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Related Party Transactions - Narrative (Details) - USD ($)		3 Months Ended		9 Months Ended
	Mar. 15, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Related Party Transaction [Line Items]
Revenue from related parties		$ 73,299,000	$ 103,733,000	$ 218,353,000	$ 302,051,000
Accounts payable		41,610,000		41,610,000		$ 29,329,000
Related Party
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction		0	200,000
NBCUniversal Media, LLC \| Related Party
Related Party Transaction [Line Items]
Revenue from related parties		1,900,000	1,200,000	2,600,000	3,300,000
Related party transaction, amounts of transaction				0	600,000
Outstanding receivable		2,000,000		2,000,000		2,200,000
Accounts payable		200,000		200,000		$ 0
Verizon Ventures LLC \| Verizon Ventures LLC \| Buzzfeed
Related Party Transaction [Line Items]
Percentage of common stock owned by related party	5.00%
Verizon Ventures LLC \| Common Stock
Related Party Transaction [Line Items]
Conversion of stock, shares converted (in shares)	6,478,031
Verizon Ventures LLC \| Related Party
Related Party Transaction [Line Items]
Revenue from related parties		0	0	0	0
Related party transaction, amounts of transaction		$ 1,500,000	$ 1,500,000	$ 4,500,000	$ 4,500,000