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	(17,070)	0	0	18,591	0	1,521
Stock plans (in shares)	0				1,370
Dividends on common stock	0	(186,605)	0	0	0	0	(186,605)
Net income	0	0	54,711	0	0	1,485	56,196
Other comprehensive income (loss), net of tax	0	0	0	1,655	0	0	1,655
Distributions	0	0	0	0	0	(1,500)	(1,500)
Balance at Mar. 31, 2011	256,997	5,321,796	131,818	(227,894)	(414,695)	12,988	5,081,010
Balance (in shares) at Mar. 31, 2011	1,027,986				(32,761)
Stock plans	0	11,369	0	0	(306)	0	11,063
Stock plans (in shares)	0				(97)
Dividends on common stock	0	(559,782)	0	0	0	0	(559,782)
Net income	0	0	94,903	0	0	6,509	101,412
Other comprehensive income (loss), net of tax	0	0	0	(159,069)	0	0	(159,069)
Distributions	0	0	0	0	0	(5,500)	(5,500)
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	(44,045)	0	0	44,985	0	940
Stock plans (in shares)	0				3,384
Dividends on common stock	0	0	(99,851)	0	0	0	(99,851)
Net income	0	0	26,768	0	0	3,722	30,490
Other comprehensive income (loss), net of tax	0	0	0	4,267	0	0	4,267
Distributions	0	0	0	0	0	(5,000)	(5,000)
Balance at Mar. 31, 2012	$ 256,997	$ 4,729,338	$ 153,638	$ (382,696)	$ (370,016)	$ 12,719	$ 4,399,980
Balance (in shares) at Mar. 31, 2012	1,027,986				(29,474)