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

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	December 31,
	2019				2018
	Carrying Amounts		Estimated Fair Value		Carrying Amounts		Estimated Fair Value
Notes payable, net (1)	$	4,831,759	$	4,983,763	$	4,381,456	$	4,126,450
Mortgages and construction loan payable, net (2)	$	484,008	$	486,042	$	492,416	$	486,341

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

	Balance at December 31, 2019		Level 1		Level 2		Level 3
Assets:
Marketable equity securities (1)	$	9,353	$	9,353	$	-	$	-

	Balance at December 31, 2018		Level 1		Level 2		Level 3
Assets:
Marketable equity securities (1)	$	9,045	$	9,045	$	-	$	-

	Balance at December 31, 2019		Level 1		Level 2		Level 3
Real estate	$	39,510	$	-	$	-	$	39,510
Other real estate investments	$	32,974	$	-	$	-	$	32,974

	Balance at December 31, 2018		Level 1		Level 2		Level 3
Real estate	$	99,693	$	-	$	-	$	99,693
Investments in real estate joint ventures (1)	$	62,429	$	-	$	-	$	62,429