Components of Acquired Intangibles Assets Added During the Period (Detail) - LABite - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	May 05, 2016
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 48,684
Customer and vendor relationships
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 46,513	$ 46,513
Weighted-Average Amortization Period	20 years
Developed technology
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 1,731	1,731
Weighted-Average Amortization Period	1 year
Trademarks
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 440	$ 440
Weighted-Average Amortization Period	2 years