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	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, 2019				145,378,158
Beginning balance at Dec. 31, 2019	$ 3,695,500	$ (11,432)	[1]	$ 145,378	$ 98,777	$ (1,141,308)	$ 4,571,860	$ (11,432)	[1]	$ 3,674,707	$ (11,432)	[1]	$ 20,793
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(427,837)						(427,837)			(427,837)
Other comprehensive income, net of tax	(71,064)					(71,064)				(71,064)
Cash dividends declared	(228,444)						(228,444)			(228,444)
Share-based awards exercised in shares)				22,475
Share-based awards exercised	(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 Dec. 31, 2019				145,378,158
Beginning balance at Dec. 31, 2019	3,695,500	(11,432)	[1]	$ 145,378	98,777	(1,141,308)	4,571,860	(11,432)	[1]	3,674,707	(11,432)	[1]	20,793
Ending balance (in shares) at Dec. 31, 2020				144,354,335
Ending balance at Dec. 31, 2020	$ 3,218,003	6,223	[2]	$ 144,354	117,165	(1,036,502)	3,979,779	6,223	[2]	3,204,796	6,223	[2]	13,207
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201902Member
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 income (loss)	(564,372)						(564,372)			(564,372)
Other comprehensive income, net of tax	120,957					120,957				120,957
Cash dividends declared	(113,968)						(113,968)			(113,968)
Share-based awards exercised in shares)				14,846
Share-based awards exercised	(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
Beginning balance (in shares) at Dec. 31, 2020				144,354,335
Beginning balance at Dec. 31, 2020	3,218,003	$ 6,223	[2]	$ 144,354	117,165	(1,036,502)	3,979,779	$ 6,223	[2]	3,204,796	$ 6,223	[2]	13,207
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	414,206						414,206			414,206
Other comprehensive income, net of tax	32,948					32,948				32,948
Cash dividends declared	(235,120)						(235,120)			(235,120)
Share-based awards exercised in shares)				383,163
Share-based awards exercised	(19,330)			$ 384	(19,714)					(19,330)
Share-based compensation	14,521				14,521					14,521
Purchase of stock (in shares)				(1,435,825)
Purchase of stock	(184,365)			$ (1,436)			(182,929)			(184,365)
Noncontrolling interest activities	(1,941)												(1,941)
Ending balance (in shares) at Jun. 30, 2021				143,301,673
Ending balance at Jun. 30, 2021	3,245,145			$ 143,302	111,972	(1,003,554)	3,982,159			3,233,879			11,266
Beginning balance (in shares) at Mar. 31, 2021				144,458,057
Beginning balance at Mar. 31, 2021	3,336,109			$ 144,458	117,867	(1,023,760)	4,085,998			3,324,563			11,546
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	196,496						196,496			196,496
Other comprehensive income, net of tax	20,206					20,206				20,206
Cash dividends declared	(117,406)						(117,406)			(117,406)
Share-based awards exercised in shares)				279,441
Share-based awards exercised	(13,901)			$ 280	(14,181)					(13,901)
Share-based compensation	8,286				8,286					8,286
Purchase of stock (in shares)				(1,435,825)
Purchase of stock	(184,365)			$ (1,436)			(182,929)			(184,365)
Noncontrolling interest activities	(280)												(280)
Ending balance (in shares) at Jun. 30, 2021				143,301,673
Ending balance at Jun. 30, 2021	$ 3,245,145			$ 143,302	$ 111,972	$ (1,003,554)	$ 3,982,159			$ 3,233,879			$ 11,266

[1] The Company adopted ASU 2016-13, Measurement of Credit Losses on Financial Instruments, during the first quarter of 2020.

[2] The Company adopted Accounting Standards Update (“ASU”) 2019-12, Simplifying the Accounting for Income Taxes, during the first quarter of 2021.