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Basis of Presentation (Tables) | 12 Months Ended
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Dec. 31, 2015
Adjustments in Balance Sheet Line Items [Member] |
Summary of Adjustments of Prior Period Financial Statements | The table below reflects the adjustment in the balance sheet line items for the period ended December 31, 2014.
|  | December 31, 2014 |
|  | As previously reported |  |  | Adjustment |  |  | As adjusted |
Short-term investments |  | $ | 129,594 |  |  | $ | 157,201 |  |  | $ | 286,795 |
Long-term investments |  | $ | 157,201 |  |  | $ | (157,201 | ) |  | $ | — |
Adjustments In Fair Value Of Short Term Investments [Member] |
Summary of Adjustments of Prior Period Financial Statements | The fair value of short-term investments consists of the following:
|  | December 31, 2014 |
Available-for-sale investments: |  | As previously reported |  |  | Adjustment |  |  | As adjusted |
Time deposits and certificates of deposit |  | $ | 20,900 |  |  | $ | 48 |  |  | $ | 20,948 |
Bankers acceptance drafts |  |  | 82 |  |  |  | — |  |  |  | 82 |
Asset-backed securities |  |  | — |  |  |  | 75,674 |  |  |  | 75,674 |
Corporate obligations |  |  | 24,020 |  |  |  | 64,669 |  |  |  | 88,689 |
Municipal bonds |  |  | 2,099 |  |  |  | 1,254 |  |  |  | 3,353 |
U.S. agency obligations |  |  | 82,493 |  |  |  | 15,556 |  |  |  | 98,049 |
|  | $ | 129,594 |  |  | $ | 157,201 |  |  | $ | 286,795 |

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- Definition Tabular disclosure of prior period adjustments to previously issued financial statements including (1) the effect of the correction on each financial statement line item and any per-share amounts affected for each prior period presented (2) the cumulative effect of the change on retained earnings or other appropriate components of equity or net assets in the statement of financial position, as of the beginning of the earliest period presented, and (3) the effect of the prior period adjustments (both gross and net of applicable income tax) on the net income of each prior period presented in the entity's annual report for the year in which the adjustments are made. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=56949863&loc=d3e22663-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=56949863&loc=d3e22644-107794 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=56949863&loc=d3e22658-107794 + Details
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