Condensed Consolidated Statements of Equity - USD ($) $ in Thousands		Total	Cumulative Effect, Period of Adoption, Adjustment		Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment		Total Parent Equity	Total Parent Equity Cumulative Effect, Period of Adoption, Adjustment		Non-controlling Interests in Subsidiaries
Beginning balance (in shares) at Dec. 31, 2018					145,936,613
Beginning balance at Dec. 31, 2018		$ 3,471,991			$ 145,937	$ 78,380	$ (1,115,078)		$ 4,341,212			$ 3,450,451			$ 21,540
Beginning balance (Accounting Standards Update 2018-02) at Dec. 31, 2018	[1]		$ 0					$ (122,526)		$ 122,526
Beginning balance (Accounting Standards Update 2016-02) at Dec. 31, 2018	[1]		4,797							4,797			$ 4,797
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income		384,680							384,680			384,680
Other comprehensive loss, net of tax		42,425					42,425					42,425
Cash dividends declared		(222,735)							(222,735)			(222,735)
Share-based awards exercised, including tax benefit (in shares)					141,756
Share-based awards exercised, including tax benefit		(7,371)			$ 141	(7,512)						(7,371)
Share-based compensation		13,081				13,081						13,081
Noncontrolling interest activities		1,107													1,107
Ending balance (in shares) at Jun. 30, 2019					146,078,369
Ending balance at Jun. 30, 2019		3,687,975			$ 146,078	83,949	(1,195,179)		4,630,480			3,665,328			22,647
Beginning balance (in shares) at Dec. 31, 2018					145,936,613
Beginning balance at Dec. 31, 2018		3,471,991			$ 145,937	78,380	(1,115,078)		4,341,212			3,450,451			21,540
Beginning balance (Accounting Standards Update 2018-02) at Dec. 31, 2018	[1]		0					$ (122,526)		122,526
Beginning balance (Accounting Standards Update 2016-02) at Dec. 31, 2018	[1]		4,797							4,797			4,797
Ending balance (in shares) at Dec. 31, 2019					145,378,158
Ending balance at Dec. 31, 2019		$ 3,695,500	(11,432)	[2]	$ 145,378	98,777	(1,141,308)		4,571,860	(11,432)	[2]	3,674,707	(11,432)	[2]	20,793
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member
Beginning balance (in shares) at Mar. 31, 2019					146,063,911
Beginning balance at Mar. 31, 2019		$ 3,572,832			$ 146,064	77,424	(1,189,987)		4,517,430			3,550,931			21,901
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income		224,430							224,430			224,430
Other comprehensive loss, net of tax		(5,192)					(5,192)					(5,192)
Cash dividends declared		(111,380)							(111,380)			(111,380)
Share-based awards exercised, including tax benefit (in shares)					14,458
Share-based awards exercised, including tax benefit		(532)			$ 14	(546)						(532)
Share-based compensation		7,071				7,071						7,071
Noncontrolling interest activities		746													746
Ending balance (in shares) at Jun. 30, 2019					146,078,369
Ending balance at Jun. 30, 2019		3,687,975			$ 146,078	83,949	(1,195,179)		4,630,480			3,665,328			22,647
Beginning balance (in shares) at Dec. 31, 2019					145,378,158
Beginning balance at Dec. 31, 2019		3,695,500	$ (11,432)	[2]	$ 145,378	98,777	(1,141,308)		4,571,860	$ (11,432)	[2]	3,674,707	$ (11,432)	[2]	20,793
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income		(427,837)							(427,837)			(427,837)
Other comprehensive loss, net of tax		(71,064)					(71,064)					(71,064)
Cash dividends declared		(228,444)							(228,444)			(228,444)
Share-based awards exercised, including tax benefit (in shares)					22,475
Share-based awards exercised, including tax benefit		(790)			$ 22	(812)						(790)
Share-based compensation		9,854				9,854						9,854
Purchase of stock (in shares)					(1,136,444)
Purchase of stock		(95,719)			$ (1,136)				(94,583)			(95,719)
Noncontrolling interest activities		820													820
Ending balance (in shares) at Jun. 30, 2020					144,264,189
Ending balance at Jun. 30, 2020		2,870,888			$ 144,264	107,819	(1,212,372)		3,809,564			2,849,275			21,613
Beginning balance (in shares) at Mar. 31, 2020					144,249,343
Beginning balance at Mar. 31, 2020		3,423,031			$ 144,249	103,878	(1,333,329)		4,487,904			3,402,702			20,329
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income		(564,372)							(564,372)			(564,372)
Other comprehensive loss, net of tax		120,957					120,957					120,957
Cash dividends declared		(113,968)							(113,968)			(113,968)
Share-based awards exercised, including tax benefit (in shares)					14,846
Share-based awards exercised, including tax benefit		(449)			$ 15	(464)						(449)
Share-based compensation		4,405				4,405						4,405
Noncontrolling interest activities		1,284													1,284
Ending balance (in shares) at Jun. 30, 2020					144,264,189
Ending balance at Jun. 30, 2020		$ 2,870,888			$ 144,264	$ 107,819	$ (1,212,372)		$ 3,809,564			$ 2,849,275			$ 21,613

[1]

[2] The Company adopted Accounting Standards Update (“ASU”) 2016-13, Measurement of Credit Losses on Financial Instruments, during the first quarter of 2020. Refer to the recent accounting pronouncements footnote. (2)The Company adopted ASU 2016-02, Leases, and ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, during the first quarter of 2019.