Related Party Transactions - Summary of Royalty Revenue Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Related Party Transaction [Line Items]
Royalty revenue	$ 35,942	$ 48,548
Royalty
Related Party Transaction [Line Items]
Royalty revenue	7,749	7,458
Royalty | Global Brands Group Asia Limited
Related Party Transaction [Line Items]
Royalty revenue	6,878	5,629
Royalty | Rise Partners, LLC / Top On International Group Limited
Related Party Transaction [Line Items]
Royalty revenue		242
Royalty | M.G.S. Sports Trading Limited
Related Party Transaction [Line Items]
Royalty revenue	116	153
Royalty | Pac Brands USA, Inc.
Related Party Transaction [Line Items]
Royalty revenue	28	100
Royalty | Albion Equity Partners LLC / GL Damek
Related Party Transaction [Line Items]
Royalty revenue	594	585
Royalty | Anthony L&S
Related Party Transaction [Line Items]
Royalty revenue		17
Royalty | Sports Direct International plc
Related Party Transaction [Line Items]
Royalty revenue	126
Royalty | MHMC
Related Party Transaction [Line Items]
Royalty revenue	$ 7	$ 732