Gains on Sale of Trademarks, Net - Schedule of Gains on Sale of Trademarks, Net (Parenthetical) (Detail) - USD ($) $ in Thousands	1 Months Ended		9 Months Ended
	Sep. 30, 2020	Jul. 31, 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]
Proceeds from loan to equity investee			$ 2,750
Umbro China Limited
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Proceeds from loan to equity investee		$ 62,500
Starter China Limited
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]
Proceeds from loan to equity investee	$ 16,000