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Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance of unrecognized tax benefits at beginning of year	$ 74,799	$ 50,953	$ 38,162
Gross amount of increases in unrecognized tax benefits as a result of positions taken during a prior year	10,445	20,361	9,751
Gross amount of decreases in unrecognized tax benefits as a result of positions taken during a prior year	(274)	(2,241)	(5,362)
Gross amount of increases in unrecognized tax benefits as a result of positions taken during the current year	24,400	13,274	14,677
The amounts of decreases in unrecognized benefits relating to settlements with taxing authorities	(1,736)	(3,575)	(4,550)
Reduction in unrecognized tax benefits due to the lapse of applicable statute of limitation	(8,739)	(3,973)	(1,725)
Balance of unrecognized tax benefits at end of year	$ 98,895	$ 74,799	$ 50,953

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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Amount of unrecognized tax benefits.

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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

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