CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Thousands, except Share data	Total		Common Stock	Capital In Excess of Par Value	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Stockholders' Equity	Non- Controlling Interests
Beginning balance at Dec. 31, 2010	$ 1,512,267		$ 240,791	$ 1,357,316	$ 100,373	$ (85,735)	$ (163,717)	$ 1,449,028	$ 63,239
Beginning balance (in shares) at Dec. 31, 2010			240,791,473
Net income	145,863				137,748			137,748	8,115
Other comprehensive income, net of tax	35,858	[1]					34,348	34,348	1,510
Exercise of stock options (in shares)			399,239
Exercise of stock options	2,091		399	1,692				2,091
Share vesting (in shares)			961,748
Share vesting			962	(962)
Purchase of treasury shares	(7,035)					(7,035)		(7,035)
Stock-based compensation charges	10,524			10,524				10,524
Distributions to noncontrolling interests	(2,500)								(2,500)
Ending balance at Jun. 30, 2011	1,697,068		242,152	1,368,570	238,121	(92,770)	(129,369)	1,626,704	70,364
Ending balance (in shares) at Jun. 30, 2011			242,152,460
Beginning balance at Dec. 31, 2011	1,733,712		242,416	1,375,976	239,103	(95,827)	(102,030)	1,659,638	74,074
Beginning balance (in shares) at Dec. 31, 2011			242,416,424
Net income	119,353				115,497			115,497	3,856
Other comprehensive income, net of tax	(8,409)	[1]					(8,510)	(8,510)	101
Exercise of stock options (in shares)			158,842
Exercise of stock options	716		159	557				716
Share vesting (in shares)			804,338
Share vesting			805	(805)
Purchase of treasury shares	(2,896)					(2,896)		(2,896)
Stock-based compensation charges	7,810			7,810				7,810
Distributions to noncontrolling interests	(15,726)								(15,726)
Ending balance at Jun. 30, 2012	$ 1,834,560		$ 243,380	$ 1,383,538	$ 354,600	$ (98,723)	$ (110,540)	$ 1,772,255	$ 62,305
Ending balance (in shares) at Jun. 30, 2012			243,379,604

[1] The tax impact on amounts presented in other comprehensive income is not significant.