Related Party Transactions - Summary of Royalty Revenue Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Related Party Transaction [Line Items]
Royalty revenue	$ 34,394	$ 50,212	$ 70,336	$ 98,761
Royalty
Related Party Transaction [Line Items]
Royalty revenue	1,198	8,550	2,069	16,008
Royalty | Global Brands Group Asia Limited
Related Party Transaction [Line Items]
Royalty revenue		6,138		11,767
Royalty | Rise Partners, LLC / Top On International Group Limited
Related Party Transaction [Line Items]
Royalty revenue		242		483
Royalty | M.G.S. Sports Trading Limited
Related Party Transaction [Line Items]
Royalty revenue	103	182	218	336
Royalty | Pac Brands USA, Inc.
Related Party Transaction [Line Items]
Royalty revenue	79	23	108	124
Royalty | Albion Equity Partners LLC / GL Damek
Related Party Transaction [Line Items]
Royalty revenue	568	633	1,162	1,218
Royalty | Anthony L&S
Related Party Transaction [Line Items]
Royalty revenue		600		617
Royalty | Sports Direct International plc
Related Party Transaction [Line Items]
Royalty revenue	$ 448		574
Royalty | MHMC
Related Party Transaction [Line Items]
Royalty revenue		$ 732	$ 7	$ 1,463