Subsequent Events (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 18, 2018	Jul. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Subsequent Event [Line Items]
Gross proceeds					$ 47,547	$ 170,485
Remaining offering amount available			$ 187,900		187,900
Purchase price					47,369
Anticipated initial annual lease revenues					4,275
Long-term Debt			$ 544,338		$ 544,338		$ 558,912
At-The-Market Offering
Subsequent Event [Line Items]
Issuance of common stock, net, (in shares)			2,989	0	2,989
Average sales price per share (in usd per share)			$ 16.13	$ 0.00	$ 16.13
Gross proceeds			$ 48,198	$ 0	$ 48,198
At-The-Market Offering | Subsequent Event
Subsequent Event [Line Items]
Issuance of common stock, net, (in shares)		1,900
Average sales price per share (in usd per share)		$ 17.11
Gross proceeds		$ 32,000
Remaining offering amount available		155,900
Skilled Nursing Properties
Subsequent Event [Line Items]
Purchase price					47,369
Anticipated initial annual lease revenues					4,275
Skilled Nursing Properties | Subsequent Event
Subsequent Event [Line Items]
Purchase price	$ 9,700
Eduro Amended Master Lease | Subsequent Event
Subsequent Event [Line Items]
Anticipated initial annual lease revenues	$ 870
Revolving Facility
Subsequent Event [Line Items]
Long-term Debt			$ 150,000		$ 150,000		$ 165,000
Revolving Facility | Subsequent Event
Subsequent Event [Line Items]
Repayment on credit facility		20,000
Long-term Debt		$ 130,000