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Derivative Financial Instruments - Summary of Forward Foreign Currency Exchange Contracts Outstanding (Details) - Designated as Hedging Instrument € in Thousands, £ in Thousands	Sep. 30, 2021 EUR (€) derivative_instrument	Sep. 30, 2021 GBP (£) derivative_instrument	Dec. 31, 2020 EUR (€) derivative_instrument	Dec. 31, 2020 GBP (£) derivative_instrument
Euros
Derivative [Line Items]
Number of Contracts	12	12	26	26
Aggregate Notional Amount in Foreign Currency | €	€ 1,700		€ 3,855
British Pounds
Derivative [Line Items]
Number of Contracts	11	11	21	21
Aggregate Notional Amount in Foreign Currency | £		£ 1,725		£ 2,658
Foreign Exchange Contracts
Derivative [Line Items]
Number of Contracts	23	23	47	47

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+ References

No definition available.

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: 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=125515794&loc=SL5580258-113959

Reference 2: 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=125515794&loc=SL5579245-113959

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- Definition

The number of derivative instruments of a particular group held by the entity.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 815
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-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

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