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Income Taxes - Schedule of Changes in Balance of Gross Unrecognized Tax Benefits (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021		Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Reduction in unrecognized tax benefits	$ 5,171	[1]	$ 5,171	$ 5,981
[1] Recorded as an income tax benefit of $5,171 during the nine months ended September 30, 2021, along with an equal and offsetting amount recorded in other gains and losses, net, to recognize a reduction in the indemnification asset. During the nine months ended September 30, 2020, an income tax benefit of $5,981 was recorded along with an equal and offsetting amount in other gains and losses, net.

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- References

No definition available.

+ Details

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- Definition

Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319

+ Details

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