Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	$ 138,732	$ 100,692
Amortizable intangible assets, accumulated amortization	(86,466)	(73,699)
Amortizable intangible assets, net carrying amount	52,266	26,993
Gross carrying amount	151,759	113,719
Accumulated amortization	(86,466)	(73,699)
Net carrying amount	65,293	40,020
Weighted Average Remaining Life (Years)	12 years 3 months 18 days	5 years 4 months 24 days
Patents and acquired technology
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	68,500	61,667
Amortizable intangible assets, accumulated amortization	(56,327)	(50,904)
Amortizable intangible assets, net carrying amount	12,173	10,763
Weighted Average Remaining Life (Years)	5 years 3 months 18 days	3 years 10 months 24 days
Customer Relationships
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	55,585	33,245
Amortizable intangible assets, accumulated amortization	(24,340)	(18,981)
Amortizable intangible assets, net carrying amount	31,245	14,264
Weighted Average Remaining Life (Years)	13 years 10 months 24 days	6 years 6 months
Trademarks, trade names and other
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	13,378	5,780
Amortizable intangible assets, accumulated amortization	(4,530)	(3,814)
Amortizable intangible assets, net carrying amount	8,848	1,966
Weighted Average Remaining Life (Years)	16 years 4 months 24 days	6 years 2 months 12 days
Customer Backlog
Schedule of Intangible Assets Disclosure [Line Items]
Amortizable intangible assets, gross carrying amount	1,269
Amortizable intangible assets, accumulated amortization	(1,269)
Weighted Average Remaining Life (Years)	0 years
Trade Names
Schedule of Intangible Assets Disclosure [Line Items]
Non-amortizable intangible assets, gross carrying amount	13,027	13,027
Non-amortizable intangible assets, accumulated amortization
Non-amortizable intangible assets, net carrying amount	$ 13,027	$ 13,027