Derivatives - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended
	Sep. 30, 2016	Mar. 31, 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	$ 250.0
Interest rate swap agreement, fair value		$ 0.5	0.8
Interest rate swap agreement, interest rate description		the Company entered into an interest rate swap agreement, which has 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 fixes the interest rate paid on the hedged debt at 1.198% per annum plus the applicable credit spread, which was 1.75% as of March 31, 2020. At March 31, 2020, the notional amount of this transaction was $250.0 and it had a fair value liability of $0.5. 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		15.3	6.5
Forward Exchange Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross notional values of outstanding forward foreign exchange contracts		$ 104.4	$ 154.7