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Note 2 - Acquisitions (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Oct. 01, 2014
Jun. 30, 2015
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Note 2 - Acquisitions (Details) [Line Items]          
Payments to Acquire Businesses, Net of Cash Acquired     $ (233) $ 429  
Goodwill   $ 639,002 $ 639,002   $ 635,565
MAC Inc. [Member]          
Note 2 - Acquisitions (Details) [Line Items]          
Payments to Acquire Businesses, Net of Cash Acquired $ 55,690        
Business Acquisition Purchase Price Allocation Intangible Assets Including Goodwill 49,378        
Goodwill $ 25,898        
Increase Decrease In Intangible Assets Non Current   (3,272)      
Goodwill, Period Increase (Decrease)   $ 3,437