Note 19 - Restructuring Costs (Details Textual) $ in Thousands	3 Months Ended		12 Months Ended			24 Months Ended
	Dec. 31, 2018 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)
Asset Impairment Charges, Total					$ 8,247
Number of Real Estate Properties Sold During Period	1		4	3		7
Real Estate Held-for-sale	$ 4,700		$ 4,700	$ 8,300		$ 8,300
Number of Real Estate Properties Put Back into Service	1	1
Real Estate Previously Held-for-sale Put Back Into Service	$ 2,600	$ 1,400
Operating Segments [Member]
Restructuring and Related Costs, Incurred Cost, Total					8,900
Operating Segments [Member] | Selling, General and Administrative Expenses [Member]
Asset Impairment Charges, Total					$ 8,200