Consolidated Statements of Equity (Unaudited) Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 5,896,940	$ 2,560	$ 4,132,696	$ 3,346,615	$ 29,869	$ (2,140,911)	$ 526,111
Common Stock, Dividends, Per Share, Cash Paid	$ 0.33
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 288,862			268,091			20,771
Dividends, Stock	(58,856)			(58,856)
Payments of Ordinary Dividends, Noncontrolling Interest	(29,237)						(29,237)
Other comprehensive income (loss), net of tax	(13,580)				(13,580)
Allocated equity on common unit issuances, net of tax	100,011		41,980				58,031
Stock Issued During Period, Value, Employee Benefit Plan			1,057			(1,057)
Share-based Compensation	8,797		7,961				836
Treasury Stock, Value, Acquired, Cost Method	(27,520)					(27,520)
Payments for Repurchase of Other Equity	(58)						(58)
Adoption of Accounting Standard	(7,447)			(11,019)	3,572
Stockholders' Equity, Other			1	(1)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	1,013,907
Other comprehensive income (loss), net of tax	(10,645)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 6,157,912	2,560	4,183,695	3,544,830	19,861	(2,169,488)	576,454
Common Stock, Dividends, Per Share, Cash Paid	$ 0.33
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 362,913			345,507			17,406
Dividends, Stock	(58,644)			(58,644)
Payments of Ordinary Dividends, Noncontrolling Interest	(31,522)						(31,522)
Other Comprehensive Income (Loss) Change in Current Period	(7,948)				(7,948)
Allocated equity on common unit issuances, net of tax	453		221				232
Stock Issued During Period, Value, Employee Benefit Plan			335			(335)
Share-based Compensation	8,509		7,797				712
Treasury Stock, Value, Acquired, Cost Method	(28,030)					(28,030)
Stockholders' Equity, Other			(3)	3
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 6,403,643	2,560	4,192,045	3,831,696	11,913	(2,197,853)	563,282
Common Stock, Dividends, Per Share, Cash Paid	$ 0.33
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 362,132			342,466			19,666
Dividends, Stock	(58,421)			(58,421)
Payments of Ordinary Dividends, Noncontrolling Interest	(32,369)						(32,369)
Other comprehensive income (loss), net of tax	10,883
Other Comprehensive Income (Loss) Change in Current Period	10,883				10,883
Allocated equity on common unit issuances, net of tax	(61)		0				(61)
Stock Issued During Period, Value, Employee Benefit Plan			(188)			188
Share-based Compensation	8,790		8,082				708
Treasury Stock, Value, Acquired, Cost Method	(131,082)					(131,082)
Adoption of Accounting Standard	0			(3,110)	3,110
Stockholders' Equity, Other	(3)		(1)	(2)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	6,563,512	2,560	4,199,938	4,112,629	25,906	(2,328,747)	551,226
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 6,459,059	2,560	4,196,125	4,196,902	13,623	(2,490,639)	540,488
Common Stock, Dividends, Per Share, Cash Paid	$ 0.33
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 276,486			253,055			23,431
Dividends, Stock	(56,849)			(56,849)
Payments of Ordinary Dividends, Noncontrolling Interest	(33,673)						(33,673)
Other comprehensive income (loss), net of tax	13,775				13,775
Stock Issued During Period, Value, Employee Benefit Plan			3			(3)
Share-based Compensation	9,374		8,713				661
Treasury Stock, Value, Acquired, Cost Method	(73,225)					(73,225)
Payments for Repurchase of Other Equity	(373)						(373)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	791,283
Other comprehensive income (loss), net of tax	3,594
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 6,594,574	2,560	4,204,841	4,393,108	27,398	(2,563,867)	530,534
Common Stock, Dividends, Per Share, Cash Paid	$ 0.33
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 216,817			196,915			19,902
Dividends, Stock	(56,659)			(56,659)
Payments of Ordinary Dividends, Noncontrolling Interest	(33,030)						(33,030)
Other comprehensive income (loss), net of tax	2,804				2,804
Allocated equity on common unit issuances, net of tax	(140)		0				(140)
Stock Issued During Period, Value, Employee Benefit Plan			(138)			138
Share-based Compensation	12,188		11,602				586
Treasury Stock, Value, Acquired, Cost Method	(205,555)					(205,555)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 6,530,999	2,560	4,216,305	4,533,364	30,202	(2,769,284)	517,852
Common Stock, Dividends, Per Share, Cash Paid	$ 0.33
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 297,980			261,813			36,167
Dividends, Stock	(54,500)			(54,500)
Payments of Ordinary Dividends, Noncontrolling Interest	(33,392)						(33,392)
Other comprehensive income (loss), net of tax	(12,985)				(12,985)
Stock Issued During Period, Value, Employee Benefit Plan			(80)			80
Share-based Compensation	9,073		8,545				528
Treasury Stock, Value, Acquired, Cost Method	(195,812)					(195,812)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 6,541,363	$ 2,560	$ 4,224,770	$ 4,740,677	$ 17,217	$ (2,965,016)	$ 521,155