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Note 8 - Goodwill and Intangible Assets (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Amortization of Intangible Assets $ 23,591 $ 21,024 $ 25,819
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 29,184    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 25,832    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 15,535    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 13,835    
Finite-Lived Intangible Assets, Amortization Expense, Year Five $ 13,762