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Note 9 - Intangible Assets (Details Textual) - USD ($)
$ in Thousands
Jan. 31, 2017
Jan. 31, 2016
Finite-Lived Intangible Assets, Net $ 145,445 $ 133,562
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 27,500  
Finite-Lived Intangible Assets, Amortization Expense, Year Two 25,400  
Finite-Lived Intangible Assets, Amortization Expense, Year Three 24,400  
Finite-Lived Intangible Assets, Amortization Expense, Year Four 20,900  
Finite-Lived Intangible Assets, Amortization Expense, Year Five 17,000  
Finite-Lived Intangible Assets, Amortization Expense, after Year Five $ 30,300