Equity - Additional Information (Detail) $ / shares in Units, $ in Thousands		3 Months Ended						9 Months Ended
	Sep. 15, 2023 USD ($) $ / shares	Sep. 30, 2023 USD ($) shares	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2023 USD ($) agreement shares	Sep. 30, 2022 USD ($) shares	Dec. 31, 2022 USD ($) shares	Mar. 25, 2014 shares
Class of Stock [Line Items]
Shares authorized (in shares) | shares		500,000,000						500,000,000
Common stock, shares authorized (in shares) | shares		400,000,000						400,000,000		400,000,000
Preferred stock, shares authorized (in shares) | shares		100,000,000						100,000,000
Preferred stock, shares issued (in shares) | shares		0						0		0
Preferred stock, shares outstanding (in shares) | shares		0						0		0
Common stock, shares issued under dividend reinvestment program (in shares) | shares								5,079	5,420
Dividends paid per common stock (in dollars per share) | $ / shares	$ 0.62
Total dividends declared	$ 106,800	$ 107,033	$ 107,028	$ 107,072	$ 106,197	$ 105,812	$ 105,801	$ 321,133	$ 317,812
Accumulated other comprehensive income		10,606						10,606		$ 10,022
Net realized and unrealized gains related to changes in fair value of derivative instruments		281,800						281,800		259,800
Cumulative unrealized currency translation adjustment on assets and liabilities denominated in foreign currencies		271,200						271,200		249,800
Joint Venture | Multifamily
Class of Stock [Line Items]
Total equity		151,000						151,000		169,400
Equity interests owned		128,300						128,300		144,000
Non-controlling interests		$ 22,700						$ 22,700		$ 25,400
Dividend Reinvestment and Direct Stock Purchase Plan
Class of Stock [Line Items]
Common shares reserved for issuance (in shares) | shares		9,976,469						9,976,469			10,000,000
ATM Agreement
Class of Stock [Line Items]
Number of equity distribution agreements | agreement								7
Aggregate sales price								$ 699,100
Number of shares sold (in shares) | shares								0	2,303,469
Shares sold									$ 70,700
Aggregate sales price remaining available		$ 480,900						$ 480,900
Class A Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares) | shares		400,000,000						400,000,000