Segment Reporting (Reconciliation of Capital Expenditures by Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Capital expenditures	$ 16,719	$ 12,910	$ 8,278
Operating Segments
Segment Reporting Information [Line Items]
Capital expenditures	16,719	12,910	9,001
Operating Segments | Medical Office Buildings
Segment Reporting Information [Line Items]
Capital expenditures	5,309	7,582	4,037
Operating Segments | Triple-Net Leased Healthcare Facilities
Segment Reporting Information [Line Items]
Capital expenditures	396	1,152	154
Operating Segments | Seniors Housing Communities
Segment Reporting Information [Line Items]
Capital expenditures	$ 11,014	$ 4,176	$ 4,810