Segment Information (Details 2) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information, Additional Information
Long-Lived Assets	$ 3,689,002	$ 3,593,287
Assets	4,626,015	4,605,897
Operating Segments | Net Lease
Segment Reporting Information, Additional Information
Long-Lived Assets	3,169,885	3,078,900
Assets	3,967,026	3,800,141
Operating Segments | Self-Storage
Segment Reporting Information, Additional Information
Long-Lived Assets	261,273	270,790
Assets	270,769	285,320
Operating Segments | All Other
Segment Reporting Information, Additional Information
Long-Lived Assets	257,844	243,597
Assets	309,310	298,061
Corporate
Segment Reporting Information, Additional Information
Long-Lived Assets	0	0
Assets	$ 78,910	$ 222,375