Commitments, Contingencies and Uncertainties (Schedule of Development Commitments) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Apr. 30, 2022
Net Investment Income [Line Items]
Total	$ 33,495
Funded	(25,676)
Remaining	7,819
Encore Senior Living
Net Investment Income [Line Items]
Cash consideration of an ongoing property tax appeal		$ 800
Woodland Village | Capital Improvement Commitment
Net Investment Income [Line Items]
Total	7,515
Funded	(7,425)
Remaining	90
Senior Living Communities | Capital Improvement Commitment
Net Investment Income [Line Items]
Total	9,930
Funded	(9,930)
Remaining	0
Watermark Retirement | Capital Improvement Commitment
Net Investment Income [Line Items]
Total	6,500
Funded	(5,959)
Remaining	541
Navion Senior Solutions | Capital Improvement Commitment
Net Investment Income [Line Items]
Total	3,500
Funded	(1,062)
Remaining	2,438
Other | Development Commitment
Net Investment Income [Line Items]
Total	4,550
Funded	(1,300)
Remaining	3,250
SHOP | Development Commitment
Net Investment Income [Line Items]
Total	1,500
Funded	0
Remaining	1,500
Discovery PropCo | Capital Addition Purchase Commitments
Net Investment Income [Line Items]
Total	2,000
Funded	$ (1,000)