Consolidated Statements Of Changes In Equity (USD $) In Thousands	Total	Common Stock	Capital Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Non-Controlling Interest
Balance at Dec. 31, 2010	$ 2,023,464	$ 433,942	$ 971,293	$ 555,778	$ (2,371)	$ 63,345	$ 1,477
Net income	259,623			256,343			3,280
Other comprehensive income	47,193					47,193
Distributions to non-controlling interest	(443)						(443)
Purchase of treasury stock	(101,154)				(101,154)
Cash dividends paid	(79,140)			(79,140)
Net tax benefit related to equity compensation plans	1,065		1,065
Stock-based compensation	4,731		4,731
Issuance under stock purchase and equity compensation plans, net	15,349	2,539	4,061		8,749
5% stock dividend, net	(327)	9,906	60,915	(157,562)	86,414
Balance at Dec. 31, 2011	2,170,361	446,387	1,042,065	575,419	(8,362)	110,538	4,314
Net income	271,439			269,329			2,110
Other comprehensive income	25,806					25,806
Distributions to non-controlling interest	(1,977)						(1,977)
Purchase of treasury stock	(104,909)				(104,909)
Cash dividends paid	(211,608)			(211,608)
Net tax benefit related to equity compensation plans	2,094		2,094
Stock-based compensation	5,001		5,001
Issuance under stock purchase and equity compensation plans, net	15,588		(16,905)		32,493
5% stock dividend, net	(221)	12,259	70,252	(155,930)	73,198
Balance at Dec. 31, 2012	2,171,574	458,646	1,102,507	477,210	(7,580)	136,344	4,447
Net income	261,117			260,961			156
Other comprehensive income	(126,613)					(126,613)
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued	43,197	1,001	11,125		31,071
Distributions to non-controlling interest	(848)						(848)
Purchase of treasury stock	(69,353)				(69,353)
Cash dividends paid	(82,104)			(82,104)
Net tax benefit related to equity compensation plans	1,003		1,003
Stock-based compensation	6,427		6,427
Issuance under stock purchase and equity compensation plans, net	10,242		(14,824)		25,066
5% stock dividend, net	(245)	21,577	173,710	(206,231)	10,699
Balance at Dec. 31, 2013	$ 2,214,397	$ 481,224	$ 1,279,948	$ 449,836	$ (10,097)	$ 9,731	$ 3,755