Foreign Currency Contracts	9 Months Ended
Sep. 28, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Foreign Currency Contracts	7. Foreign Currency Contracts The Company addresses market risks from changes in foreign currency exchange rates through a risk management program that includes the use of derivative financial instruments to mitigate certain foreign currency transaction exposures from future settlement of non-functional currency monetary assets and liabilities as of the end of a period. The Company does not enter into derivative transactions for speculative purposes. Gains and losses on derivative financial instruments substantially offset losses and gains on the underlying hedged exposures. Furthermore, the Company manages its exposure to counterparty risks on derivative instruments by entering into contracts with a diversified group of major financial institutions and by actively monitoring outstanding positions. Beginning in September 2017, the Company commenced a foreign currency hedging program through the use of forward contracts as a part of its strategy to limit its exposures related to monetary assets and liabilities denominated in currencies other than the functional currency of the Company and its subsidiaries. These forward contracts are not designated as cash flow, fair value or net investment hedges. All changes in the fair value of these forward contracts are recognized in income before income taxes. As of September 28, 2018, the aggregate notional amount of the Company’s foreign currency forward contracts was $30.1 million and the related fair value was a net gain of $0.1 million. As of December 31, 2017, the aggregate notional amount of the Company’s foreign currency forward contracts was $17.9 million and the related fair value was a net gain of $0.2 million. For the three and nine months ended September 28, 2018, the Company recognized an aggregate net loss of $0.2 million and an aggregate net gain of $0.7 million, respectively, which are included in foreign exchange transaction gains (losses) in the consolidated statement of operations. The Company did not have any open foreign currency contracts for the three and nine months ended September 29, 2017.

7. Foreign Currency Contracts

The Company addresses market risks from changes in foreign currency exchange rates through a risk management program that includes the use of derivative financial instruments to mitigate certain foreign currency transaction exposures from future settlement of non-functional currency monetary assets and liabilities as of the end of a period. The Company does not enter into derivative transactions for speculative purposes. Gains and losses on derivative financial instruments substantially offset losses and gains on the underlying hedged exposures. Furthermore, the Company manages its exposure to counterparty risks on derivative instruments by entering into contracts with a diversified group of major financial institutions and by actively monitoring outstanding positions.

Beginning in September 2017, the Company commenced a foreign currency hedging program through the use of forward contracts as a part of its strategy to limit its exposures related to monetary assets and liabilities denominated in currencies other than the functional currency of the Company and its subsidiaries. These forward contracts are not designated as cash flow, fair value or net investment hedges. All changes in the fair value of these forward contracts are recognized in income before income taxes.

As of September 28, 2018, the aggregate notional amount of the Company’s foreign currency forward contracts was $30.1 million and the related fair value was a net gain of $0.1 million. As of December 31, 2017, the aggregate notional amount of the Company’s foreign currency forward contracts was $17.9 million and the related fair value was a net gain of $0.2 million.

For the three and nine months ended September 28, 2018, the Company recognized an aggregate net loss of $0.2 million and an aggregate net gain of $0.7 million, respectively, which are included in foreign exchange transaction gains (losses) in the consolidated statement of operations. The Company did not have any open foreign currency contracts for the three and nine months ended September 29, 2017.