Acquisitions, Dispositions, Impairment, and Discontinued operations (Tables)

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Line Items]

Disclosure of Long Lived Assets Held-for-sale [Table Text Block]

The operating properties, retail center, and land discussed above were classified as held for sale in the condensed consolidated balance sheet at December 31, 2015, and were made up of the following:

(in thousands)	December 31, 2015
Land	$	59,438
Buildings and improvements	373,419
	$	432,857
Accumulated depreciation	(197,996		)
Net operating real estate assets	$	234,861
Properties under development, including land	4,202
Discontinued operations held for sale, including land	$	239,063
Other assets related to properties held for sale	1,191
Total assets held for sale	$	240,254
Liabilities related to assets held for sale	$	1,654

Disposal Groups, Including Discontinued Operations [Table Text Block]

The following is a summary of income from discontinued operations for the years ended December 31, 2016, 2015, and 2014 relating to the 15 operating properties and the retail center sold in April 2016:

	Years Ended December 31,
(in thousands)	2016			2015			2014
Property revenues	$	19,184		$	57,310		$	53,715
Property expenses	(6,898		)	(20,716		)	(19,608		)
	$	12,286		$	36,594		$	34,107
Property management expense	(242		)	(706		)	(619		)
Depreciation and amortization	(4,327		)	(16,138		)	(15,291		)
Income tax expense	(112)			—			—
Income from discontinued operations	$	7,605		$	19,750		$	18,197
Gain on sale of discontinued operations, net of tax	$	375,237		$	—		$	—