Real Estate Properties - Schedule of Real Estate Properties (Details) - Disposal Group, Disposed of by Sale, Not Discontinued Operations $ in Thousands	1 Months Ended				6 Months Ended
	Jun. 30, 2019 USD ($) building	May 31, 2019 USD ($) building	Mar. 31, 2019 USD ($) building	Feb. 28, 2019 USD ($) building	Jun. 30, 2019 USD ($) building
Real Estate [Line Items]
Number of Properties | building	13				13
Gross Sales Price					$ 35,107
Gain (loss) on Sale					17,710
MOBs
Real Estate [Line Items]
Gross Sales Price					$ 13,607
MOBs | Florida
Real Estate [Line Items]
Number of Properties | building				1
Gross Sales Price				$ 2,900
Gain (loss) on Sale				$ (64)
MOBs | Massachusetts
Real Estate [Line Items]
Number of Properties | building	7		1		7
Gross Sales Price	$ 8,042		$ 75
Gain (loss) on Sale	$ 1,590		$ (58)
MOBs | Colorado
Real Estate [Line Items]
Number of Properties | building		1
Gross Sales Price		$ 2,590
Gain (loss) on Sale		1,035
SNF
Real Estate [Line Items]
Gross Sales Price		$ 21,500
SNF | California
Real Estate [Line Items]
Number of Properties | building		3
Gross Sales Price		$ 21,500
Gain (loss) on Sale		$ 15,207