Note 3 - Discontinued Operations (Details) (USD $)							3 Months Ended
	Mar. 31, 2014		Dec. 31, 2013	Mar. 31, 2014 Remaining [Member] Assets Held-for-sale [Member]	Mar. 31, 2014 Sold [Member] Operating Properties [Member]	Mar. 31, 2014 Assets Held-for-sale [Member] Operating Properties [Member]	Mar. 31, 2014 Assets Held-for-sale [Member] Eight Operating Properties [Member]
Note 3 - Discontinued Operations (Details) [Line Items]
Number of Real Estate Properties					5	2
Gross Leasable Area	915	[1]				404,393
Real Estate Held-for-sale				$ 35,900,000
Real Estate Investment Property, Accumulated Depreciation	1,916,505,000		1,878,681,000	6,700,000
Impairment of Real Estate							900,000
Fair Value of Real Estate	$ 9,727,000		$ 217,529,000				$ 38,600,000

[1] Gross leasable area ("GLA")