Related Party Transactions - Summary of Royalty Revenue Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Related Party Transaction [Line Items]
Royalty revenue	$ 35,471	$ 46,224	$ 105,806	$ 144,984
Royalty
Related Party Transaction [Line Items]
Royalty revenue	1,164	4,798	3,233	20,804
Royalty | Global Brands Group Asia Limited
Related Party Transaction [Line Items]
Royalty revenue		2,587		14,353
Royalty | Rise Partners, LLC / Top On International Group Limited
Related Party Transaction [Line Items]
Royalty revenue		242		725
Royalty | M.G.S. Sports Trading Limited
Related Party Transaction [Line Items]
Royalty revenue	111	139	329	475
Royalty | Pac Brands USA, Inc.
Related Party Transaction [Line Items]
Royalty revenue	131	47	239	171
Royalty | Albion Equity Partners LLC / GL Damek
Related Party Transaction [Line Items]
Royalty revenue	615	776	1,777	1,993
Royalty | Anthony L&S
Related Party Transaction [Line Items]
Royalty revenue				617
Royalty | Sports Direct International plc
Related Party Transaction [Line Items]
Royalty revenue	$ 307	275	881	275
Royalty | MHMC
Related Party Transaction [Line Items]
Royalty revenue		$ 732	$ 7	$ 2,195