Acquisitions - Reconciliation of Changes in Redeemable Noncontrolling Interests (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2021
Business Acquisition [Line Items]
Beginning balance		$ 33,285
Net income attributable to redeemable noncontrolling interest	$ 1,753	5,938
Acquisition of redeemable noncontrolling interest	(45,177)
Cisneros Interactive
Business Acquisition [Line Items]
Beginning balance	37,470	33,285
Net income attributable to redeemable noncontrolling interest	1,753	5,938
Acquisition of redeemable noncontrolling interest	$ (39,223)	$ (39,223)

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

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Amount of Net Income (Loss) attributable to redeemable noncontrolling interest.

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As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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