Credit Concentration - Schedule of ABR (Annualized Base Rent) (Details) - Sales Revenue, Services, Net $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) Rate
Concentration Risk [Line Items]
Total ABR (annualized base rent) | $	$ 234,161
Percent of ABR (annualized base rent) | Rate	100.00%
Customer Concentration Risk | CHI - KentuckyOne Health
Concentration Risk [Line Items]
Total ABR (annualized base rent) | $	$ 12,808
Percent of ABR (annualized base rent) | Rate	5.50%
Customer Concentration Risk | CHI - Nebraska
Concentration Risk [Line Items]
Total ABR (annualized base rent) | $	$ 11,400
Percent of ABR (annualized base rent) | Rate	4.90%
Customer Concentration Risk | CHI - Franciscan (Seattle - Tacoma)
Concentration Risk [Line Items]
Total ABR (annualized base rent) | $	$ 5,463
Percent of ABR (annualized base rent) | Rate	2.30%
Customer Concentration Risk | CHI - St. Alexius (North Dakota)
Concentration Risk [Line Items]
Total ABR (annualized base rent) | $	$ 5,278
Percent of ABR (annualized base rent) | Rate	2.20%
Customer Concentration Risk | Great Falls Hospital
Concentration Risk [Line Items]
Total ABR (annualized base rent) | $	$ 5,194
Percent of ABR (annualized base rent) | Rate	2.20%
Customer Concentration Risk | Remaining portfolio
Concentration Risk [Line Items]
Total ABR (annualized base rent) | $	$ 194,018
Percent of ABR (annualized base rent) | Rate	82.90%
Geographic Concentration Risk | Texas
Concentration Risk [Line Items]
Total ABR (annualized base rent) | $	$ 31,674
Percent of ABR (annualized base rent) | Rate	13.50%
Geographic Concentration Risk | Kentucky
Concentration Risk [Line Items]
Total ABR (annualized base rent) | $	$ 15,685
Percent of ABR (annualized base rent) | Rate	6.70%
Geographic Concentration Risk | New York
Concentration Risk [Line Items]
Total ABR (annualized base rent) | $	$ 14,204
Percent of ABR (annualized base rent) | Rate	6.10%
Geographic Concentration Risk | Arizona
Concentration Risk [Line Items]
Total ABR (annualized base rent) | $	$ 14,083
Percent of ABR (annualized base rent) | Rate	6.00%
Geographic Concentration Risk | Florida
Concentration Risk [Line Items]
Total ABR (annualized base rent) | $	$ 12,889
Percent of ABR (annualized base rent) | Rate	5.50%
Geographic Concentration Risk | Other
Concentration Risk [Line Items]
Total ABR (annualized base rent) | $	$ 145,626
Percent of ABR (annualized base rent) | Rate	62.20%