Real Estate Assets, Discontinued Operations and Assets Held for Sale (Tables)

3 Months Ended

Mar. 31, 2018

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Real Estate Properties [Table Text Block]

Real estate assets, excluding assets held for sale, consisted of the following (in thousands):

	March 31, 2018		December 31, 2017
Buildings and tenant improvements	$	4,668,740	$	4,642,832
Land and improvements	1,939,854		1,950,735
Real estate assets	$	6,608,594	$	6,593,567

Table Illustration of Number of Properties in Discontinued Operations

The following table illustrates the number of sold or held-for-sale properties included in, or excluded from, discontinued operations in this report: 

	Held-for-Sale at March 31, 2018	Sold Year-to-Date in 2018	Sold in 2017	Total
Total properties included in discontinued operations	—	—	81	81
Properties excluded from discontinued operations	2	6	17	25
Total properties sold or classified as held-for-sale	2	6	98	106

Table Illustration of Discontinued Operations in Statement of Operations

The following table illustrates the operational results of the buildings reflected in discontinued operations (in thousands):  

	Three Months Ended March 31,
	2018			2017
Revenues	$	5		$	46,239
Operating expenses	(13		)	(14,996		)
Depreciation and amortization	—			(19,534		)
Operating (loss) income	(8		)	11,709
Interest expense	—			(6,343		)
(Loss) income before gain on sales	(8		)	5,366
Gain on sale of depreciable properties	132			—
Income from discontinued operations	$	124		$	5,366

Allocation of Common Shareholders' Income (Loss) Between Continuing and Discontinued Operations

The following table illustrates the General Partner's share of the income attributable to common shareholders from continuing operations and discontinued operations, reduced by the allocation of income between continuing and discontinued operations to the noncontrolling interests (in thousands):

	Three Months Ended March 31,
	2018		2017
Income from continuing operations attributable to common shareholders	$	72,840	$	64,884
Income from discontinued operations attributable to common shareholders	123		5,316
Net income attributable to common shareholders	$	72,963	$	70,200

Schedule of Discontinued Operations, Properties Held-for-Sale, Aggregate Balance Sheet Information [Table Text Block]

he following table illustrates aggregate balance sheet information for all properties and land held for sale (in thousands):

	Held-for-Sale Properties Included in Continuing Operations
	March 31, 2018			December 31, 2017
Land and improvements	$	9,055		$	8,157
Buildings and tenant improvements	15,283			10,505
Undeveloped land	706			—
Accumulated depreciation	(4,824		)	(2,553		)
Deferred leasing and other costs, net	862			862
Other assets	658			579
Total assets held for sale	$	21,740		$	17,550
Total liabilities related to assets held for sale	$	1,327		$	1,163