Credit Concentration - Top Five Tenant Credit Concentrations (Details) - Sales Revenue, Services, Net $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Rate
Concentration Risk [Line Items]
Total ABR | $	$ 219,129
Percent of ABR | Rate	100.00%
CHI - KentuckyOne Health | Customer Concentration Risk
Concentration Risk [Line Items]
Total ABR | $	$ 12,805
Percent of ABR | Rate	5.80%
CHI - Nebraska | Customer Concentration Risk
Concentration Risk [Line Items]
Total ABR | $	$ 9,275
Percent of ABR | Rate	4.20%
CHI - Franciscan (Seattle-Tacoma) | Customer Concentration Risk
Concentration Risk [Line Items]
Total ABR | $	$ 5,437
Percent of ABR | Rate	2.50%
CHI - St. Alexius (North Dakota) | Customer Concentration Risk
Concentration Risk [Line Items]
Total ABR | $	$ 5,278
Percent of ABR | Rate	2.40%
Great Falls Hospital | Customer Concentration Risk
Concentration Risk [Line Items]
Total ABR | $	$ 5,151
Percent of ABR | Rate	2.40%
Remaining portfolio | Customer Concentration Risk
Concentration Risk [Line Items]
Total ABR | $	$ 181,183
Percent of ABR | Rate	82.70%