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Note 3 - Acquisitions (Details) - Preliminary Allocation of Purchase Price 2014 (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2014
Customer Relationships [Member]
2014 Acquisitions [Member]
Sep. 30, 2014
Trade Names [Member]
2014 Acquisitions [Member]
Sep. 30, 2014
Noncompete Agreements [Member]
2014 Acquisitions [Member]
Sep. 30, 2014
Unpatented Technology [Member]
2014 Acquisitions [Member]
Sep. 30, 2014
2014 Acquisitions [Member]
Note 3 - Acquisitions (Details) - Preliminary Allocation of Purchase Price 2014 [Line Items]              
Equipment and leasehold improvements             $ 886
Intangible assets     48,716 12,642 620 1,870  
Goodwill 504,627 369,312         138,561
Net deferred tax liability associated with step-up in book basis             (12,763)
Assets acquired and liabilities assumed, net             5,000
Total             $ 195,532