Acquisitions and Disposals - Schedule of Aggregate Consideration Paid and Recognized Identified Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Consideration	$ 23,156	$ 70,572	$ 73,933
Recognized amounts of identifiable assets acquired and liabilities assumed
Goodwill related to noncontrolling interests	1,275	36
2016 Acquisitions [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Consideration	23,082	$ 70,100
Recognized amounts of identifiable assets acquired and liabilities assumed
Other Assets and (Liabilities), Net	(865)
Total Identifiable Assets	7,030
Noncontrolling Interest	1,784
Goodwill Including Noncontrolling Interest of $1,275	17,836
2016 Acquisitions [Member] | Licensing Agreements [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed
Business Combination recognized Identifiable Assets Acquired and Liabilities Assumed Indefinite and Finite Live Intangibles	3,520
2016 Acquisitions [Member] | Trade Names [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed
Business acquisition, purchase price allocation, Intangible Assets	4,113
2016 Acquisitions [Member] | Other Identifiable Intangible Assets [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed
Business acquisition, purchase price allocation, Intangible Assets	$ 262