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Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Related Party Transactions - Summary of Royalty Revenue Recognized (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jul. 31, 2016
Global Brands Group Asia Limited
Related Party Transaction [Line Items]
Earned fees	$ 3.3	$ 3.0	$ 3.0
MHMC \| Maximum
Related Party Transaction [Line Items]
Aggregate percentage of interest in newly registered company in Hong Kong				50.00%