Organization and Business Operations (Details)		6 Months Ended
	Jun. 30, 2016 USD ($) real_estate_investment property metropolitan $ / shares shares	Jun. 30, 2016 USD ($) real_estate_investment segment property metropolitan $ / shares shares	Jun. 30, 2015 USD ($)	Dec. 31, 2015 $ / shares shares	Nov. 25, 2015 USD ($) $ / shares shares
Organization and Business Operations [Line Items]
Number of reportable business segments | segment		2
Number of Company owned real estate investments | real_estate_investment	49	49
Number of Company owned properties | property	84	84
Number of metropolitan statistical areas in which Company owns real estate investments | metropolitan	46	46
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01		$ 0.01
Common stock, shares authorized | shares	300,000,000	300,000,000		300,000,000
Redemption of common stock		$ 16,996,000	$ 3,191,000
Second DRIP Offering [Member]
Organization and Business Operations [Line Items]
Common stock, shares authorized | shares					10,473,946
Share price (in dollars per share) | $ / shares					$ 9.5475
Common stock offering, value authorized					$ 100,000,000
Initial Public Offering and DRIP Offerings [Member]
Organization and Business Operations [Line Items]
Common stock offering, shares issued | shares	186,235,000
Common stock offering, gross proceeds raised	$ 1,845,820,000
Redemption of common stock	31,523,000
Offering costs, selling commissions and dealer manager fees	$ 174,784,000
Private Healthcare Real Estate Corporation [Member] | Series B Redeemable Cumulative Preferred Stock [Member]
Organization and Business Operations [Line Items]
Preferred equity investment, dividend rate percentage		7.875%
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Consolidated Partnership [Member]
Organization and Business Operations [Line Items]
Number of Company owned real estate investments | real_estate_investment	1	1