Segment Reporting (Details 2) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Segment Reporting Information, Additional Information
Long-Lived Assets	$ 1,727,354	$ 1,647,128
Assets	2,227,115	2,134,683
Corporate
Segment Reporting Information, Additional Information
Long-Lived Assets	0	0
Assets	94,920	86,294
Net Lease | Operating Segments
Segment Reporting Information, Additional Information
Long-Lived Assets	1,159,877	1,105,237
Assets	1,506,409	1,446,865
Self Storage | Operating Segments
Segment Reporting Information, Additional Information
Long-Lived Assets	332,898	314,247
Assets	381,249	363,284
All Other | Operating Segments
Segment Reporting Information, Additional Information
Long-Lived Assets	234,579	227,644
Assets	$ 244,537	$ 238,240