Schedule of Gross Carrying Value and Accumulated Amortization for Each Major Class of Intangible Asset (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 429,063	$ 387,740
Intangible assets - Gross Carrying Amount	491,163	496,848
Amortized intangible assets - Accumulated Amortization	(149,791)	(114,626)
Amortized intangible assets - Net	279,272	273,114
Intangible assets - Net	341,372	382,222
Patents
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	10,650	11,506
Amortized intangible assets - Accumulated Amortization	(4,273)	(4,315)
Amortized intangible assets - Net	6,377	7,191
Amortized intangible assets - Weighted Average Life	11 years
Trade Names
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	103,113	72,823
Amortized intangible assets - Accumulated Amortization	(21,603)	(18,205)
Amortized intangible assets - Net	81,510	54,618
Amortized intangible assets - Weighted Average Life	16 years
Customer Relationships
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	230,196	221,076
Amortized intangible assets - Accumulated Amortization	(93,273)	(69,280)
Amortized intangible assets - Net	136,923	151,796
Amortized intangible assets - Weighted Average Life	10 years
Non-Compete Agreements
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	3,505	4,801
Amortized intangible assets - Accumulated Amortization	(2,827)	(4,053)
Amortized intangible assets - Net	678	748
Amortized intangible assets - Weighted Average Life	3 years
Unpatented technology and other
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	74,758	70,741
Amortized intangible assets - Accumulated Amortization	(24,211)	(15,617)
Amortized intangible assets - Net	50,547	55,124
Amortized intangible assets - Weighted Average Life	11 years
Other Amortizable Intangible Assets
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	6,841	6,793
Amortized intangible assets - Accumulated Amortization	(3,604)	(3,156)
Amortized intangible assets - Net	3,237	3,637
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
CVI and Melles Griot trade names
Goodwill And Intangible Assets [Line Items]
Indefinite lived intangible assets - Gross Carrying Amount		47,008
Indefinite lived intangible assets - Net		$ 47,008