Note 2 - Real Estate (Tables)

12 Months Ended

Dec. 31, 2015

Real Estate [Abstract]

Schedule of Property Subject to or Available for Operating Lease [Table Text Block]

	December 31,
	2015			2014
Land	$	2,660,722		$	2,291,338
Undeveloped land		67,535			74,462
Buildings and improvements:
Buildings		5,643,629			4,909,152
Building improvements		1,559,652			1,349,028
Tenant improvements		727,036			658,868
Fixtures and leasehold improvements		47,055			61,122
Above market leases		155,451			121,774
In-place leases		509,435			399,293
Tenant relationships		19,104			20,858
		11,389,619			9,885,895
Accumulated depreciation and amortization (1)		(2,115,320	)		(1,955,406	)
Total	$	9,274,299		$	7,930,489

Above and Below Market Lease, Tenant Relationships, Future Amortization Income (Expense) [Table Text Block]

	2016			2017			2018			2019			2020
Above and below market leases amortization, net	$	10.3		$	9.9		$	9.9		$	10.5		$	10.8
Tenant relationships and leases in place amortization	$	(53.1	)	$	(39.0	)	$	(28.5	)	$	(22.1	)	$	(16.3	)