Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Jul. 31, 2016
Global Brands Group Asia Limited
Related Party Transaction [Line Items]
Earned fees	$ 0.8	$ 0.7
MHMC \| Maximum
Related Party Transaction [Line Items]
Aggregate percentage of interest in newly registered company in Hong Kong			50.00%