Note 12 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2014

Fair Value Disclosures [Abstract]

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

	June 30, 2014				December 31, 2013
	Carrying Amounts		Estimated Fair Value		Carrying Amounts		Estimated Fair Value
Marketable securities (1)	$	75,019	$	74,969	$	62,766	$	62,824
Notes payable (2)	$	3,533,306	$	3,658,419	$	3,186,047	$	3,333,614
Mortgages payable (3)	$	1,197,065	$	1,254,995	$	1,035,354	$	1,083,801

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

	Balance at June 30, 2014		Level 1		Level 2		Level 3
Marketable equity securities	$	72,230	$	72,230	$	-	$	-

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

	Balance at June 30, 2014		Level 1		Level 2		Level 3
Real estate	$	113,644	$	-	$	-	$	113,644
Cost method investment	$	2,591	$	-	$	-	$	2,591

	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