Derivative Instruments and Hedging Activities - Summary of Effect of Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized In OCI on Derivative	$ 41	$ 423	$ (143)	$ 423
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income	59	26	240	26
Designated as Hedging Instrument [Member] \| Cost of Revenues [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income	35	12	139	12
Designated as Hedging Instrument [Member] \| Selling General and Administrative [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income	24	14	101	14
Designated as Hedging Instrument [Member] \| Foreign Exchange Contract [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized In OCI on Derivative	41	423	(143)	423
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized In OCI on Derivative	69	11	319	11
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income	52	177	259	177
Not Designated as Hedging Instrument [Member] \| Cost of Revenues [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income	30	75	120	75
Not Designated as Hedging Instrument [Member] \| Selling General and Administrative [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income	22	102	139	102
Not Designated as Hedging Instrument [Member] \| Foreign Exchange Contract [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized In OCI on Derivative	$ 69	$ 11	$ 319	$ 11

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- Definition

The amount of net gains or losses on foreign currency cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959

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- Definition

Amount of net unrealized gain (loss) related to the change in fair value of foreign currency exchange rate derivatives designated as cash flow hedging instruments. Recorded in accumulated other comprehensive income to the extent that the cash flow hedge is determined to be effective.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959

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