CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2009	$ 339,070	$ 87,364	$ 956,401	$ 2,756	$ (245,519)	$ (473,391)	$ 11,459
Balance (in shares) at Dec. 31, 2009		349,456				(37,128)
Stock plans	3,303	0	(11,623)	0	0	14,926	0
Stock plans (in shares)		0				1,064
Dividends on common stock	(156,706)	0	(78,355)	(78,351)	0	0	0
Net income	79,411	0	0	77,686	0	0	1,725
Other comprehensive income, net of tax	7,954	0	0	0	7,954	0	0
Distributions	(1,500)	0	0	0	0	0	(1,500)
Balance at Jun. 30, 2010	271,532	87,364	866,423	2,091	(237,565)	(458,465)	11,684
Balance (in shares) at Jun. 30, 2010		349,456				(36,064)
Stock plans	8,673	0	(16,506)	0	0	25,179	0
Stock plans (in shares)		0				1,933
Dividends on common stock	(372,683)	0	(372,712)	29	0	0	0
Net income	76,306	0	0	74,987	0	0	1,319
Other comprehensive income, net of tax	8,016	0	0	0	8,016	0	0
Acquisition of the Acquired Business	5,217,899	169,633	5,048,266	0	0	0	0
Acquisition of the Acquired Business (in shares)		678,530
Balance at Dec. 31, 2010	5,209,743	256,997	5,525,471	77,107	(229,549)	(433,286)	13,003
Balance (in shares) at Dec. 31, 2010		1,027,986				(34,131)
Stock plans	5,687	0	(13,338)	0	0	19,025	0
Stock plans (in shares)		0				1,379
Dividends on common stock	(373,215)	0	(373,215)	0	0	0	0
Net income	90,040	0	0	86,972	0	0	3,068
Other comprehensive income, net of tax	4,990	0	0	0	4,990	0	0
Distributions	(3,000)	0	0	0	0	0	(3,000)
Balance at Jun. 30, 2011	$ 4,934,245	$ 256,997	$ 5,138,918	$ 164,079	$ (224,559)	$ (414,261)	$ 13,071
Balance (in shares) at Jun. 30, 2011		1,027,986				(32,752)