Note 3 - Discontinued Operations (Details) (USD $)				9 Months Ended					9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Sold [Member] Operating Properties [Member]	Sep. 30, 2014 Sold [Member] Assets Held-for-sale [Member] Discontinued Operations [Member] Impaired Operating Properties [Member]	Sep. 30, 2014 Operating Properties [Member] Initial [Member] Assets Held-for-sale [Member] Discontinued Operations [Member]	Sep. 30, 2014 Operating Properties [Member] Assets Held-for-sale [Member] Discontinued Operations [Member] Other Assets [Member]	Sep. 30, 2014 Non-Impaired Operating Properties [Member] Assets Held-for-sale [Member] Discontinued Operations [Member]	Sep. 30, 2014 Assets Held-for-sale [Member] Discontinued Operations [Member] Operating Properties [Member]	Sep. 30, 2014 Assets Held-for-sale [Member] Discontinued Operations [Member] Impaired Operating Properties [Member]	Sep. 30, 2014 Assets Held-for-sale [Member] Operating Properties [Member]
Note 3 - Discontinued Operations (Details) [Line Items]
Number of Real Estate Properties			15	3	35	20	24		11	150
Real Estate Held-for-sale						$ 95,200,000		$ 239,900,000
Real Estate Investment Property, Accumulated Depreciation	1,937,463,000	1,878,681,000				43,400,000		76,500,000
Impairment of Real Estate				7,100,000					56,200,000
Fair Value of Real Estate	$ 228,798,000	$ 217,529,000						$ 316,500,000