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Sale of stock settlement value of shares.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Settlement date of the forward contract indexed to issuer's equity, in YYYY-MM-DD format.

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The number of limited partner units outstanding.

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The number of units converted into shares of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Per share or per unit amount of equity securities issued.

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Stockholder Equity and Noncontrolling Interest - Additional Information (Detail)							3 Months Ended		6 Months Ended	12 Months Ended
	Dec. 14, 2021 USD ($) shares	Nov. 01, 2021 shares	Jul. 27, 2021 $ / shares shares	Jun. 29, 2021 USD ($) shares	Dec. 27, 2020 USD ($) shares	Feb. 20, 2020 Agreement $ / shares shares	Dec. 31, 2020 $ / shares shares	Mar. 31, 2020 USD ($) shares	Jun. 30, 2021 shares	Dec. 31, 2021 USD ($) Agreement $ / shares shares	Dec. 31, 2020 $ / shares shares	Dec. 31, 2019 shares	Dec. 16, 2021 $ / shares	Jul. 26, 2021 shares	Nov. 13, 2020 USD ($)	May 31, 2016 shares
Class Of Stock [Line Items]
At-the-market agreement to sell common shares, maximum offer price \| $															$ 150,000,000
Common stock, par value \| $ / shares			$ 0.01				$ 0.01			$ 0.01	$ 0.01		$ 0.01
Common stock, shares authorized			500,000,000				500,000,000			500,000,000	500,000,000			300,000,000		4,300,000
Preferred stock, par value \| $ / shares			$ 0.01				$ 0.01			$ 0.01	$ 0.01
Preferred stock, shares authorized			50,000,000				50,000,000			50,000,000	50,000,000
Number of IROP unites exchanged										122,154	196,974
OP Units outstanding							674,517			6,981,841	674,517
Common Shares
Class Of Stock [Line Items]
Common stock issued										118,659,635	10,350,000	1,717,291
Conversion of noncontrolling interest to common shares (in Shares)										122,154	196,974	9,616
Steadfast Apartment REIT, Inc.
Class Of Stock [Line Items]
Stock issued in connection with merger										6,429,481
Forward Sale Agreement
Class Of Stock [Line Items]
Common stock issued										16,100,000
Number of agreements \| Agreement										2
Number of shares issued	16,100,000
Net proceeds \| $	$ 271,820,000
ATM Program
Class Of Stock [Line Items]
Expected settlement date of forward sales transaction		Dec. 15, 2022
ATM Program \| Forward Contracts
Class Of Stock [Line Items]
Share price \| $ / shares										$ 23.78
Number of shares issued		1,000,000		2,932,000			2,932,000		2,932,000
Net proceeds \| $				$ 41,671,000						$ 23,780,000
2020 Forward Sale Agreement
Class Of Stock [Line Items]
Common stock issued						10,350,000
Number of agreements \| Agreement						2
Number of shares issued								3,406,000
Settlement value of shares \| $					$ 98,775,000			$ 50,000
Settlement of remaining shares					6,944,000
Underwriting Agreement \| BMO Capital Markets and Bank of Montreal
Class Of Stock [Line Items]
Common stock issued			16,100,000
Share price \| $ / shares			$ 17.04
Underwriters’ option to purchase additional shares			2,100,000
2020 Underwriting Agreement \| BMO Capital Markets and Bank of Montreal
Class Of Stock [Line Items]
Common stock issued						10,350,000
Share price \| $ / shares						$ 14.688
Underwriters’ option to purchase additional shares						1,350,000