Note 15 - Fair Value Disclosure of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value, by Balance Sheet Grouping [Table Text Block]

	December 31,
	2014				2013
	Carrying Amounts		Estimated Fair Value		Carrying Amounts		Estimated Fair Value
Marketable Securities (1)	$	90,235	$	90,035	$	62,766	$	62,824
Notes Payable (2)	$	3,192,167	$	3,334,361	$	3,186,047	$	3,333,614
Mortgages Payable (3)	$	1,428,131	$	1,485,041	$	1,035,354	$	1,083,801

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

	Balance at December 31, 2014		Level 1		Level 2		Level 3
Assets:
Marketable equity securities	$	87,659	$	87,659	$	-	$	-
Liabilities:
Interest rate swaps	$	1,404	$	-	$	1,404	$	-

	Balance at December 31, 2013		Level 1		Level 2		Level 3
Marketable equity securities	$	59,723	$	59,723	$	-	$	-

	Balance at December 31, 2014		Level 1		Level 2		Level 3
Real estate	$	80,270	$	-	$	-	$	80,270

	Balance at December 31, 2013		Level 1		Level 2		Level 3
Real estate	$	217,529	$	-	$	-	$	217,529
Joint venture investments	$	59,693	$	-	$	-	$	59,693
Other real estate investments	$	2,050	$	-	$	-	$	2,050
Cost method investment	$	4,670	$	-	$	-	$	4,670