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Investments (Tables) | 9 Months Ended
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Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract] |
Investments Classified as Short-Term and Long-Term Available-for-Sale Investments | Investments classified as short-term consists of the following:
|  | September 30, 2016 |  |  | December 31, 2015 |
Available-for-sale investments: |  |  |  |  |  |  |  |
Time deposits and certificates of deposit |  | $ | 1,395 |  |  | $ | 11,892 |
Bankers’ acceptance drafts |  |  | 2,487 |  |  |  | 728 |
Asset-backed securities |  |  | 18,326 |  |  |  | 124,997 |
Commercial paper |  |  | 2,793 |  |  |  | — |
Corporate obligations |  |  | 16,701 |  |  |  | 165,109 |
Municipal bonds |  |  | 593 |  |  |  | 8,355 |
U.S. treasury obligations |  |  | 1,152 |  |  |  | — |
U.S. agency obligations |  |  | 9,657 |  |  |  | 119,582 |
|  | $ | 53,104 |  |  | $ | 430,663 |
Investments classified as long-term consists of the following:
|  | September 30, 2016 |  |  | December 31, 2015 |
Available-for-sale investments: |  |  |  |  |  |  |  |
Group insurance contracts |  | $ | 5,956 |  |  | $ | — |
Cost method investments: |  |  |  |  |  |  |  |
Minority interest in Reno Sub-Systems, Inc. |  |  | 9,300 |  |  |  | — |
|  | $ | 15,256 |  |  | $ | — |
Gross Unrealized Gains and (Losses) Aggregated by Investment Category Short-Term and Long-Term Securities | The following tables show the gross unrealized gains and (losses) aggregated by investment category for short-term and long-term available-for-sale investments:
As of September 30, 2016: |  | Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized (Losses) |  |  | Estimated Fair Value |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits and certificates of deposit |  | $ | 1,395 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,395 |
Bankers’ acceptance drafts |  |  | 2,487 |  |  |  | — |  |  |  | — |  |  |  | 2,487 |
Asset-backed securities |  |  | 18,317 |  |  |  | 13 |  |  |  | (4 | ) |  |  | 18,326 |
Commercial paper |  |  | 2,794 |  |  |  | — |  |  |  | (1 | ) |  |  | 2,793 |
Corporate obligations |  |  | 16,699 |  |  |  | 15 |  |  |  | (13 | ) |  |  | 16,701 |
Municipal bonds |  |  | 592 |  |  |  | 1 |  |  |  | — |  |  |  | 593 |
U.S. treasury obligations |  |  | 1,151 |  |  |  | 1 |  |  |  | — |  |  |  | 1,152 |
U.S. agency obligations |  |  | 9,653 |  |  |  | 4 |  |  |  | — |  |  |  | 9,657 |
|  | $ | 53,088 |  |  | $ | 34 |  |  | $ | (18 | ) |  | $ | 53,104 |
As of September 30, 2016: |  | Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized (Losses) |  |  | Estimated Fair Value |
Long-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Group insurance contracts |  | $ | 5,988 |  |  | $ | — |  |  | $ | (32 | ) |  | $ | 5,956 |
As of December 31, 2015: |  | Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized (Losses) |  |  | Estimated Fair Value |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits and certificates of deposit |  | $ | 11,893 |  |  | $ | — |  |  | $ | (1 | ) |  | $ | 11,892 |
Bankers’ acceptance drafts |  |  | 728 |  |  |  | — |  |  |  | — |  |  |  | 728 |
Asset-backed securities |  |  | 125,271 |  |  |  | — |  |  |  | (274 | ) |  |  | 124,997 |
Corporate obligations |  |  | 165,445 |  |  |  | 5 |  |  |  | (341 | ) |  |  | 165,109 |
Municipal bonds |  |  | 8,346 |  |  |  | 13 |  |  |  | (4 | ) |  |  | 8,355 |
U.S. agency obligations |  |  | 119,699 |  |  |  | 3 |  |  |  | (120 | ) |  |  | 119,582 |
|  | $ | 431,382 |  |  | $ | 21 |  |  | $ | (740 | ) |  | $ | 430,663 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27198-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 Reference 7: 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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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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