Schedule of Gross Carrying Value and Accumulated Amortization for Each Major Class of Intangible Asset (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 436,190	$ 429,063
Intangible assets - Gross Carrying Amount	498,290	491,163
Amortized intangible assets - Accumulated Amortization	(158,649)	(149,791)
Amortized intangible assets - Net	277,541	279,272
Intangible assets - Net	339,641	341,372
Patents
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	10,526	10,650
Amortized intangible assets - Accumulated Amortization	(4,361)	(4,273)
Amortized intangible assets - Net	6,165	6,377
Amortized intangible assets - Weighted Average Life	11 years
Trade Names
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	102,907	103,113
Amortized intangible assets - Accumulated Amortization	(22,999)	(21,603)
Amortized intangible assets - Net	79,908	81,510
Amortized intangible assets - Weighted Average Life	16 years
Customer Relationships
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	237,937	230,196
Amortized intangible assets - Accumulated Amortization	(98,582)	(93,273)
Amortized intangible assets - Net	139,355	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	3,697	3,505
Amortized intangible assets - Accumulated Amortization	(2,965)	(2,827)
Amortized intangible assets - Net	732	678
Amortized intangible assets - Weighted Average Life	3 years
Unpatented technology
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	74,291	74,758
Amortized intangible assets - Accumulated Amortization	(25,967)	(24,211)
Amortized intangible assets - Net	48,324	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	(3,775)	(3,604)
Amortized intangible assets - Net	3,057	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