Schedule of Amortization of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets		$ 92,672	$ 111,499	$ 187,978	$ 211,307
Cost of sales
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets		711	667	1,422	1,033
Selling, general, and administrative expenses
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets		949	949	1,899	1,899
Amortization of intangible assets
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangible assets	[1]	$ 91,012	$ 109,883	$ 184,657	$ 208,375

[1] Reflects amortization expense for the intangible assets acquired through business combinations.