unrealized Losses | (148)
Fair Value, Total | 44,437
Sovereign Bonds [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value, Total | 34,943
Sovereign Bonds [Member] | Short-term investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 21,466
Gross Unrealized Gains | 0
Gross Unrealized Losses | (26)
Fair Value, Total | 21,440
Sovereign Bonds [Member] | Long-term investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 13,574
Gross Unrealized Gains | 0
Gross Unrealized Losses | (71)
Fair Value, Total | $ 13,503

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