Note 4 - Goodwill and Acquired Intangible Assets (Detail) - Intangible Assets (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010
Gross Carrying Amount	$ 189,645	[1]	$ 102,084
Accumulated Amortization	(39,990)	[1]	(28,937)
Net Carrying Amount	149,655	[1]	73,147
Licensing Agreements [Member]
Weighted Average Useful Lives (Years)	8	[1]
Gross Carrying Amount	3,922	[1]	3,895
Accumulated Amortization	(2,654)	[1]	(2,465)
Net Carrying Amount	1,268	[1]	1,430
Order or Production Backlog [Member]
Weighted Average Useful Lives (Years)	1	[1]
Gross Carrying Amount	4,651	[1]	3,010
Accumulated Amortization	(3,705)	[1]	(2,999)
Net Carrying Amount	946	[1]	11
Lease Agreements [Member]
Weighted Average Useful Lives (Years)	13	[1]
Gross Carrying Amount	2,067	[1]	1,237
Accumulated Amortization	(183)	[1]	(95)
Net Carrying Amount	1,884	[1]	1,142
Trademarks [Member]
Weighted Average Useful Lives (Years)	13	[1]
Gross Carrying Amount	21,396	[1]	14,948
Accumulated Amortization	(2,141)	[1]	(1,290)
Net Carrying Amount	19,255	[1]	13,658
Noncompete Agreements [Member]
Weighted Average Useful Lives (Years)	3	[1]
Gross Carrying Amount	740	[1]	740
Accumulated Amortization	(729)	[1]	(589)
Net Carrying Amount	11	[1]	151
Customer Relationships [Member]
Weighted Average Useful Lives (Years)	14	[1]
Gross Carrying Amount	102,963	[1]	53,307
Accumulated Amortization	(10,970)	[1]	(6,530)
Net Carrying Amount	91,994	[1]	46,777
Patents and Acquired Technology [Member]
Weighted Average Useful Lives (Years)	15	[1]
Gross Carrying Amount	53,906	[1]	24,947
Accumulated Amortization	(19,608)	[1]	(14,969)
Net Carrying Amount	$ 34,298	[1]	$ 9,978

[1] During 2011, the Company recorded (i) $1.6 million in backlog to be amortized over the weighted average life of one year, (ii) $6.4 million in trademarks and trade names to be amortized over a weighted average life of 20 years, (iii) $0.8 million in leases to be amortized over a weighted average life of ten years, (iv) $49.7 million in customer relationships to be amortized over a weighted average life of 18 years and (v) $23.7 million in patents and acquired technology to be amortized over a weighted average life of 19 years related to the acquisitions discussed in Note 1.