Note 9 - Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2016

Notes Tables

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

	March 31, 2016				December 31, 2015
	Carrying Amounts		Estimated Fair Value		Carrying Amounts		Estimated Fair Value
Marketable securities (1)	$	5,716	$	5,771	$	7,565	$	7,564
Notes payable (2)	$	3,660,666	$	3,750,443	$	3,761,328	$	3,820,205
Mortgages payable (3)	$	1,501,796	$	1,521,165	$	1,614,982	$	1,629,760

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

	Balance at March 31, 2016		Level 1		Level 2		Level 3
Assets:
Marketable equity securities	$	4,060	$	4,060	$	-	$	-
Liabilities:
Interest rate swaps (1)	$	2,029	$	-	$	2,029	$	-

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

	Balance at March 31, 2016		Level 1		Level 2		Level 3
Real estate	$	13,000	$	-	$	-	$	13,000

	Balance at December 31, 2015		Level 1		Level 2		Level 3
Real estate	$	52,439	$	-	$	-	$	52,439