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Derivatives - Additional Information (Detail) - USD ($) $ in Millions |  | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2020 | Dec. 31, 2019 | Apr. 03, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Maximum period for hedging a portion of forecasted foreign currency denominated intercompany sales of inventory |  | 18 months |  |
Accumulated other comprehensive income realization period |  | 12 months |  |
Interest Rate Hedge [Member] | Newport Corporation | Term Loan Credit Agreement [Member] | Secured Debt Repricing Amendment One |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Interest rate swap agreement, maturity date | Sep. 30, 2020 |  |  |
Percentage of debt which is subject to interest rate swap fixed rate | 50.00% |  |  |
Interest rate swap agreement, interest rate | 1.198% |  |  |
Interest rate swap agreement, credit spread rate |  | 1.75% |  |
Interest rate swap agreement, notional amount |  |  | $ 250.0 |
Interest rate swap agreement, fair value |  |  | 0.8 |
Interest rate swap agreement, interest rate description |  | the Company entered into an interest rate swap agreement, which had a maturity date of September 30, 2020, to fix the rate on approximately 50% of its then-outstanding balance under the 2016 Term Loan Facility, as described further in Note 11. This hedge fixed the interest rate paid on the hedged debt at 1.198% per annum plus the applicable credit spread, which was 1.75% as of September 30, 2020. This interest rate swap matured on September 30, 2020. At December 31, 2019, the notional amount of this transaction was $250.0 and it had a fair value asset of $0.8. |  |
Interest Rate Hedge [Member] | Newport Corporation | Incremental Term Loan Facility | Secured Debt Repricing Amendment One |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Interest rate swap agreement, interest rate |  |  |  | 2.309%
Interest rate swap agreement, credit spread rate |  | 1.75% |  |
Interest rate swap agreement, notional amount |  | $ 300.0 | 300.0 | $ 300.0
Interest rate swap agreement, fair value |  | 14.0 | 6.5 |
Forward Exchange Contracts [Member] |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Gross notional values of outstanding forward foreign exchange contracts |  | $ 158.9 | $ 154.7 |

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
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- Definition The percentage points added to the reference rate to compute the variable rate on the interest rate derivative. + References No definition available. + Details
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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + Details
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- Definition Maximum amount of time remaining before foreign currency exchange rate derivatives mature or expire, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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