Organization (Details)	Dec. 31, 2021 ft² a property apartment
Unconsolidated joint venture
Real Estate Properties [Line Items]
Number of units in real estate property | apartment	10,281
Commercial properties
Real Estate Properties [Line Items]
Number of real estate properties	5
Area | ft²	1,063,515
Commercial properties | Regis Realty Prime, LLC
Real Estate Properties [Line Items]
Number of real estate properties	4
Office building
Real Estate Properties [Line Items]
Number of real estate properties	4
Retail site
Real Estate Properties [Line Items]
Number of real estate properties	1
Apartment building
Real Estate Properties [Line Items]
Number of real estate properties	9
Number of units in real estate property | apartment	1,492
Apartment building | Unconsolidated joint venture
Real Estate Properties [Line Items]
Number of real estate properties	52
Developed and undeveloped land
Real Estate Properties [Line Items]
Area of land | a	1,875
Transcontinental Realty Investors, Inc. | ARL
Real Estate Properties [Line Items]
Ownership interest	78.00%
Transcontinental Realty Investors, Inc. | Parent of ARL
Real Estate Properties [Line Items]
Ownership interest	7.00%