Note 15 - Fair Value Disclosure of Financial Instruments (Details) - Financial Instruments: Estimate of Fair Value Differs from Carrying Amounts (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Financial Instruments: Estimate of Fair Value Differs from Carrying Amounts [Abstract]
Marketable Securities (1)	$ 90,235		$ 62,766
Marketable Securities (1)	90,035	[1]	62,824	[1]
Notes Payable (2)	3,192,167		3,186,047
Notes Payable (2)	3,334,361	[2]	3,333,614	[2]
Mortgages Payable (3)	1,428,131		1,035,354
Mortgages Payable (3)	$ 1,485,041	[3]	$ 1,083,801	[3]

[1] As of December 31, 2014 and 2013, the Company determined that $87.7 million and $59.7 million respectively, of the Marketable securities estimated fair value were classified within Level 1 of the fair value hierarchy and the remaining $2.3 million and $3.1 million, respectively, were classified within Level 3 of the fair value hierarchy.

[2] The Company determined that its valuation of these Notes Payable was classified within Level 2 of the fair value hierarchy.

[3] The Company determined that its valuation of these Mortgages Payable was classified within Level 3 of the fair value hierarchy.