Segment Reporting (Schedule of Capital Additions by Reportable Segments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Capital additions by segment [Line Items]
Total capital additions	$ 4,501	$ 10,432
Operating Segments [Member] | Data Centers [Member]
Capital additions by segment [Line Items]
Total capital additions	58	182
Operating Segments [Member] | Healthcare [Member]
Capital additions by segment [Line Items]
Total capital additions	$ 4,443	$ 10,250