Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Rental income	$ 45,036	$ 31,577	$ 130,007	$ 114,047
Independent living facilities	634	929	1,874	2,676
Interest and other income	17	808	2,314	2,450
Total revenues	45,687	33,314	134,195	119,173
Expenses:
Depreciation and amortization	13,086	13,420	39,485	38,759
Interest expense	5,519	7,064	18,082	21,209
Property taxes	857	1,025	2,179	2,307
Independent living facilities	568	806	1,660	2,232
Impairment of real estate investments	0	16,692	0	16,692
Provision for loan losses	0	1,076	0	1,076
General and administrative	4,105	3,502	12,921	11,418
Total expenses	24,135	43,585	74,327	93,693
Other income (loss):
Gain (loss) on sale of real estate	0	217	(56)	217
Net income (loss)	$ 21,552	$ (10,054)	$ 59,812	$ 25,697
Earnings Per Share [Abstract]
Basic (in usd per share)	$ 0.23	$ (0.11)	$ 0.63	$ 0.28
Diluted (in usd per share)	$ 0.23	$ (0.11)	$ 0.63	$ 0.28
Weighted-average number of common shares:
Basic (in shares)	95,214	95,103	95,195	92,409
Diluted (in shares)	95,214	95,103	95,195	92,409
Independent living facilities, revenue services	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember
Independent living facilities, cost of services	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember