Accounting for the Impairment or Disposal of Long-Lived Assets (Tables)

12 Months Ended

Dec. 31, 2018

Accounting for the Impairment or Disposal of Long-Lived Assets [Abstract]

Schedule of Disposal Groups, Including Discontinued Operations

Information on the operating properties the Company sold during the years ended December 31, 2018, 2017 and 2016 is as follows:

2018 Sales

Reportable Segment	Number of Buildings	Acres of Developable Land (unaudited)	Leaseable Square Feet (unaudited)	Gross Proceeds (in thousands)
Carolinas/Richmond	1	1.5	80,000	$	7,094
Chicago/Minneapolis	—	8.3	—	2,714
Lehigh/Central PA	—	66.2	—	9,700
Philadelphia	1	3.1	207,779	130,818
United Kingdom	—	—	—	65,334		(1)
Other	37	—	3,130,785	657,708
Total	39	79.1	3,418,564	$	873,368

(1) The Company sold development rights in Horsham, UK.

2017 Sales

Reportable Segment	Number of Buildings	Acres of Developable Land (unaudited)	Leaseable Square Feet (unaudited)	Gross Proceeds (in thousands)
Chicago/Minneapolis	3	—	136,110	$	8,917
Florida	—	16.4	—	13,256
Houston	1	42.2	206,808	36,145
Lehigh/Central PA	2	44.3	1,683,876	249,045
Other	4	10.2	313,410	59,895
Total	10	113.1	2,340,204	$	367,258

2016 Sales

Reportable Segment	Number of Buildings	Acres of Developable Land (unaudited)	Leaseable Square Feet (unaudited)	Gross Proceeds (in thousands)
Chicago/Minneapolis	24	5.3	2,037,275	$	199,825
Dallas	1	—	197,600	12,000
Florida	51	12.1	3,509,641	505,828
Lehigh/Central PA	1	—	120,777	11,200
Philadelphia	—	1.0	—	2,640
Other	48	18.0	3,598,697	479,062
Total	125	36.4	9,463,990	$	1,210,555

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

	December 31, 2018									December 31, 2017
	Included in Continuing Operations			Included in Discontinued Operations			Total			Included in Continuing Operations			Included in Discontinued Operations			Total
Land and land improvements	$	1,301		$	113,080		$	114,381		$	3,476		$	176,312		$	179,788
Buildings and improvements	5,638			384,737			390,375			80,738			712,061			792,799
Development in progress	—			9,597			9,597			—			84,463			84,463
Land held for development	26,253			—			26,253			863			—			863
Accumulated depreciation	(1,546		)	(70,242		)	(71,788		)	(11,785		)	(216,890		)	(228,675		)
Deferred financing and leasing costs, net	58			13,697			13,755			2,210			27,010			29,220
Other assets	164			19,470			19,634			5,137			50,362			55,499
Assets held for sale	$	31,868		$	470,339		$	502,207		$	80,639		$	833,318		$	913,957
Liabilities held for sale	$	141		$	20,990		$	21,131		$	1,153		$	33,068		$	34,221

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 as of December 31, 2018	Sold during the year ended December 31, 2018	Sold during the year ended December 31, 2017	Total
Properties included in discontinued operations	22	37	2	61
Properties included in continuing operations	1	2	8	11
Properties sold or classified as held for sale	23	39	10	72

The following table illustrates the number of sold or held-for-sale properties included in discontinued operations by reportable segment:

Reportable Segment	Held for Sale as of December 31, 2018	Sold during the year ended December 31, 2018	Sold during the year ended December 31, 2017
Chicago/Minneapolis	1	—	—
Florida	3	—	—
Houston	—	—	1
Philadelphia	9	—	—
United Kingdom	2	—	—
Other	7	37	1
Total	22	37	2

A summary of the results of operations for the properties classified as discontinued operations through the respective disposition dates is as follows (in thousands):

	For the Year Ended
	December 31, 2018			December 31, 2017			December 31, 2016
Revenue
Rental	$	70,315		$	83,696		$	67,288
Operating expense reimbursement	20,670			33,650			27,835
Total Revenue	90,985			117,346			95,123
Expenses
Rental property	12,717			23,104			18,575
Real estate taxes	8,970			12,910			7,964
Other operating expense	100			(182		)	218
Interest expense	7,800			8,916			12,119
Depreciation and amortization	13,192			25,805			19,312
Impairment charges - real estate assets	7,257			6,686			—
Total Expense	50,036			77,239			58,188
Interest and other income	(185		)	(280		)	(104		)
Gain on property dispositions	303,159			14,578			—
Income taxes	(106		)	(99		)	(97		)
Income from discontinued operations	343,817			54,306			36,734
Noncontrolling interest - operating partnership	(8,011		)	(1,271		)	(856		)
Noncontrolling interest – consolidated joint ventures	(495		)	(511		)	(258		)
Income available to common shareholders	$	335,311		$	52,524		$	35,620

Schedule of Significant Sale

A summary of net income (excluding gain on sale) related to this portfolio is as follows (in thousands):

	Year Ended
	December 31, 2016
Net income	$	48,609
Noncontrolling interest - operating partnership	(1,142		)
Income available to common shareholders	$	47,467

Schedule of Asset Impairment Charges

The impairment losses are for operating properties or land parcels and were in the reportable segments and for the amounts as indicated below (in thousands):

	Year Ended December 31,
Reportable Segment	2018		2017		2016
Florida	$	2,396	$	—	$	—
Houston	—		10,632		—
Chicago/Minneapolis	2,456		—		3,879
Philadelphia	26,000		—		—
Other	8,836		—		—
Total	$	39,688	$	10,632	$	3,879