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 income (loss)		612,167							612,167			612,167
Other comprehensive loss, net of tax		(30,976)					(30,976)					(30,976)
Cash dividends declared		(333,521)							(333,521)			(333,521)
Share-based awards exercised, including tax benefit (in shares)					144,709
Share-based awards exercised, including tax benefit		(7,495)			$ 145	(7,640)						(7,495)
Share-based compensation		19,820				19,820						19,820
Purchase of stock (in shares)					(788,207)
Purchase of stock		(73,052)			$ (789)				(72,263)			(73,052)
Noncontrolling interest activities		1,006													1,006
Ending balance (in shares) at Sep. 30, 2019					145,293,115
Ending balance at Sep. 30, 2019		3,664,737			$ 145,293	90,560	(1,268,580)		4,674,918			3,642,191			22,546
Beginning balance (in shares) at Jun. 30, 2019					146,078,369
Beginning balance at Jun. 30, 2019		3,687,975			$ 146,078	83,949	(1,195,179)		4,630,480			3,665,328			22,647
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		227,487							227,487			227,487
Other comprehensive loss, net of tax		(73,401)					(73,401)					(73,401)
Cash dividends declared		(110,786)							(110,786)			(110,786)
Share-based awards exercised, including tax benefit (in shares)					2,953
Share-based awards exercised, including tax benefit		(124)			$ 4	(128)						(124)
Share-based compensation		6,739				6,739						6,739
Purchase of stock (in shares)					(788,207)
Purchase of stock		(73,052)			$ (789)				(72,263)			(73,052)
Noncontrolling interest activities		(101)													(101)
Ending balance (in shares) at Sep. 30, 2019					145,293,115
Ending balance at Sep. 30, 2019		3,664,737			$ 145,293	90,560	(1,268,580)		4,674,918			3,642,191			22,546
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 income (loss)		(200,306)							(200,306)			(200,306)
Other comprehensive loss, net of tax		(25,264)					(25,264)					(25,264)
Cash dividends declared		(342,426)							(342,426)			(342,426)
Share-based awards exercised, including tax benefit (in shares)					47,939
Share-based awards exercised, including tax benefit		(1,754)			$ 48	(1,802)						(1,754)
Share-based compensation		16,274				16,274						16,274
Purchase of stock (in shares)					(1,136,444)
Purchase of stock		(95,719)			$ (1,136)				(94,583)			(95,719)
Noncontrolling interest activities		(100)													(100)
Ending balance (in shares) at Sep. 30, 2020					144,289,653
Ending balance at Sep. 30, 2020		$ 3,034,773			$ 144,290	113,249	(1,166,572)		3,923,113			3,014,080			20,693
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member
Beginning balance (in shares) at Jun. 30, 2020					144,264,189
Beginning balance at Jun. 30, 2020		$ 2,870,888			$ 144,264	107,819	(1,212,372)		3,809,564			2,849,275			21,613
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		227,531							227,531			227,531
Other comprehensive loss, net of tax		45,800					45,800					45,800
Cash dividends declared		(113,982)							(113,982)			(113,982)
Share-based awards exercised, including tax benefit (in shares)					25,464
Share-based awards exercised, including tax benefit		(964)			$ 26	(990)						(964)
Share-based compensation		6,420				6,420						6,420
Noncontrolling interest activities		(920)													(920)
Ending balance (in shares) at Sep. 30, 2020					144,289,653
Ending balance at Sep. 30, 2020		$ 3,034,773			$ 144,290	$ 113,249	$ (1,166,572)		$ 3,923,113			$ 3,014,080			$ 20,693

[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.