Note 4 - Goodwill and Acquired Intangible Assets (Detail) - Intangible Assets (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Gross Carrying Amount	$ 215,711	[1]	$ 199,265	[2]
Accumulated Amortization	(53,433)	[1]	(42,244)	[2]
Net Carrying Amount	162,278	[1]	157,021	[2]
Licensing Agreements [Member]
Weighted Average Useful Lives (Years)	7 years 109 days	[1]
Gross Carrying Amount	3,925	[1]	3,922	[2]
Accumulated Amortization	(2,821)	[1]	(2,654)	[2]
Net Carrying Amount	1,104	[1]	1,268	[2]
Order or Production Backlog [Member]
Gross Carrying Amount	5,196	[1]	5,191	[2]
Accumulated Amortization	(5,196)	[1]	(4,245)	[2]
Net Carrying Amount		[1]	946	[2]
Lease Agreements [Member]
Weighted Average Useful Lives (Years)	13 years 255 days	[1]	10 years
Gross Carrying Amount	2,067	[1]	2,067	[2]
Accumulated Amortization	(331)	[1]	(183)	[2]
Net Carrying Amount	1,736	[1]	1,884	[2]
Trademarks [Member]
Weighted Average Useful Lives (Years)	17 years 73 days	[1]
Gross Carrying Amount	21,810	[1]	21,716	[2]
Accumulated Amortization	(3,417)	[1]	(2,187)	[2]
Net Carrying Amount	18,393	[1]	19,529	[2]
Noncompete Agreements [Member]
Gross Carrying Amount	740	[1]	740	[2]
Accumulated Amortization	(740)	[1]	(729)	[2]
Net Carrying Amount		[1]	11	[2]
Customer Relationships [Member]
Weighted Average Useful Lives (Years)	14 years 255 days	[1]	18 years
Gross Carrying Amount	126,301	[1]	111,723	[2]
Accumulated Amortization	(19,684)	[1]	(12,638)	[2]
Net Carrying Amount	106,617	[1]	99,085	[2]
Patents and Acquired Technology [Member]
Weighted Average Useful Lives (Years)	18 years 36 days	[1]	19 years
Gross Carrying Amount	55,672	[1]	53,906	[2]
Accumulated Amortization	(21,244)	[1]	(19,608)	[2]
Net Carrying Amount	$ 34,428	[1]	$ 34,298	[2]

[1] During 2012, the Company recorded $1.4 million in patents and acquired technology to be amortized over a weighted average life of twenty years and $14.4 million in customer relationships to be amortized over a weighted average life of fifteen years related to the acquisitions discussed in Note 1 of this report.

[2] 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 2011 acquisitions discussed in Note 1.