Dispositions (Asseets and liabilities related to dispositions) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Dispositions
Real Estate, Net	$ 1,927		$ 2,642
Other Assets	2,489		2,928
Assets related to discontinued operations	4,416		5,570
Liabilities related to discontinued operations	2,670		$ 2,870
Income from discontinued operations:
Total revenues	324	$ 1,182
Total expenses	163	466
Income from discontinued operations before net gain on sale of real estate	161	716
Net gain on sale of real estate	2,267	0
Income from discontinued operations	2,428	716
Cash flows related to discontinued Operations:
Cash flows from operating activities, discontinued operations	(37)	1,654
Cash flows from investing activities, discontinued operations	$ 3,419	$ 0