Segment Reporting (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Rental income	$ 217,700	$ 271,049	$ 307,208
Resident fees and services	35,796	0	0
Interest income and other	24,698
Total revenues	278,194	298,715	332,811
Senior housing operating expenses	28,193	0	0
Taxes and insurance on leased properties	9,788
NOI	240,213
Depreciation	70,880	80,798	83,150
Interest	44,917	50,810	52,882
Legal	2,555
Franchise, excise and other taxes	844	788	534
General and administrative	22,768	18,431	13,304
Loan and realty losses	61,911	52,766	991
Gains on sales of real estate, net	(28,342)	(32,498)	(21,316)
Loss on operations transfer, net	710	0	0
Gain on note receivable payoff	(1,113)	0	0
Loss on early retirement of debt	151	1,912	3,924
Gains from equity method investment	(569)	1,545	3,126
Net income	65,501	111,967	$ 185,311
Total assets	2,507,424	$ 2,838,876
Operating Segments | Real Estate Investments
Segment Reporting Information [Line Items]
Rental income	217,700
Resident fees and services	0
Interest income and other	24,383
Total revenues	242,083
Senior housing operating expenses	0
Taxes and insurance on leased properties	9,788
NOI	232,295
Depreciation	64,407
Interest	3,089
Legal	0
Franchise, excise and other taxes	0
General and administrative	0
Loan and realty losses	61,911
Gains on sales of real estate, net	(28,342)
Loss on operations transfer, net	710
Gain on note receivable payoff	(1,113)
Loss on early retirement of debt	0
Gains from equity method investment	(569)
Net income	132,202
Total assets	2,225,176
Operating Segments | SHOP
Segment Reporting Information [Line Items]
Rental income	0
Resident fees and services	35,796
Interest income and other	0
Total revenues	35,796
Senior housing operating expenses	28,193
Taxes and insurance on leased properties	0
NOI	7,603
Depreciation	6,408
Interest	0
Legal	0
Franchise, excise and other taxes	0
General and administrative	0
Loan and realty losses	0
Gains on sales of real estate, net	0
Loss on operations transfer, net	0
Gain on note receivable payoff	0
Loss on early retirement of debt	0
Gains from equity method investment	0
Net income	1,195
Total assets	274,135
Non-segment/Corporate
Segment Reporting Information [Line Items]
Rental income	0
Resident fees and services	0
Interest income and other	315
Total revenues	315
Senior housing operating expenses	0
Taxes and insurance on leased properties	0
NOI	315
Depreciation	65
Interest	41,828
Legal	2,555
Franchise, excise and other taxes	844
General and administrative	22,768
Loan and realty losses	0
Gains on sales of real estate, net	0
Loss on operations transfer, net	0
Gain on note receivable payoff	0
Loss on early retirement of debt	151
Gains from equity method investment	0
Net income	(67,896)
Total assets	$ 8,113