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

6 Months Ended

Jun. 30, 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):

	June 30, 2018		December 31, 2017
Buildings and tenant improvements	$	4,712,182	$	4,642,832
Land and improvements	2,073,309		1,950,735
Real estate assets	$	6,785,491	$	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 June 30, 2018	Sold Year-to-Date in 2018	Sold in 2017	Total
Total properties included in discontinued operations	—	—	81	81
Properties excluded from discontinued operations	—	13	17	30
Total properties sold or classified as held-for-sale	—	13	98	111

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 June 30,					Six Months Ended June 30,
	2018		2017			2018			2017
Revenues	$	27	$	35,165		$	32		$	81,404
Operating expenses	4		(11,170		)	(9		)	(26,166		)
Depreciation and amortization	—		(6,315		)	—			(25,849		)
Operating income	31		17,680			23			29,389
Interest expense	—		(6,585		)	—			(14,204		)
Income before gain on sales and income taxes	31		11,095			23			15,185
Gain on sale of depreciable properties	2,889		1,109,091			3,021			1,109,091
Income from discontinued operations before income taxes	2,920		1,120,186			3,044			1,124,276
Income tax expense	—		(11,613		)	—			(11,613		)
Income from discontinued operations	$	2,920	$	1,108,573		$	3,044		$	1,112,663

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 June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Income from continuing operations attributable to common shareholders	$	190,952	$	118,194	$	263,792	$	184,362
Income from discontinued operations attributable to common shareholders	2,893		1,092,349		3,016		1,096,381
Net income attributable to common shareholders	$	193,845	$	1,210,543	$	266,808	$	1,280,743

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

The 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
	June 30, 2018		December 31, 2017
Land and improvements	$	—	$	8,157
Buildings and tenant improvements	—		10,505
Undeveloped land	—		—
Accumulated depreciation	—		(2,553		)
Deferred leasing and other costs, net	—		862
Other assets	—		579
Total assets held-for-sale	$	—	$	17,550
Total liabilities related to assets held-for-sale	$	—	$	1,163