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

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

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

	December 31,
	2015				2014
	Carrying Amounts		Estimated Fair Value		Carrying Amounts		Estimated Fair Value
Marketable Securities (1)	$	7,565	$	7,564	$	90,235	$	90,035
Notes Payable (2)	$	3,761,328	$	3,820,205	$	3,171,742	$	3,313,936
Mortgages Payable (3)	$	1,614,982	$	1,629,760	$	1,424,228	$	1,481,138

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

	Balance at December 31, 2015		Level 1		Level 2		Level 3
Assets:
Marketable equity securities	$	5,909	$	5,909	$	-	$	-
Liabilities:
Interest rate swaps	$	1,426	$	-	$	1,426	$	-

	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, 2015		Level 1		Level 2		Level 3
Real estate	$	52,439	$	-	$	-	$	52,439

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