Significant Accounting Policies - Translation of Foreign Currency and Foreign Currency Forward Contracts (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Derivative [Line Items]
Realized and unrealized gains (losses) on translation adjustments	$ 1,900	$ (1,500)
Foreign currency forward contracts – Gross notional amount \| Selling, General and Administrative Expenses
Derivative [Line Items]
Foreign currency forward contracts not designated in accounting hedge relationship	$ 5,698	$ (547)

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4CC
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL109998890-113959

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-Section 50
-Paragraph 4C
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Amount of cumulative translation gain (loss), after tax, from translating foreign currency financial statements into the reporting currency.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900

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