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
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