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Investments in Marketable Securities (Tables) | 9 Months Ended
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Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract] |
Schedule of Amortized Cost and Fair Value of Marketable Securities, Available-for-Sale, by Type of Security | Amortized cost and fair value of marketable securities, available-for-sale, by type of security consisted of the following (in thousands):
|  | September 30, 2016 |  |  | December 31, 2015 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 24,864 |  |  | $ | 15 |  |  | $ | (1 | ) |  | $ | 24,878 |  |  | $ | 62,343 |  |  | $ | — |  |  | $ | (71 | ) |  | $ | 62,272 |
U.S. government sponsored entities |  |  | 11,508 |  |  |  | 5 |  |  |  | — |  |  |  | 11,513 |  |  |  | 17,571 |  |  |  | — |  |  |  | (12 | ) |  |  | 17,559 |
Corporate debt securities |  |  | 11,982 |  |  |  | 4 |  |  |  | — |  |  |  | 11,986 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Asset-backed securities and other |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 29 |  |  |  | — |  |  |  | — |  |  |  | 29 |
|  | $ | 48,354 |  |  | $ | 24 |  |  | $ | (1 | ) |  | $ | 48,377 |  |  | $ | 79,943 |  |  | $ | — |  |  | $ | (83 | ) |  | $ | 79,860 |
Long-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasuries |  | $ | 50,535 |  |  | $ | 172 |  |  | $ | (9 | ) |  | $ | 50,698 |  |  | $ | 15,283 |  |  | $ | — |  |  | $ | (112 | ) |  | $ | 15,171 |
U.S. government sponsored entities |  |  | 15,989 |  |  |  | 25 |  |  |  | — |  |  |  | 16,014 |  |  |  | 12,107 |  |  |  | — |  |  |  | (85 | ) |  |  | 12,022 |
Corporate debt securities |  |  | 18,261 |  |  |  | 529 |  |  |  | (21 | ) |  |  | 18,769 |  |  |  | 17,219 |  |  |  | 5 |  |  |  | (519 | ) |  |  | 16,705 |
Asset-backed securities and other |  |  | 8,729 |  |  |  | 118 |  |  |  | (49 | ) |  |  | 8,798 |  |  |  | 10,649 |  |  |  | — |  |  |  | (152 | ) |  |  | 10,497 |
|  | $ | 93,514 |  |  | $ | 844 |  |  | $ | (79 | ) |  | $ | 94,279 |  |  | $ | 55,258 |  |  | $ | 5 |  |  | $ | (868 | ) |  | $ | 54,395 |
Amortized Cost and Fair Value of Investments in Available for Sale Securities | The amortized cost and fair value of the Company’s investments in available-for-sale securities that have been in a continuous unrealized loss position consisted of the following (in thousands):
|  | September 30, 2016 |  |  | December 31, 2015 |
|  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |
Less than 12 months |  | $ | (33 | ) |  | $ | 39,367 |  |  | $ | (951 | ) |  | $ | 129,117 |
12 months or longer |  | $ | (47 | ) |  | $ | 2,747 |  |  | $ | — |  |  | $ | — |
Gross Realized Gains and Losses from Sale of Available for Sale Securities | Gross realized gains and gross realized losses from the sales of the Company’s available-for-sale securities consisted of the following (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Gross realized gain (1) |  | $ | 16 |  |  | $ | — |  |  | $ | 36 |  |  | $ | 133 |
Gross realized loss (1) |  | $ | — |  |  | $ | — |  |  | $ | (155 | ) |  | $ | (3 | )
(1) | Recorded in other income (expense), net in the condensed consolidated statements of net and comprehensive income. The cost basis of securities sold were determined on the specific identification method.
Schedule of Amortized Cost and Fair Value of Marketable Securities, Available-for-Sale, by Contractual Maturity | Amortized cost and fair value of marketable securities, available-for-sale, by contractual maturity consisted of the following (in thousands):
|  | September 30, 2016 |  |  | December 31, 2015 |
|  | Amortized Cost |  |  | Fair Value |  |  | Amortized Cost |  |  | Fair Value |
Due in one year or less |  | $ | 48,354 |  |  | $ | 48,377 |  |  | $ | 79,943 |  |  | $ | 79,860 |
Due after one year through five years |  |  | 70,627 |  |  |  | 70,758 |  |  |  | 28,634 |  |  |  | 28,465 |
Due after five years through ten years |  |  | 14,998 |  |  |  | 15,537 |  |  |  | 18,020 |  |  |  | 17,466 |
Due after ten years |  |  | 7,889 |  |  |  | 7,984 |  |  |  | 8,604 |  |  |  | 8,464 |
|  | $ | 141,868 |  |  | $ | 142,656 |  |  | $ | 135,201 |  |  | $ | 134,255 |
Weighted average contractual maturity |  |  | 3.2 years |  |  |  |  |  |  |  | 3.3 years |  |  |  |  |

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- Definition Tabular disclosure of investments in an unrealized loss position for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), including: (a) the aggregate related fair value of investments with unrealized losses, (b) the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563 + Details
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