CONSOLIDATED STATEMENTS OF EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Cumulative effect, period of adoption, adjustment	Cumulative effect, period of adoption, adjusted balance	Common Stock	Common Stock Cumulative effect, period of adoption, adjusted balance	Capital in Excess of Par Value	Capital in Excess of Par Value Cumulative effect, period of adoption, adjusted balance	Treasury Stock	Treasury Stock Cumulative effect, period of adoption, adjusted balance	Cumulative Net Income	Cumulative Net Income Cumulative effect, period of adoption, adjustment	Cumulative Net Income Cumulative effect, period of adoption, adjusted balance	Cumulative Dividends	Cumulative Dividends Cumulative effect, period of adoption, adjusted balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative effect, period of adoption, adjusted balance	Noncontrolling Interests	Noncontrolling Interests Cumulative effect, period of adoption, adjusted balance
Balances at beginning of period at Dec. 31, 2019	$ 16,506,627	$ (5,212)	$ 16,501,415	$ 411,005	$ 411,005	$ 20,190,119	$ 20,190,119	$ (78,955)	$ (78,955)	$ 7,353,966	$ (5,212)	$ 7,348,754	$ (12,223,534)	$ (12,223,534)	$ (112,157)	$ (112,157)	$ 966,183	$ 966,183
Comprehensive income:
Net income (loss)	329,272									310,284							18,988
Other comprehensive income (loss)	(6,011)														15,944		(21,955)
Total comprehensive income	323,261
Net change in noncontrolling interests	7,963					37,625											(29,662)
Amounts related to stock incentive plans, net of forfeitures	(1,166)			246		6,608		(8,020)
Net proceeds from issuance of common stock	590,865			6,975		583,890
Dividends paid:
Common stock dividends	(356,001)												(356,001)
Balances at end of period at Mar. 31, 2020	17,066,337			418,226		20,818,242		(86,975)		7,659,038			(12,579,535)		(96,213)		933,554
Comprehensive income:
Net income (loss)	197,905									179,246							18,659
Other comprehensive income (loss)	(14,345)														(20,643)		6,298
Total comprehensive income	183,560
Net change in noncontrolling interests	(62,825)					7,299											(70,124)
Amounts related to stock incentive plans, net of forfeitures	8,264			28		7,404		832
Net proceeds from issuance of common stock	3,693			89		3,604
Repurchase of common stock	(7,656)							(7,656)
Dividends paid:
Common stock dividends	(254,846)												(254,846)
Balances at end of period at Jun. 30, 2020	16,936,527			418,343		20,836,549		(93,799)		7,838,284			(12,834,381)		(116,856)		888,387
Comprehensive income:
Net income (loss)	393,235									325,585							67,650
Other comprehensive income (loss)	(2,275)														(9,613)		7,338
Total comprehensive income	390,960
Net change in noncontrolling interests	(118,041)					(7,894)											(110,147)
Amounts related to stock incentive plans, net of forfeitures	6,364			18		6,569		(223)
Net proceeds from issuance of common stock	(198)					(198)
Dividends paid:
Common stock dividends	(254,510)												(254,510)
Balances at end of period at Sep. 30, 2020	16,961,102			418,361		20,835,026		(94,022)		8,163,869			(13,088,891)		(126,469)		853,228
Balances at beginning of period at Dec. 31, 2020	16,881,572			418,691		20,823,145		(104,490)		8,327,598			(13,343,721)		(148,504)		908,853
Comprehensive income:
Net income (loss)	71,369									71,546							(177)
Other comprehensive income (loss)	24,097														20,368		3,729
Total comprehensive income	95,466
Net change in noncontrolling interests	(34,516)					(14,250)											(20,266)
Amounts related to stock incentive plans, net of forfeitures	3,539			175		5,393		(2,029)
Net proceeds from issuance of common stock	(92)					(92)
Dividends paid:
Common stock dividends	(254,952)												(254,952)
Balances at end of period at Mar. 31, 2021	16,691,017			418,866		20,814,196		(106,519)		8,399,144			(13,598,673)		(128,136)		892,139
Comprehensive income:
Net income (loss)	45,952									26,257							19,695
Other comprehensive income (loss)	3,107														188		2,919
Total comprehensive income	49,059
Net change in noncontrolling interests	(1,747)					(17,377)											15,630
Amounts related to stock incentive plans, net of forfeitures	2,441			51		4,504		(2,114)
Net proceeds from issuance of common stock	365,531			5,016		360,515
Dividends paid:
Common stock dividends	(255,472)												(255,472)
Balances at end of period at Jun. 30, 2021	16,850,829			423,933		21,161,838		(108,633)		8,425,401			(13,854,145)		(127,948)		930,383
Comprehensive income:
Net income (loss)	190,133									179,663							10,470
Other comprehensive income (loss)	18,575														24,771		(6,196)
Total comprehensive income	208,708
Net change in noncontrolling interests	(18,957)					(4,013)											(14,944)
Amounts related to stock incentive plans, net of forfeitures	5,090			3		4,932		155
Net proceeds from issuance of common stock	998,806			12,704		986,102
Dividends paid:
Common stock dividends	(261,560)												(261,560)
Balances at end of period at Sep. 30, 2021	$ 17,782,916			$ 436,640		$ 22,148,859		$ (108,478)		$ 8,605,064			$ (14,115,705)		$ (103,177)		$ 919,713