Note 4 - Goodwill and Intangible Assets (Detail) - Intangible Assets (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Gross Carrying Amount	$ 215,077	$ 215,711
Accumulated Amortization	(55,288)	(53,433)
Net Carrying Amount	159,789	162,278
Licensing Agreements [Member]
Weighted Average Useful Lives	7 years
Gross Carrying Amount	3,922	3,925
Accumulated Amortization	(2,861)	(2,821)
Net Carrying Amount	1,061	1,104
Order or Production Backlog [Member]
Gross Carrying Amount	5,191	5,196
Accumulated Amortization	(5,191)	(5,196)
Lease Agreements [Member]
Weighted Average Useful Lives	13 years 6 months
Gross Carrying Amount	2,070	2,067
Accumulated Amortization	(365)	(331)
Net Carrying Amount	1,705	1,736
Trademarks [Member]
Weighted Average Useful Lives	16 years 328 days
Gross Carrying Amount	21,836	21,810
Accumulated Amortization	(3,680)	(3,417)
Net Carrying Amount	18,156	18,393
Noncompete Agreements [Member]
Gross Carrying Amount	740	740
Accumulated Amortization	(740)	(740)
Customer Relationships [Member]
Weighted Average Useful Lives	14 years 6 months
Gross Carrying Amount	126,111	126,301
Accumulated Amortization	(21,426)	(19,684)
Net Carrying Amount	104,685	106,617
Patents [Member]
Weighted Average Useful Lives	18 years 36 days
Gross Carrying Amount	55,207	55,672
Accumulated Amortization	(21,025)	(21,244)
Net Carrying Amount	$ 34,182	$ 34,428