Note 2 - Basis of Presentation, Consolidation, Investments in Joint Ventures, and Noncontrolling Interests (Details) - Weighted Average Interests in Operating Partnership (Operating Partnership [Member])	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Partnership [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Company’s weighted average basic interest in Operating Partnership	95.20%	92.00%
Limited partners' redeemable noncontrolling weighted average basic interests in Operating Partnership	4.80%	8.00%