Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands		Total	Common Stock	Treasury Stock, Common [Member]	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest	Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE, April 1, 2020				(2,272)
BALANCE, April 1, 2020				(9,315)
BALANCE, April 1, 2020 at Dec. 31, 2018		$ 4,838,752,000	$ 3,184,000	$ (60,000,000)	$ 1,415,188,000	$ 3,598,876,000	$ (174,950,000)	$ 56,454,000
BALANCE, April 1, 2020 at Dec. 31, 2018			318,418
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		248,609,000				248,609,000
Less: net (loss) income attributable to continuing noncontrolling interest		2,367,000						2,559,000
Net income		251,168,000
Other comprehensive income (loss)		(13,603,000)					(13,603,000)
Purchase of treasury stock				(7,043)
Purchase of treasury stock		(190,762,000)							$ (190,762,000)
Vesting of restricted stock units, net of shares withheld for employee tax			371
Vesting of restricted stock units, net of shares withheld for employee tax		(1,154,000)	$ 4,000		(1,158,000)
Stock-based compensation expense		13,659,000			13,659,000
Exercise of stock options			236
Exercise of stock options		1,870,000	$ 2,000		1,868,000
Tax withholdings related to net share settlements of stock-based compensation awards			(15)
Tax withholdings related to net share settlements of stock-based compensation awards		(428,000)			(428,000)
Capital contributions from, net of dividends declared to, noncontrolling interest shareholder		(15,000)						(15,000)
Acquired noncontrolling interest		(10,261,000)						(10,261,000)
BALANCE, June 30, 2020 at Jun. 30, 2019				(9,315)
BALANCE, June 30, 2020 at Jun. 30, 2019		4,909,748,000	$ 3,190,000	$ (250,762,000)	1,429,129,000	3,847,485,000	(188,553,000)	69,259,000
BALANCE, June 30, 2020 at Jun. 30, 2019			319,010
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE, April 1, 2020				(4,915)
BALANCE, April 1, 2020				(9,315)
BALANCE, April 1, 2020 at Mar. 31, 2019		4,856,774,000	$ 3,189,000	$ (130,462,000)	1,420,685,000	3,696,924,000	(190,854,000)	57,292,000
BALANCE, April 1, 2020 at Mar. 31, 2019			318,889
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		150,561,000				150,561,000
Less: net (loss) income attributable to continuing noncontrolling interest		1,352,000						1,544,000
Net income		152,105,000
Other comprehensive income (loss)		2,301,000					2,301,000
Purchase of treasury stock				(4,400)
Purchase of treasury stock		(120,300,000)		$ (120,300,000)
Vesting of restricted stock units, net of shares withheld for employee tax			68
Vesting of restricted stock units, net of shares withheld for employee tax		(77,000)	$ 1,000		(78,000)
Stock-based compensation expense		7,986,000			7,986,000
Exercise of stock options			53
Exercise of stock options		536,000	$ 0		536,000
Capital contributions from, net of dividends declared to, noncontrolling interest shareholder		162,000						162,000
Acquired noncontrolling interest		(10,261,000)						10,261,000
BALANCE, June 30, 2020 at Jun. 30, 2019				(9,315)
BALANCE, June 30, 2020 at Jun. 30, 2019		4,909,748,000	$ 3,190,000	$ (250,762,000)	1,429,129,000	3,847,485,000	(188,553,000)	69,259,000
BALANCE, June 30, 2020 at Jun. 30, 2019			319,010
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE, April 1, 2020				(9,315)
BALANCE, April 1, 2020				(13,196)
BALANCE, April 1, 2020				(16,496)
BALANCE, April 1, 2020 at Dec. 31, 2019		5,048,580,000	$ 3,199,000	$ (351,813,000)	1,418,239,000	4,140,136,000	(200,885,000)	39,704,000
BALANCE, April 1, 2020 at Dec. 31, 2019			319,927
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU 2016-13 (see Note 3)		(3,000,000)
Adoption of ASU 2016-13 (see Note 3) | Accounting Standards Update 2016-13 [Member]		3,000,000
BALANCE, June 30, 2020 at Mar. 31, 2020				(16,496)
BALANCE, June 30, 2020 at Mar. 31, 2020		4,987,319,000	$ 3,204,000	$ (439,819,000)	1,425,600,000	4,282,753,000	(313,903,000)	29,484,000
BALANCE, June 30, 2020 at Mar. 31, 2020			320,439
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE, April 1, 2020				(16,496)
BALANCE, April 1, 2020 at Dec. 31, 2019		5,048,580,000	$ 3,199,000	$ (351,813,000)	1,418,239,000	4,140,136,000	(200,885,000)	39,704,000
BALANCE, April 1, 2020 at Dec. 31, 2019			319,927
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		263,928,000				263,928,000
Less: net (loss) income attributable to continuing noncontrolling interest		718,000						821,000
Net income		264,749,000
Other comprehensive income (loss)		(78,878,000)					(78,878,000)
Purchase of treasury stock				(3,300)
Purchase of treasury stock		(88,006,000)		$ (88,006,000)
Vesting of restricted stock units, net of shares withheld for employee tax			491
Vesting of restricted stock units, net of shares withheld for employee tax		(2,125,000)	$ 5,000		(2,130,000)
Stock-based compensation expense		15,763,000			15,763,000
Exercise of stock options			112
Exercise of stock options		1,467,000	$ 1,000		1,466,000
Capital contributions from, net of dividends declared to, noncontrolling interest shareholder		314,000
Disposition of subsidiary with noncontrolling interests(1)	[1]	(11,404,000)						(11,404,000)
Adoption of ASU 2016-13 (see Note 3)		(2,519,000)				(2,519,000)
BALANCE, June 30, 2020 at Jun. 30, 2020				(16,496)
BALANCE, June 30, 2020 at Jun. 30, 2020		5,147,941,000	$ 3,205,000	$ (439,819,000)	1,433,338,000	4,401,545,000	(279,763,000)	29,435,000
BALANCE, June 30, 2020 at Jun. 30, 2020			320,530
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE, April 1, 2020				(16,496)
BALANCE, April 1, 2020				(16,496)
BALANCE, April 1, 2020 at Mar. 31, 2020		4,987,319,000	$ 3,204,000	$ (439,819,000)	1,425,600,000	4,282,753,000	(313,903,000)	29,484,000
BALANCE, April 1, 2020 at Mar. 31, 2020			320,439
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		118,792,000				118,792,000
Less: net (loss) income attributable to continuing noncontrolling interest		(22,000)
Net income		118,770,000
Other comprehensive income (loss)		34,140,000					34,140,000
Vesting of restricted stock units, net of shares withheld for employee tax			91
Vesting of restricted stock units, net of shares withheld for employee tax		(56,000)	$ 1,000		(57,000)
Stock-based compensation expense		7,795,000			7,795,000
Capital contributions from, net of dividends declared to, noncontrolling interest shareholder		(27,000)						(27,000)
BALANCE, June 30, 2020 at Jun. 30, 2020				(16,496)
BALANCE, June 30, 2020 at Jun. 30, 2020		$ 5,147,941,000	$ 3,205,000	$ (439,819,000)	$ 1,433,338,000	$ 4,401,545,000	$ (279,763,000)	$ 29,435,000
BALANCE, June 30, 2020 at Jun. 30, 2020			320,530
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE, April 1, 2020				(16,496)

[1] ⁽¹⁾ The amount disposed of in 2020 relates to discontinued operations. See Note 2, "Discontinued Operations," for further information.