Real Estate (Held For Sale) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) property	Dec. 31, 2014 USD ($) property	Dec. 31, 2013 property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties classified as held for sale | property	6	11
Land and improvements	$ 9,419	$ 11,518
Building and improvements	27,881	32,525
Real estate held for sale, gross	37,300	44,043
Less impairment	(215)	(1,022)
Real estate held for sale, net	$ 32,666	$ 38,074
Discontinued operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of sold properties | property	0	2	35
Assets Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Less accumulated depreciation and amortization	$ (4,419)	$ (4,947)
Assets Held-for-sale | Discontinued operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of sold properties | property	5