Real Estate Properties (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 building property	Mar. 31, 2014
Real estate properties
Number of properties that met the criteria for discontinued operations	4
Number of buildings that met the criteria for discontinued operations	7
(Loss) income from discontinued operations	$ (241)	$ 1,300
MOBs
Real estate properties
Number of properties that met the criteria for discontinued operations	1	4
Number of buildings that met the criteria for discontinued operations	4	7
Rental income	32	2,294
Property operating expenses	(273)	(994)
(Loss) income from discontinued operations	$ (241)	$ 1,300