Foreign Currency Contracts	12 Months Ended
Dec. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Foreign Currency Contracts	9. 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 December 31, 2018, the notional amount and fair value of the Company’s foreign currency forward contracts was $31.2 million and a net loss of $0.2 million, respectively. As of December 31, 2017, the notional amount and fair value of the Company’s foreign currency forward contracts was $17.9 million and a net gain of $0.2 million, respectively. For the years ended December 31, 2018 and 2017, the Company recognized aggregate net gains of $1.5 million and $0.2 million, respectively, which were included in foreign exchange transaction gains (losses) in the consolidated statements of operations.

Foreign Currency Contracts

12 Months Ended

Dec. 31, 2018

Derivative Instruments And Hedging Activities Disclosure [Abstract]

9. 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 December 31, 2018, the notional amount and fair value of the Company’s foreign currency forward contracts was $31.2 million and a net loss of $0.2 million, respectively. As of December 31, 2017, the notional amount and fair value of the Company’s foreign currency forward contracts was $17.9 million and a net gain of $0.2 million, respectively.

For the years ended December 31, 2018 and 2017, the Company recognized aggregate net gains of $1.5 million and $0.2 million, respectively, which were included in foreign exchange transaction gains (losses) in the consolidated statements of operations.