Related Party Transactions - Summary of Royalty Revenue Recognized (Parenthetical) (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jul. 31, 2016
Related Party Transaction [Line Items]
Royalty revenue										$ 24,838	$ 24,060	$ 29,290
Licensing revenue		$ 52,299	$ 53,165	$ 61,647	$ 58,722	$ 58,801	$ 60,457	$ 68,209	$ 67,676	225,833	255,143	271,590
Global Brands Group Asia Limited
Related Party Transaction [Line Items]
Royalty revenue	[1],[2]									18,011	3,696	5,672
Earned fees										700	3,300	3,000
Licensing revenue										16,100
Peanuts Holdings, LLC
Related Party Transaction [Line Items]
Royalty revenue										100	500	1,000
MHMC
Related Party Transaction [Line Items]
Royalty revenue	[3]									$ 1,800	$ 1,240	$ 300
MHMC | Maximum
Related Party Transaction [Line Items]
Aggregate percentage of interest in newly registered company in Hong Kong													50.00%

[1] Prior to February 2017, Buffalo International ULC maintained the Buffalo license agreement. However, starting in February 2017, Buffalo International ULC effectively assigned the Buffalo license agreement to GBG. The license revenue from the Buffalo license agreement represents approximately $16.1 million of the total license revenue for GBG shown in the table above for FY 2017.

[2] Royalty revenue of less than $0.1 million, approximately $0.5 million, and approximately $1.0 million for FY 2017, FY 2016 and FY 2015, respectively, which is included in the amounts presented in the table above, relates to royalty revenue associated with Peanuts Worldwide which has been reclassified in to income from discontinued operations on the Company’s consolidated statement of operations for all periods presented. Additionally, GBG also serves as agent to Peanuts Worldwide for the Greater China Territory for Peanuts brands. As of June 30, 2017, due to the completion of the sale of the Entertainment segment, GBG is no longer a related party in its capacity as agent of Peanuts Worldwide. For the years ended FY 2017, FY 2016 and FY 2015, Global Brands Group Asia Limited earned fees of approximately $0.7 million, $3.3 million, and $3.0 million, respectively, in its capacity as agent to Peanuts Worldwide which have been recorded within discontinued operations in the Company’s consolidated statement of operations. Prior to February 2017, Buffalo International ULC maintained the Buffalo license agreement. However, starting in February 2017, Buffalo International ULC effectively assigned the Buffalo license agreement to GBG. The license revenue from the Buffalo license agreement represents approximately $16.1 million of the total license revenue for GBG shown in the table above for FY 2017.

[3] MHMC became a related party to the Company in July 2016 upon consummation of an agreement between a Company subsidiary and MHMC to sell to MHMC up to an aggregate 50% ownership interest in Umbro China. Refer to Note 4 for further details.