Note 4 - Goodwill and Intangible Assets (Details) - Intangible Assets (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 273,991	$ 273,385
Accumulated Amortization	(67,501)	(64,102)
Net Carrying Amount	206,490	209,283
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	6 years
Gross Carrying Amount	3,913	3,917
Accumulated Amortization	(3,013)	(2,977)
Net Carrying Amount	900	940
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	0 years
Gross Carrying Amount	4,739	4,745
Accumulated Amortization	(4,739)	(4,745)
Net Carrying Amount	0	0
Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	13 years
Gross Carrying Amount	2,067	2,067
Accumulated Amortization	(514)	(477)
Net Carrying Amount	1,553	1,590
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	16 years
Gross Carrying Amount	21,476	21,394
Accumulated Amortization	(4,424)	(4,167)
Net Carrying Amount	17,052	17,227
Non-competes [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	4 years
Gross Carrying Amount	1,140	1,140
Accumulated Amortization	(775)	(753)
Net Carrying Amount	365	387
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	14 years
Gross Carrying Amount	182,643	182,703
Accumulated Amortization	(30,927)	(28,287)
Net Carrying Amount	151,716	154,416
Patents and acquired technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	17 years
Gross Carrying Amount	58,013	57,419
Accumulated Amortization	(23,109)	(22,696)
Net Carrying Amount	$ 34,904	$ 34,723