Investment in Unconsolidated Real Estate Partnerships - Schedule of Combined Balance Sheets for Joint Venture Partners (Details) $ in Thousands	6 Months Ended
Jun. 30, 2026 USD ($) apartment	Dec. 31, 2025 USD ($) investment
Variable Interest Entity [Line Items]
AIR Operating Partnership's investment in balance	$ 305,570	$ 314,297
Number of unconsolidated investments \| investment		2
Virginia JV
Variable Interest Entity [Line Items]
Repayments of debt	$ (248,800)
Virginia JV \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Variable Interest Entity [Line Items]
Number of apartment communities sold \| apartment	2
Variable Interest Entity, Primary Beneficiary \| Virginia JV
Variable Interest Entity [Line Items]
Third-party debt	$ 146,228	$ 395,000
AIR Operating Partnership's investment in balance	7,701	8,877
Variable Interest Entity, Primary Beneficiary \| Value-Add JV
Variable Interest Entity [Line Items]
Third-party debt	87,506	87,988
AIR Operating Partnership's investment in balance	28,483	28,767
Variable Interest Entity, Primary Beneficiary \| Core JV
Variable Interest Entity [Line Items]
Third-party debt	890,832	890,925
AIR Operating Partnership's investment in balance	249,388	255,465
Variable Interest Entity, Not Primary Beneficiary \| Immaterial Unconsolidated Investments
Variable Interest Entity [Line Items]
AIR Operating Partnership's investment in balance	$ 20,000	$ 21,200

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Number of Unconsolidated Investments

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Amount of cash outflow for short-term and long-term debt. Excludes payment of lease obligation.

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