Earnings per Share and per Unit (Details Textual) shares in Millions	Dec. 31, 2020 shares
Earnings Per Share [Abstract]
Number of shares potentially redeemable for (in shares)	2.1

Number of Shares of Common Stock Required to Redeem Preferred OP Units Tendered for Redemption, if Parent Chooses to Redeem in Shares Rather than Cash

No definition available.

Name:	airc_NumberOfSharesOfCommonStockRequiredToRedeemPreferredOPUnitsTenderedForRedemptionIfParentChoosesToRedeemInSharesRatherThanCash
Namespace Prefix:	airc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant