Reportable Segments Reportable Segments (Revenue Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Document Fiscal Year Focus	2016
Net operating property income, including discontinued operations	$ 59,513	$ 58,053
Rental property operating expenses	(35,609)	(37,954)
Net operating income in joint venture	(6,646)	5,988
Net operating income from discontinued operations not included in revenues		14
Total consolidated revenues	$ 91,251	$ 91,976