Note 4 - Goodwill and Intangible Assets (Detail) - Intangible Assets (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2011	Dec. 31, 2010
Gross Carrying Amount	$ 133,553	$ 102,084
Accumulated Amortization	(32,724)	(28,937)
Net Carrying Amount	100,829	73,147
Licensing Agreements [Member]
Weighted Average Useful Lives (Years)	9
Gross Carrying Amount	3,928	3,895
Accumulated Amortization	(2,579)	(2,465)
Net Carrying Amount	1,349	1,430
Contract Backlog [Member]
Weighted Average Useful Lives (Years)	1
Gross Carrying Amount	5,560	3,010
Accumulated Amortization	(3,010)	(2,999)
Net Carrying Amount	2,550	11
Leases [Member]
Weighted Average Useful Lives (Years)	19
Gross Carrying Amount	1,237	1,237
Accumulated Amortization	(120)	(95)
Net Carrying Amount	1,117	1,142
Trademarks And Tradenames [Member]
Weighted Average Useful Lives (Years)	18
Gross Carrying Amount	15,790	14,400
Accumulated Amortization	(1,650)	(1,290)
Net Carrying Amount	14,140	13,110
Noncompete Agreements [Member]
Weighted Average Useful Lives (Years)	5
Gross Carrying Amount	2,015	740
Accumulated Amortization	(691)	(589)
Net Carrying Amount	1,324	151
Customer Relationships [Member]
Weighted Average Useful Lives (Years)	14
Gross Carrying Amount	72,131	53,307
Accumulated Amortization	(8,181)	(6,530)
Net Carrying Amount	63,950	46,777
Patents [Member]
Weighted Average Useful Lives (Years)	18
Gross Carrying Amount	32,892	25,495
Accumulated Amortization	(16,493)	(14,969)
Net Carrying Amount	$ 16,399	$ 10,526

The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph a(1)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: 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=6905858&loc=d3e16323-109275

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- Definition

The average useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16265-109275

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- Definition

Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

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- Definition

The aggregate sum of gross carrying value of a major finite-lived intangible asset class, less accumulated amortization and any impairment charges. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

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