Note 8 - Goodwill and Intangible Assets (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Goodwill, Impairment Loss			$ 0	$ 0
Impairment of Intangible Assets (Excluding Goodwill)			0	0
Amortization of Intangible Assets	$ 4,235,000	$ 3,213,000	12,365,000	$ 8,715,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	16,300,000		16,300,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	11,500,000		11,500,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	9,000,000		9,000,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	6,100,000		6,100,000
Finite-Lived Intangible Assets, Amortization Expense, Year Six	$ 3,200,000		$ 3,200,000