Commitments and Contingencies (Schedule of Lease Commitments) (Details)	Sep. 30, 2020 USD ($)
Maximum Commitment For All Active Development Projects	$ 53,145,000
Development in Process	(46,730,000)
Remaining Unfunded Development Commitment	6,415,000
Development Commitment [Member] | Ignite Medical Resorts [Member]
Maximum Commitment For All Active Development Projects	25,350,000
Development in Process	(24,313,000)
Remaining Unfunded Development Commitment	1,037,000
Development Commitment [Member] | Navion Senior Solutions [Member]
Maximum Commitment For All Active Development Projects	650,000
Development in Process	0
Remaining Unfunded Development Commitment	650,000
Capital Improvement Commitment [Member] | Woodland Village [Member]
Maximum Commitment For All Active Development Projects	7,515,000
Development in Process	(7,425,000)
Remaining Unfunded Development Commitment	90,000
Capital Improvement Commitment [Member] | Senior Living Communities [Member]
Maximum Commitment For All Active Development Projects	9,930,000
Development in Process	(9,763,000)
Remaining Unfunded Development Commitment	167,000
Capital Improvement Commitment [Member] | Wingate Healthcare [Member]
Maximum Commitment For All Active Development Projects	1,900,000
Development in Process	(1,532,000)
Remaining Unfunded Development Commitment	368,000
Capital Improvement Commitment [Member] | Discovery Senior Living [Member]
Maximum Commitment For All Active Development Projects	900,000
Development in Process	(697,000)
Remaining Unfunded Development Commitment	203,000
Capital Improvement Commitment [Member] | 41 Management [Member]
Maximum Commitment For All Active Development Projects	400,000
Development in Process	0
Remaining Unfunded Development Commitment	400,000
Capital Improvement Commitment [Member] | Watermark Retirement [Member]
Maximum Commitment For All Active Development Projects	6,500,000
Development in Process	(3,000,000)
Remaining Unfunded Development Commitment	$ 3,500,000