Segment Reporting (Schedule of Capital Additions and Acquisitions by Reportable Segments) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Capital additions and acquisitions by segment [Line Items]
Total capital additions and acquisitions	$ 101,830	$ 146,880
Operating Segments [Member] | Data Centers [Member]
Capital additions and acquisitions by segment [Line Items]
Total capital additions and acquisitions	7,139	116
Operating Segments [Member] | Healthcare [Member]
Capital additions and acquisitions by segment [Line Items]
Total capital additions and acquisitions	$ 94,691	$ 146,764