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Financial Instruments - Additional Information (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2013 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Financial Instruments and Fair Value [Line Items] |  |  |  |  |
Available-for-sale securities, realized loss |  |  | $ 500,000 | $ 400,000 | $ 0
Available-for-sale securities, realized gain |  |  | 1,600,000 | 1,700,000 | 2,400,000
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses |  |  | 732,979,000 | 601,660,000 |
Fair market value of investments with unrealized losses greater than one year |  |  | 2,900,000 | 900,000 |
Aggregate loss of investments with unrealized losses greater than one year |  |  | 300,000 | 500,000 |
Fair market value of investments with unrealized losses less than one year |  |  | 730,100,000 | 600,800,000 |
Aggregate loss of investments with unrealized losses less than one year |  |  | 2,500,000 | 3,600,000 |
Gains (losses) on foreign currency transactions |  |  | 8,000,000 | 2,500,000 | 900,000
Realized (losses) gains on foreign currency contracts |  |  | $ (8,700,000) | (3,000,000) | $ (200,000)
Proceeds from sale of equity interest | $ 5,400,000 | $ 34,200,000 |  | $ 5,406,000 |
Accounts Receivable | Customer 1 | Minimum |  |  |  |  |
Financial Instruments and Fair Value [Line Items] |  |  |  |  |
Concentration risk, percentage |  |  | 10.00% |  |
Accounts Receivable | Customer 2 | Minimum |  |  |  |  |
Financial Instruments and Fair Value [Line Items] |  |  |  |  |
Concentration risk, percentage |  |  |  | 10.00% |
Foreign Currency Forward Contracts |  |  |  |  |
Financial Instruments and Fair Value [Line Items] |  |  |  |  |
Gains (losses) on foreign currency transactions |  |  | $ (100,000) | $ 0 |
Equity And Debt Mutual Funds |  |  |  |  |
Financial Instruments and Fair Value [Line Items] |  |  |  |  |
Available for sale securities with out contractual maturity date |  |  | 18,000,000 |  |
Universal Robots |  |  |  |  |
Financial Instruments and Fair Value [Line Items] |  |  |  |  |
Maximum payment per earn-out |  |  | $ 25,000,000 |  |

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- Definition Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563 + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563 + Details
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- Definition Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563 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 + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563 + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563 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 + Details
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- Definition Amount of available-for-sale debt securities at fair value that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the fair value over several maturity groupings. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 + Details
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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 + Details
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