Summary of Significant Accounting Policies (Details Textual) $ in Thousands			12 Months Ended
	Nov. 30, 2020	Feb. 03, 2019	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Weighted average ownership interest			5.07%	5.20%	5.31%
Provision for real estate impairment loss			$ 47,281	$ 0	$ 0
Option to acquire equity interest in partnership, percentage			30.00%
Interest costs capitalized			$ 13,700	11,600	7,300
Other direct and indirect costs capitalized			33,000	36,400	$ 35,900
Acquisition of property			51,000
Purchase price allocation			81,000
Goodwill			32,286	32,286
Subordinated debt			$ 215,400
Estimated useful life			15 years
Percentage of income tax on income from non-arms length transactions			100.00%
Equity reverse stock split	0.0123821	0.0103119
Minimum [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life			5 years
Estimated useful life of software			3 years
Maximum [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life			30 years
Estimated useful life of software			5 years
Furniture, Fixtures and Equipment [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life			5 years
Equipment [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life			5 years
AIMCO [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Goodwill			$ 5,500	$ 5,500
Note Receivable issue from Aimco			$ 534,000
Note maturity date			Jan. 31, 2024
Note interest rate			5.20%
Note frequency of periodic payment			quarterly