Note 12 - Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

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

	September 30, 2013				December 31, 2012
	Carrying Amounts		Estimated Fair Value		Carrying Amounts		Estimated Fair Value
Marketable securities (1)	$	88,656	$	88,939	$	36,541	$	36,825
Notes payable (2)	$	3,254,881	$	3,430,921	$	3,192,127	$	3,408,632
Mortgages payable (3)	$	1,125,771	$	1,181,135	$	1,003,190	$	1,068,616

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

	Balance at September 30, 2013		Level 1		Level 2		Level 3
Marketable equity securities	$	85,640	$	85,640	$	-	$	-

	Balance at December 31, 2012		Level 1		Level 2		Level 3
Marketable equity securities	$	33,428	$	33,428	$	-	$	-

	Balance at September 30, 2013		Level 1		Level 2		Level 3
Real estate	$	302,702	$	-	$	-	$	302,702
Joint venture investments	$	1,395	$	-	$	-	$	1,395
Cost method investment	$	4,992	$	-	$	-	$	4,992

	Balance at December 31, 2012		Level 1		Level 2		Level 3
Real estate	$	52,505	$	-	$	-	$	52,505