Segment Reporting (Details 2) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Segment Reporting Information, Additional Information
Long-Lived Assets	$ 3,723,658	$ 3,689,002
Assets	4,633,769	4,613,190
Corporate
Segment Reporting Information, Additional Information
Long-Lived Assets	0	0
Assets	115,665	78,582
Net Lease | Operating Segments
Segment Reporting Information, Additional Information
Long-Lived Assets	3,230,922	3,169,885
Assets	3,966,739	3,956,239
Self-Storage | Operating Segments
Segment Reporting Information, Additional Information
Long-Lived Assets	238,077	261,273
Assets	244,881	269,081
All Other | Operating Segments
Segment Reporting Information, Additional Information
Long-Lived Assets	254,659	257,844
Assets	$ 306,484	$ 309,288