Schedule of Gross Carrying Value and Accumulated Amortization for Each Major Class of Intangible Asset (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 437,095	$ 429,063
Intangible assets - Gross Carrying Amount	499,195	491,163
Amortized intangible assets - Accumulated Amortization	(170,165)	(149,791)
Amortized intangible assets - Net	266,930	279,272
Intangible assets - Net	329,030	341,372
Patents
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	10,538	10,650
Amortized intangible assets - Accumulated Amortization	(4,560)	(4,273)
Amortized intangible assets - Net	5,978	6,377
Amortized intangible assets - Weighted Average Life	11 years
Trade Names
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	103,106	103,113
Amortized intangible assets - Accumulated Amortization	(24,675)	(21,603)
Amortized intangible assets - Net	78,431	81,510
Amortized intangible assets - Weighted Average Life	16 years
Customer Relationships
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	238,562	230,196
Amortized intangible assets - Accumulated Amortization	(105,660)	(93,273)
Amortized intangible assets - Net	132,902	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	3,706	3,505
Amortized intangible assets - Accumulated Amortization	(3,114)	(2,827)
Amortized intangible assets - Net	592	678
Amortized intangible assets - Weighted Average Life	3 years
Unpatented technology
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	74,351	74,758
Amortized intangible assets - Accumulated Amortization	(28,208)	(24,211)
Amortized intangible assets - Net	46,143	50,547
Amortized intangible assets - Weighted Average Life	11 years
Other
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	6,832	6,841
Amortized intangible assets - Accumulated Amortization	(3,948)	(3,604)
Amortized intangible assets - Net	2,884	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