Note 12 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Text Block]

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

	June 30, 2013					December 31, 2012
	Carrying Amounts			Estimated Fair Value		Carrying Amounts		Estimated Fair Value
Marketable securities (1)	$	71,009	$		71,277	$	36,541	$	36,825
Notes payable (2)	$	3,284,014	$		3,446,142	$	3,192,127	$	3,408,632
Mortgages payable (3)	$	1,180,760	$		1,238,727	$	1,003,190	$	1,068,616

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

	Balance at June 30, 2013		Level 1		Level 2		Level 3
Marketable equity securities	$	67,979	$	67,979	$	-	$	-

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

	Balance at June 30, 2013		Level 1		Level 2		Level 3
Real estate	$	39,506	$	-	$	-	$	39,506
Cost method investment	$	6,976	$	-	$	-	$	6,976

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