Discontinued Operations and Assets Held for Sale (Tables)

12 Months Ended

Dec. 31, 2014

Discontinued Operations and Disposal Groups [Abstract]

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:

	Held For Sale at December 31, 2014	Sold in 2014	Sold in 2013	Sold in 2012	Total
Office	0	0	12	10	22
Industrial	0	11	6	17	34
Medical Office	1	1	6	0	8
Retail	0	0	1	1	2
Total properties included in discontinued operations	1	12	25	28	66
Properties excluded from discontinued operations	1	17	13	0	31
Total properties sold or classified as held-for-sale	2	29	38	28	97

Table Illustration of Discontinued Operations in Income Statement

The following table illustrates the operations of the buildings reflected in discontinued operations for the years ended December 31, 2014, 2013 and 2012, respectively (in thousands):

	2014			2013			2012
Revenues	$	3,031		$	47,843		$	72,645
Operating expenses	(1,213		)	(18,014		)	(26,364		)
Depreciation and amortization	(205		)	(16,423		)	(31,151		)
Operating income	1,613			13,406			15,130
Interest expense	(921		)	(11,499		)	(18,846		)
Income (loss) before gain on sales	692			1,907			(3,716		)
Gain on sale of depreciable properties	22,763			133,242			13,467
Income from discontinued operations before income taxes	23,455			135,149			9,751
Income tax expense	(2,969		)	—			—
Income from discontinued operations	$	20,486		$	135,149		$	9,751

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

The following table illustrates the General Partner's share of the income (loss) attributable to common shareholders from continuing operations and discontinued operations, reduced by the allocation of income or loss between continuing and discontinued operations to noncontrolling interests, for the years ended December 31, 2014, 2013 and 2012, respectively (in thousands):

	2014		2013		2012
Income (loss) from continuing operations attributable to common shareholders	$	184,667	$	22,982	$	(135,724	)
Income from discontinued operations attributable to common shareholders	20,226		130,062		9,579
Net income (loss) attributable to common shareholders	$	204,893	$	153,044	$	(126,145	)

Schedule of Discontinued Operations, Properties Held-for-Sale, Aggregate Balance Sheet Information

The following table illustrates aggregate balance sheet information of these held-for-sale properties (in thousands):

	December 31, 2014			December 31, 2013
Land and improvements	$	26,614		$	8,603
Buildings and tenant improvements	47,782			53,324
Undeveloped land	12,443			—
Accumulated depreciation	(24,552		)	(14,351		)
Deferred leasing and other costs, net	7,642			6,435
Other assets	1,596			3,455
Total assets held-for-sale	$	71,525		$	57,466
Accrued expenses	$	428		$	1,481
Other liabilities	575			594
Total liabilities held-for-sale	$	1,003		$	2,075

Asset Impairment Charges [Text Block]

The following table illustrates impairment charges recognized during the years ended December 31, 2014 and 2013, respectively (in thousands):

	2014		2013
Impairment charges - land	$	33,700	$	3,777
Impairment charges - building	15,406		—
Impairment charges	$	49,106	$	3,777