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Summary of Significant Accounting Policies - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) Property ApartmentUnit $ / shares | Dec. 31, 2020 USD ($) $ / shares | Dec. 31, 2019 USD ($) $ / shares
Lease intangibles, average term | 6 months |  |
Capitalized costs development and renovation | $ 13,900,000 | $ 12,100,000 |
Lessee, finance lease, description | The Company is a lessor for its residential and non-residential leases and is a lessee for its corporate headquarters and regional offices and ground leases for land underlying current operating properties or projects under development. If applicable, lease agreements must be evaluated to determine the accounting treatment as a finance or operating lease in accordance with the lease standard. A lease is classified as a finance lease if it meets any of the following criteria: (a) Ownership of the underlying asset is transferred to the lessee by the end of the lease term; (b) the lessee has and is reasonably certain to exercise an option to purchase the underlying asset; (c) the lease term is for the major part of the remaining economic life of the underlying asset; (d) the present value of future minimum lease payments is equal to substantially all of the fair value of the underlying asset; and (e) the underlying asset is expected to have no alternative use to the lessor at the end of the lease term due to its specialized nature. |  |
Lessee, finance lease residual value guarantee, description | the present value of future minimum lease payments is equal to substantially all of the fair value of the underlying asset |  |
Common Stock, Par or Stated Value Per Share | $ / shares | $ 0.01 | $ 0.01 | $ 0.01
Provision for income tax | $ 915,000 | $ 852,000 | $ (2,281,000)
Remaining AMT refund received |  | 1,600,000 |
Land and depreciable property net | $ 13,200,000,000 | 13,800,000,000 |
Alternative minimum tax preference adjustment per share | $ / shares | $ 0.06 |  |
Alternative minimum tax preference adjustment disclosed under treasury regulation year one per share | $ / shares | 0.02650 |  |
Alternative minimum tax preference adjustment disclosed under treasury regulation year three per share | $ / shares | $ 0.00584 |  |
Properties | Property | 310 |  |
Noncontrolling Interests – Partially Owned Properties | $ 18,166,000 | $ 4,673,000 |
Apartment units | ApartmentUnit | 80,407 |  |
Partially Owned Properties – Consolidated |  |  |
Properties | Property | 16 |  |
Noncontrolling Interests – Partially Owned Properties | $ 18,200,000 |  |
Apartment units | ApartmentUnit | 3,546 |  |
Limited Life Partnership Properties [Member] |  |  |
Properties | Property | 2 |  |
Noncontrolling Interests – Partially Owned Properties | $ (4,800,000) |  |
Noncontrolling interests settlement value | 70,800,000 |  |
Federal [Member] |  |  |
Provision for income tax | $ 0 |  |
Minimum [Member] | Retail Commercial Leases [Member] |  |  |
Retail leases term | 5 years |  |
Maximum [Member] | Retail Commercial Leases [Member] |  |  |
Retail leases term | 10 years |  |
Furniture and Fixtures [Member] | Minimum [Member] |  |  |
Property, plant and equipment, estimated useful lives | 5 years |  |
Furniture and Fixtures [Member] | Maximum [Member] |  |  |
Property, plant and equipment, estimated useful lives | 10 years |  |
Building [Member] |  |  |
Property, plant and equipment, estimated useful lives | 30 years |  |
Replacements [Member] | Minimum [Member] |  |  |
Property, plant and equipment, estimated useful lives | 5 years |  |
Replacements [Member] | Maximum [Member] |  |  |
Property, plant and equipment, estimated useful lives | 10 years |  |
Renovations and Improvements Minimum [Member] | Minimum [Member] |  |  |
Property, plant and equipment, estimated useful lives | 5 years |  |
Renovations and Improvements Minimum [Member] | Maximum [Member] |  |  |
Property, plant and equipment, estimated useful lives | 15 years |  |
Corporate Office Leases [Member] | Maximum [Member] |  |  |
Remaining lease terms | 10 years |  |
Ground Leases [Member] |  |  |
Unsecured borrowing rates for actual pricing period used for calculating discount rate | 30 years |  |

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