Gains on Sale of Trademarks, Net - Schedule of Gains on Sale of Trademarks, Net (Detail) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Sep. 30, 2020	Sep. 30, 2020
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Net gains on sale of trademarks		$ 74,105	$ 74,105
Umbro Trademark | Iconix China
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Net gains on sale of trademarks	[1]	59,582	59,582
Starter Trademark | Iconix China
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Net gains on sale of trademarks	[2]	$ 14,523	$ 14,523

[1] In July 2020, the Company completed the sale of all of its equity interests of Umbro China, Limited (the “Umbro China Sale”) for gross consideration of $62.5 million. The Umbro China Sale includes the sale of the Umbro sports brand in the People’s Republic of China, Hong Kong, Taiwan and Macau (refer to Note 1 and Note 3).

[2] In September 2020, the Company completed the sale of all of its equity interests of Starter China, Limited (the “Starter China Sale”) for gross consideration of $16.0 million. The Starter China Sale includes the sale of the Starter brand in the mainland of China, Hong Kong, Taiwan and Macau (refer to Note 1 and Note 3).