Schedule of Gross Carrying Value and Accumulated Amortization for Each Major Class of Intangible Asset (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 442,746	$ 429,063
Intangible assets - Gross Carrying Amount	504,846	491,163
Amortized intangible assets - Accumulated Amortization	(183,446)	(149,791)
Amortized intangible assets - Net	259,300	279,272
Intangible assets - Net	321,400	341,372
Patents
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	10,611	10,650
Amortized intangible assets - Accumulated Amortization	(4,920)	(4,273)
Amortized intangible assets - Net	5,691	6,377
Amortized intangible assets - Weighted Average Life	11 years
Trade names
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	104,248	103,113
Amortized intangible assets - Accumulated Amortization	(26,583)	(21,603)
Amortized intangible assets - Net	77,665	81,510
Amortized intangible assets - Weighted Average Life	16 years
Customer relationships
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	241,836	230,196
Amortized intangible assets - Accumulated Amortization	(113,784)	(93,273)
Amortized intangible assets - Net	128,052	136,923
Amortized intangible assets - Weighted Average Life	10 years
Non-compete agreements
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	3,750	3,505
Amortized intangible assets - Accumulated Amortization	(3,195)	(2,827)
Amortized intangible assets - Net	555	678
Amortized intangible assets - Weighted Average Life	3 years
Unpatented technology
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	75,420	74,758
Amortized intangible assets - Accumulated Amortization	(30,840)	(24,211)
Amortized intangible assets - Net	44,580	50,547
Amortized intangible assets - Weighted Average Life	11 years
Other
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	6,881	6,841
Amortized intangible assets - Accumulated Amortization	(4,124)	(3,604)
Amortized intangible assets - Net	2,757	3,237
Amortized intangible assets - Weighted Average Life	10 years
Banjo trade name
Goodwill And Intangible Assets [Line Items]
Indefinite lived intangible assets - Gross Carrying Amount	62,100	62,100
Indefinite lived intangible assets - Net	$ 62,100	$ 62,100