Note 9 - Goodwill and Intangible Assets (Details) - Summary of Finite Lived Intangible Assets (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Cost	$ 450,472	$ 436,883
Accumulated amortization	(348,278)	(327,254)
Amortized cost	102,194us-gaap_FiniteLivedIntangibleAssetsNet	109,629us-gaap_FiniteLivedIntangibleAssetsNet
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization years	0 years
Cost	8,775	8,775
Accumulated amortization	(8,775)	(8,775)
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization years	8 years
Cost	304,180	294,627
Accumulated amortization	(263,178)	(251,863)
Amortized cost	41,002	42,764
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization years	15 years
Cost	121,341	118,921
Accumulated amortization	(64,447)	(56,503)
Amortized cost	56,894	62,418
Unpatented Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization years	13 years
Cost	13,169	13,169
Accumulated amortization	(10,435)	(9,064)
Amortized cost	2,734	4,105
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization years	8 years
Cost	1,046	1,046
Accumulated amortization	(1,037)	(912)
Amortized cost	9	134
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization years	7 years
Cost	1,961	345
Accumulated amortization	(406)	(137)
Amortized cost	$ 1,555	$ 208

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

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+ References

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- Definition

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+ References

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