Segment Reporting (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Rental income	$ 60,952	$ 39,982	$ 126,250	$ 104,541
Resident fees and services	11,793	11,992	23,493	11,992
Interest income and other	5,131	7,925	10,521	14,694
Total revenues	77,876	59,899	160,264	131,227
Senior housing operating expenses	9,682	9,113	19,481	9,113
Taxes and insurance on leased properties	3,212	2,157	5,830	5,195
NOI	64,982	48,629	134,953	116,919
Depreciation	17,730	17,772	35,347	36,044
Interest	14,194	10,862	28,221	21,060
Legal	174	339	297	2,166
Franchise, excise and other taxes	258	225	441	469
General and administrative	4,306	5,049	9,959	13,150
Loan and realty losses (gains)	186	4,094	(232)	28,622
Gains on sales of real estate, net	(11,366)	(10,521)	(12,763)	(13,502)
Gain (loss) on operations transfer, net	(20)	729	(20)	729
Gain on note receivable payoff	0	(1,113)	0	(1,113)
Loss on early retirement of debt	73	0	73	151
Gains from equity method investment	0	(273)	0	(569)
Net income	39,447	21,466	73,630	29,712
Total assets	2,498,495	2,587,291	2,498,495	2,587,291	$ 2,507,424
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
Rental income	60,952	39,982	126,250	104,541
Resident fees and services	0	0	0	0
Interest income and other	5,083	7,825	10,391	14,542
Total revenues	66,035	47,807	136,641	119,083
Senior housing operating expenses	0	0	0	0
Taxes and insurance on leased properties	3,212	2,157	5,830	5,195
NOI	62,823	45,650	130,811	113,888
Depreciation	15,477	15,638	30,854	33,892
Interest	766	771	1,525	1,534
Legal	0	0	0	0
Franchise, excise and other taxes	0	0	0	0
General and administrative	0	0	0	0
Loan and realty losses (gains)	186	4,094	(232)	28,622
Gains on sales of real estate, net	(11,366)	(10,521)	(12,763)	(13,502)
Gain (loss) on operations transfer, net	(20)	729	(20)	729
Gain on note receivable payoff		(1,113)		(1,113)
Loss on early retirement of debt	0		0	0
Gains from equity method investment		(273)		(569)
Net income	57,780	36,325	111,447	64,295
Total assets	2,217,124	2,277,599	2,217,124	2,277,599
Operating Segments | SHOP
Segment Reporting Information [Line Items]
Rental income	0	0	0	0
Resident fees and services	11,793	11,992	23,493	11,992
Interest income and other	0	0	0	0
Total revenues	11,793	11,992	23,493	11,992
Senior housing operating expenses	9,682	9,113	19,481	9,113
Taxes and insurance on leased properties	0	0	0	0
NOI	2,111	2,879	4,012	2,879
Depreciation	2,239	2,116	4,466	2,116
Interest	0	0	0	0
Legal	0	0	0	0
Franchise, excise and other taxes	0	0	0	0
General and administrative	0	0	0	0
Loan and realty losses (gains)	0	0	0	0
Gains on sales of real estate, net	0	0	0	0
Gain (loss) on operations transfer, net	0	0	0	0
Gain on note receivable payoff		0		0
Loss on early retirement of debt	0		0	0
Gains from equity method investment		0		0
Net income	(128)	763	(454)	763
Total assets	271,359	277,155	271,359	277,155
Non-segment/Corporate
Segment Reporting Information [Line Items]
Rental income	0	0	0	0
Resident fees and services	0	0	0	0
Interest income and other	48	100	130	152
Total revenues	48	100	130	152
Senior housing operating expenses	0	0	0	0
Taxes and insurance on leased properties	0	0	0	0
NOI	48	100	130	152
Depreciation	14	18	27	36
Interest	13,428	10,091	26,696	19,526
Legal	174	339	297	2,166
Franchise, excise and other taxes	258	225	441	469
General and administrative	4,306	5,049	9,959	13,150
Loan and realty losses (gains)	0	0	0	0
Gains on sales of real estate, net	0	0	0	0
Gain (loss) on operations transfer, net	0	0	0	0
Gain on note receivable payoff		0		0
Loss on early retirement of debt	73		73	151
Gains from equity method investment		0		0
Net income	(18,205)	(15,622)	(37,363)	(35,346)
Total assets	$ 10,012	$ 32,537	$ 10,012	$ 32,537