Discontinued Operations - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of Real Estate	$ 5,400	$ 11,700	$ 0
Gain (loss) on sale of real estate from discontinued operations	$ 0	$ 10,463	32,493
Waterstone and Meridian
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of Real Estate			4,600
Gain (loss) on sale of real estate from discontinued operations			(5,600)
2013 Dispositions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of Real Estate			8,100
Gain (loss) on sale of real estate from discontinued operations			32,493
Parent Company | 2013 Dispositions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale of real estate from discontinued operations			$ 18,200