Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Rental income									$ 155,667
Rental income										$ 140,073	$ 117,633
Tenant reimbursements										11,924	10,254
Independent living facilities									3,389	3,379	3,228
Interest and other income									4,345	1,565	1,867
Total revenues	$ 44,228	$ 33,314	$ 46,201	$ 39,658	$ 40,361	$ 39,510	$ 38,969	$ 38,101	163,401	156,941	132,982
Expenses:
Depreciation and amortization									51,822	45,766	39,159
Interest expense									28,125	27,860	24,196
Loss on the extinguishment of debt									0	0	11,883
Property taxes									3,048	11,924	10,254
Independent living facilities									2,898	2,964	2,733
Impairment of real estate investments									16,692	0	890
Provision for loan losses									1,076	0	0
Reserve for advances and deferred rent									0	0	10,414
General and administrative									15,158	12,555	11,117
Total expenses									118,819	101,069	110,646
Other income:
Gain on sale of real estate									1,777	2,051	0
Gain on disposition of other real estate investment									0	0	3,538
Net income	$ 20,662	$ (10,054)	$ 19,698	$ 16,053	$ 15,539	$ 14,510	$ 13,267	$ 14,607	$ 46,359	$ 57,923	$ 25,874
Earnings per common share:
Basic (usd per share)	$ 0.22	$ (0.11)	$ 0.21	$ 0.18	$ 0.18	$ 0.18	$ 0.17	$ 0.19	$ 0.49	$ 0.73	$ 0.35
Diluted (usd per share)	$ 0.22	$ (0.11)	$ 0.21	$ 0.18	$ 0.18	$ 0.18	$ 0.17	$ 0.19	$ 0.49	$ 0.72	$ 0.35
Weighted-average number of common shares:
Basic (shares)	95,103	95,103	94,036	88,010	84,059	81,490	76,374	75,504	93,088	79,386	72,647
Diluted (shares)	95,144	95,103	94,036	88,010	84,084	81,490	76,374	75,504	93,098	79,392	72,647