Consolidated Statements Of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Rental income		$ 1,374,695	$ 1,443,360	$ 1,588,400
Total revenues		4,742,115	4,605,967	5,121,306
Expenses:
Property operating expenses		2,774,562	2,597,823	2,690,042
Depreciation and amortization		1,037,566	1,038,437	1,027,073
Interest expense		489,853	514,388	555,559
General and administrative expenses		126,727	128,394	126,549
Loss (gain) on derivatives and financial instruments, net		(7,333)	11,049	(4,399)
Loss (gain) on extinguishment of debt, net		49,874	47,049	84,155
Provision for loan losses		7,270	94,436	18,690
Impairment of assets		51,107	135,608	28,133
Other expenses		41,739	70,335	52,612
Total expenses		4,571,365	4,637,519	4,578,414
Income (loss) from continuing operations before income taxes and other items		170,750	(31,552)	542,892
Income tax (expense) benefit		(8,713)	(9,968)	(2,957)
Income (loss) from unconsolidated entities		(22,933)	(8,083)	42,434
Gain (loss) on real estate dispositions, net		235,375	1,088,455	748,041
Income (loss) from continuing operations		374,479	1,038,852	1,330,410
Net income		374,479	1,038,852	1,330,410
Less: Net income (loss) attributable to noncontrolling interests	[1]	38,341	60,008	97,978
Net income (loss) attributable to common stockholders		$ 336,138	$ 978,844	$ 1,232,432
Weighted average number of common shares outstanding:
Basic (in shares)		424,976	415,451	401,845
Diluted (in shares)		426,841	417,387	403,808
Basic:
Income (loss) from continuing operations (in USD per share)		$ 0.88	$ 2.50	$ 3.31
Net income (loss) attributable to common stockholders (in USD per share)		0.79	2.36	3.07
Diluted:
Income (loss) from continuing operations (in USD per share)		0.88	2.49	3.29
Net income (loss) attributable to common stockholders (in USD per share)	[2]	$ 0.78	$ 2.33	$ 3.05
Other comprehensive income (loss):
Unrecognized actuarial gain (loss)		$ 0	$ 0	$ 540
Foreign currency translation gain (loss)		(52,826)	103,612	161,915
Derivative and financial instruments designated as hedges gain (loss)		79,702	(134,369)	(131,120)
Total other comprehensive income (loss)		26,876	(30,757)	31,335
Total comprehensive income (loss)		401,355	1,008,095	1,361,745
Less: Total comprehensive income (loss) attributable to noncontrolling interests	[3]	38,029	65,598	111,701
Total comprehensive income (loss) attributable to common stockholders		363,326	942,497	1,250,044
Resident fees and services
Revenues:
Revenue from contract with customer		3,197,223	3,074,022	3,448,175
Interest income
Revenues:
Revenue from contract with customer		137,563	69,156	63,830
Other income
Revenues:
Revenue from contract with customer		$ 32,634	$ 19,429	$ 20,901

[1] Includes amounts attributable to redeemable noncontrolling interests

[2] Includes adjustment to the numerator for income (loss) attributable to OP unitholders

[3] Includes amounts attributable to redeemable noncontrolling interests.