Note 11 - Fair Value Measurements (Details) - USD ($) $ in Thousands		9 Months Ended		12 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Note 11 - Fair Value Measurements (Details) [Line Items]
Marketable Securities	[1]	$ 12,189		$ 90,235
Asset Impairment Charges		27,989	$ 107,034	107,000
Impairment of Real Estate		2,200
Cost-method Investments, Other than Temporary Impairment		4,800
Discontinued Operations [Member]
Note 11 - Fair Value Measurements (Details) [Line Items]
Asset Impairment Charges		100		78,600
Fair Value, Estimate Not Practicable, Carrying (Reported) Amount [Member]
Note 11 - Fair Value Measurements (Details) [Line Items]
Impairment of Real Estate		21,900		102,200
Other Real Estate Investments [Member]
Note 11 - Fair Value Measurements (Details) [Line Items]
Asset Impairment Charges		5,300
Certain Marketable Securities [Member]
Note 11 - Fair Value Measurements (Details) [Line Items]
Asset Impairment Charges		800
Fair Value, Inputs, Level 1 [Member]
Note 11 - Fair Value Measurements (Details) [Line Items]
Marketable Securities		10,500		87,700
Fair Value, Inputs, Level 3 [Member]
Note 11 - Fair Value Measurements (Details) [Line Items]
Marketable Securities		$ 1,700		$ 2,300

[1] As of September 30, 2015 and December 31, 2014, the Company determined that $10.5 million and $87.7 million, respectively, of the Marketable securities estimated fair value were classified within Level 1 of the fair value hierarchy and the remaining $1.7 million and $2.3 million, respectively, were classified within Level 3 of the fair value hierarchy.