CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Gains (Losses) [Member]	Treasury Stock [Member]
Beginning Balance at Dec. 31, 2009	$ 3,630,642	$ 1,439	$ 1,965,513	$ 1,776,498	$ 1,605	$ (114,413)
Beginning Balance, shares at Dec. 31, 2009		143,942,978				4,916,800
Net income	955,457			955,457
Dividends to stockholders	(729,888)			(729,888)
Anti-dilution adjustment paid to stock plan participants	(3,072)			(3,072)
Stock options exercised	31		31
Stock options exercised, shares		646
Stock-based compensation, net of tax	7,006		7,006
Net gain (loss) on foreign currency forward exchange contracts	1,170				1,170
Net gain (loss) on investments	366				366
Ending Balance at Dec. 31, 2010	3,861,712	1,439	1,972,550	1,998,995	3,141	(114,413)
Ending Balance, Shares at Dec. 31, 2010		143,943,624				4,916,800
Net income	962,542			962,542
Dividends to stockholders	(486,595)			(486,595)
Anti-dilution adjustment paid to stock plan participants	(2,632)			(2,632)
Stock options exercised, shares		385
Stock-based compensation, net of tax	5,819		5,819
Net gain (loss) on foreign currency forward exchange contracts	(7,353)				(7,353)
Net gain (loss) on investments	(430)				(430)
Ending Balance at Dec. 31, 2011	4,333,063	1,439	1,978,369	2,472,310	(4,642)	(114,413)
Ending Balance, Shares at Dec. 31, 2011		143,944,009				4,916,800
Net income	720,477			720,477
Dividends to stockholders	(486,603)			(486,603)
Anti-dilution adjustment paid to stock plan participants	(3,269)			(3,269)
Stock options exercised	148		148
Stock options exercised, shares		4,361
Stock-based compensation, net of tax	5,440		5,440
Net gain (loss) on foreign currency forward exchange contracts	6,970				6,970
Net gain (loss) on investments	168				168
Ending Balance at Dec. 31, 2012	$ 4,576,394	$ 1,439	$ 1,983,957	$ 2,702,915	$ 2,496	$ (114,413)
Ending Balance, Shares at Dec. 31, 2012		143,948,370				4,916,800