Related Party Transactions - Summary of Royalty Revenue Recognized (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jul. 31, 2016
Global Brands Group Asia Limited
Related Party Transaction [Line Items]
Earned fees	$ 0.7	$ 0.7	$ 1.6	$ 1.5
MHMC | Maximum
Related Party Transaction [Line Items]
Aggregate percentage of interest in newly registered company in Hong Kong					50.00%