Condensed Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues:
Rental income	$ 47,744	$ 42,507	$ 92,990	$ 84,971
Independent living facilities	$ 0	$ 615	$ 0	$ 1,240
Independent living facilities, revenue services	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember
Interest and other income	$ 514	$ 1,046	$ 1,019	$ 2,297
Total revenues	48,258	44,168	94,009	88,508
Expenses:
Depreciation and amortization	13,843	13,239	27,316	26,399
Interest expense	6,534	5,849	12,296	12,563
Property taxes	766	837	1,462	1,322
Independent living facilities	$ 0	$ 546	$ 0	$ 1,092
Independent living facilities, cost of services	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember	us-gaap:HealthCareResidentServiceMember
General and administrative	$ 5,798	$ 4,762	$ 10,940	$ 8,816
Total expenses	26,941	25,233	52,014	50,192
Other loss:
Loss on sale of real estate	0	0	(192)	(56)
Net income	$ 21,317	$ 18,935	$ 41,803	$ 38,260
Earnings per common share:
Basic (in usd per share)	$ 0.22	$ 0.20	$ 0.43	$ 0.40
Diluted (in usd per share)	$ 0.22	$ 0.20	$ 0.43	$ 0.40
Weighted-average number of common shares:
Basic (in shares)	96,082	95,208	95,732	95,185
Diluted (in shares)	96,120	95,208	95,755	95,185