Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Rental income	$ 173,612	$ 155,667
Rental income			$ 140,073
Tenant reimbursements			11,924
Independent living facilities	2,077	3,389	3,379
Interest and other income	2,643	4,345	1,565
Total revenues	178,332	163,401	156,941
Expenses:
Depreciation and amortization	52,760	51,822	45,766
Interest expense	23,661	28,125	27,860
Property taxes	2,836	3,048	11,924
Independent living facilities	1,869	2,898	2,964
Impairment of real estate investments	0	16,692	0
Provision for loan losses	0	1,076	0
General and administrative	16,302	15,158	12,555
Total expenses	97,428	118,819	101,069
Other (loss) income:
(Loss) gain on sale of real estate	(37)	1,777	2,051
Net income	$ 80,867	$ 46,359	$ 57,923
Earnings per common share:
Basic (usd per share)	$ 0.85	$ 0.49	$ 0.73
Diluted (usd per share)	$ 0.85	$ 0.49	$ 0.72
Weighted-average number of common shares:
Basic (shares)	95,200	93,088	79,386
Diluted (shares)	95,207	93,098	79,392
Independent living facilities, revenue services	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember
Independent living facilities, cost of services	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember