CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands		Total	Common Stock	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2020			112,760,051
Beginning balance at Dec. 31, 2020		$ 5,752,793	$ 2,677,482	$ (6,289)	$ 3,025,106	$ (62,796)	$ 119,290
Beginning balance (in shares) at Dec. 31, 2020				(72,006)
Increase (Decrease) in Shareholders' Equity
Net income		604,054			591,136		12,918
Other comprehensive income (loss)		3,130				3,130
Dividends on common stock		(187,165)			(187,165)
Issuance of common stock (in shares)			92,070
Issuance of common stock		21,070	$ 21,070
Purchase of treasury stock (in shares)	[1]			(17,437)
Purchase of treasury stock	[1]	(1,333)		$ (1,333)
Reissuance of treasury stock for stock-based compensation and other (in shares)				53,290
Reissuance of treasury stock for stock-based compensation and other		4,543		$ 4,543
Capital activities by noncontrolling interests		(10,628)					(10,628)
Other		0			(1)		1
Ending balance (in shares) at Sep. 30, 2021			112,852,121
Ending balance at Sep. 30, 2021		6,186,464	$ 2,698,552	$ (3,079)	3,429,076	(59,666)	121,581
Ending balance (in shares) at Sep. 30, 2021				(36,153)
Beginning balance (in shares) at Jun. 30, 2021			112,819,703
Beginning balance at Jun. 30, 2021		5,834,899	$ 2,692,015	$ (3,079)	3,089,266	(60,578)	117,275
Beginning balance (in shares) at Jun. 30, 2021				(36,153)
Increase (Decrease) in Shareholders' Equity
Net income		344,104			339,798		4,306
Other comprehensive income (loss)		912				912
Dividends on common stock		11			11
Issuance of common stock (in shares)			32,418
Issuance of common stock		6,537	$ 6,537
Other		1			1
Ending balance (in shares) at Sep. 30, 2021			112,852,121
Ending balance at Sep. 30, 2021		$ 6,186,464	$ 2,698,552	$ (3,079)	3,429,076	(59,666)	121,581
Ending balance (in shares) at Sep. 30, 2021				(36,153)
Beginning balance (in shares) at Dec. 31, 2021		113,014,528	113,014,528
Beginning balance at Dec. 31, 2021		$ 6,021,460	$ 2,702,743	$ (6,401)	3,264,719	(54,861)	115,260
Beginning balance (in shares) at Dec. 31, 2021		(87,608)		(87,608)
Increase (Decrease) in Shareholders' Equity
Net income		$ 520,512			507,594		12,918
Other comprehensive income (loss)		1,561				1,561
Dividends on common stock		(192,213)			(192,213)
Issuance of common stock (in shares)			94,200
Issuance of common stock		17,621	$ 17,621
Purchase of treasury stock (in shares)	[1]			(28,620)
Purchase of treasury stock	[1]	(1,994)		$ (1,994)
Reissuance of treasury stock for stock-based compensation and other (in shares)				80,024
Reissuance of treasury stock for stock-based compensation and other		5,792		$ 5,792
Capital activities by noncontrolling interests		(10,628)					(10,628)
Other		$ 2			2
Ending balance (in shares) at Sep. 30, 2022		113,108,728	113,108,728
Ending balance at Sep. 30, 2022		$ 6,362,113	$ 2,720,364	$ (2,603)	3,580,102	(53,300)	117,550
Ending balance (in shares) at Sep. 30, 2022		(36,204)		(36,204)
Beginning balance (in shares) at Jun. 30, 2022			113,078,049
Beginning balance at Jun. 30, 2022		$ 6,021,523	$ 2,712,297	$ (2,976)	3,253,772	(54,814)	113,244
Beginning balance (in shares) at Jun. 30, 2022				(41,531)
Increase (Decrease) in Shareholders' Equity
Net income		330,632			326,326		4,306
Other comprehensive income (loss)		1,514				1,514
Issuance of common stock (in shares)			30,679
Issuance of common stock		8,067	$ 8,067
Purchase of treasury stock (in shares)	[2]			(3,735)
Purchase of treasury stock	[2]	(279)		$ (279)
Reissuance of treasury stock for stock-based compensation and other (in shares)				9,062
Reissuance of treasury stock for stock-based compensation and other		652		$ 652
Other		$ 4			4
Ending balance (in shares) at Sep. 30, 2022		113,108,728	113,108,728
Ending balance at Sep. 30, 2022		$ 6,362,113	$ 2,720,364	$ (2,603)	$ 3,580,102	$ (53,300)	$ 117,550
Ending balance (in shares) at Sep. 30, 2022		(36,204)		(36,204)

[1] Primarily represents shares of common stock withheld from certain stock awards for tax purposes.

[2] Primarily represents shares of common stock withheld from certain stock awards for tax purposes.