CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) (USD $) In Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2010	$ 256,997	$ 5,525,471	$ 77,107	$ (229,549)	$ (433,286)	$ 13,003	$ 5,209,743
Balance (in shares) at Dec. 31, 2010	1,027,986				(34,131)
Stock plans	0	(13,338)	0	0	19,025	0	5,687
Stock plans (in shares)	0				1,379
Dividends on common stock	0	(373,215)	0	0	0	0	(373,215)
Net income	0	0	86,972	0	0	3,068	90,040
Other comprehensive income (loss), net of tax	0	0	0	4,990	0	0	4,990
Distributions	0	0	0	0	0	(3,000)	(3,000)
Balance at Jun. 30, 2011	256,997	5,138,918	164,079	(224,559)	(414,261)	13,071	4,934,245
Balance (in shares) at Jun. 30, 2011	1,027,986				(32,752)
Stock plans	0	7,637	0	0	(740)	0	6,897
Stock plans (in shares)	0				(106)
Dividends on common stock	0	(373,172)	0	0	0	0	(373,172)
Net income	0	0	62,642	0	0	4,926	67,568
Other comprehensive income (loss), net of tax	0	0	0	(162,404)	0	0	(162,404)
Distributions	0	0	0	0	0	(4,000)	(4,000)
Balance at Dec. 31, 2011	256,997	4,773,383	226,721	(386,963)	(415,001)	13,997	4,469,134
Balance (in shares) at Dec. 31, 2011	1,027,986				(32,858)
Stock plans	0	(40,990)	0	0	45,859	0	4,869
Stock plans (in shares)	0				3,373
Dividends on common stock	0	0	(199,702)	0	0	0	(199,702)
Net income	0	0	44,757	0	0	7,732	52,489
Other comprehensive income (loss), net of tax	0	0	0	9,834	0	0	9,834
Distributions	0	0	0	0	0	(5,000)	(5,000)
Balance at Jun. 30, 2012	$ 256,997	$ 4,732,393	$ 71,776	$ (377,129)	$ (369,142)	$ 16,729	$ 4,331,624
Balance (in shares) at Jun. 30, 2012	1,027,986				(29,485)