Intangible Assets, Net - Schedule of Intangible Assets by Major Class (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 390,774	$ 372,422
Impairment Loss	20,800
Accumulated Amortization	90,367	62,730
Net Carrying Amount	279,607	309,692
Weighted-Average Amortization Period (in years)	11 years 6 months	12 years 6 months
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	208,766	196,296
Impairment Loss	20,800
Accumulated Amortization	41,968	29,219
Net Carrying Amount	145,998	167,077
Weighted-Average Amortization Period (in years)	11 years 2 months 12 days	12 years
Acquired Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	101,500	98,855
Accumulated Amortization	27,325	19,176
Net Carrying Amount	74,175	79,679
Weighted-Average Amortization Period (in years)	12 years 2 months 12 days	13 years 6 months
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	65,024	66,048
Accumulated Amortization	11,663	7,954
Net Carrying Amount	53,361	58,094
Weighted-Average Amortization Period (in years)	12 years 6 months	13 years 2 months 12 days
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,484	11,223
Accumulated Amortization	9,411	6,381
Net Carrying Amount	$ 6,073	$ 4,842
Weighted-Average Amortization Period (in years)	1 year 8 months 12 days	1 year 6 months