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		635,944			618,720		17,224
Other comprehensive income		7,935				7,935
Dividends on common stock		(379,108)			(379,108)
Issuance of common stock (in shares)			254,477
Issuance of common stock		25,261	$ 25,261
Purchase of treasury stock (in shares)	[1]			(68,892)
Purchase of treasury stock	[1]	(4,655)		$ (4,655)
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		(21,255)					(21,255)
Other		2			1		1
Ending balance (in shares) at Dec. 31, 2021			113,014,528
Ending balance at Dec. 31, 2021		6,021,460	$ 2,702,743	$ (6,401)	3,264,719	(54,861)	115,260
Ending balance (in shares) at Dec. 31, 2021				(87,608)
Increase (Decrease) in Shareholders' Equity
Net income		500,826			483,602		17,224
Other comprehensive income		23,426				23,426
Dividends on common stock		(387,975)			(387,975)
Issuance of common stock (in shares)			232,661
Issuance of common stock		21,996	$ 21,996
Purchase of treasury stock (in shares)	[1]			(77,152)
Purchase of treasury stock	[1]	(5,152)		$ (5,152)
Reissuance of treasury stock for stock-based compensation and other (in shares)				91,147
Reissuance of treasury stock for stock-based compensation and other		6,548		$ 6,548
Capital activities by noncontrolling interests		(21,255)					(21,255)
Other		$ 2	$ 1		1
Ending balance (in shares) at Dec. 31, 2022		113,247,189	113,247,189
Ending balance at Dec. 31, 2022		$ 6,159,876	$ 2,724,740	$ (5,005)	3,360,347	(31,435)	111,229
Ending balance (in shares) at Dec. 31, 2022		(73,613)		(73,613)
Increase (Decrease) in Shareholders' Equity
Net income		$ 518,781			501,557		17,224
Other comprehensive income		(1,709)				(1,709)
Dividends on common stock		(395,585)			(395,585)
Issuance of common stock (in shares)			290,500
Issuance of common stock		27,936	$ 27,936
Purchase of treasury stock (in shares)	[1]			(72,180)
Purchase of treasury stock	[1]	(5,466)		$ (5,466)
Reissuance of treasury stock for stock-based compensation and other (in shares)				32,521
Reissuance of treasury stock for stock-based compensation and other		2,287		$ 2,287
Capital activities by noncontrolling interests		(21,255)					(21,255)
Other		$ (3)		(1)	(2)
Ending balance (in shares) at Dec. 31, 2023		113,537,689	113,537,689
Ending balance at Dec. 31, 2023		$ 6,284,862	$ 2,752,676	$ (8,185)	$ 3,466,317	$ (33,144)	$ 107,198
Ending balance (in shares) at Dec. 31, 2023		(113,272)		(113,272)

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