Acquisitions - Summary of Changes in Carrying Value of Goodwill (Details) $ in Thousands	9 Months Ended
Sep. 30, 2021 USD ($)
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 58,043
Goodwill, Ending Balance	68,728
Cisneros Interactive
Goodwill [Line Items]
Purchase Price Adjustment	(2,439)
MediaDonuts
Goodwill [Line Items]
Acquisition	13,124
Television
Goodwill [Line Items]
Goodwill, Beginning Balance	40,549
Goodwill, Ending Balance	40,549
Digital
Goodwill [Line Items]
Goodwill, Beginning Balance	17,494
Goodwill, Ending Balance	28,179
Digital \| Cisneros Interactive
Goodwill [Line Items]
Purchase Price Adjustment	(2,439)
Digital \| MediaDonuts
Goodwill [Line Items]
Acquisition	$ 13,124

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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