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	74,427				70,420			70,420	4,007
Other comprehensive income, net of tax	16,277	[1]					15,158	15,158	1,119
Exercise of stock options (in shares)			269,556
Exercise of stock options	1,525		270	1,255				1,525
Share vesting (in shares)			851,308
Share vesting			851	(851)
Purchase of treasury shares	(6,483)					(6,483)		(6,483)
Stock-based compensation charges	5,615			5,615				5,615
Ending balance at Mar. 31, 2011	1,603,628		241,912	1,363,335	170,793	(92,218)	(148,559)	1,535,263	68,365
Ending balance (in shares) at Mar. 31, 2011			241,912,337
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	65,424				62,758			62,758	2,666
Other comprehensive income, net of tax	2,262	[1]					2,109	2,109	153
Exercise of stock options (in shares)			129,998
Exercise of stock options	552		130	422				552
Share vesting (in shares)			538,676
Share vesting			539	(539)
Purchase of treasury shares	(2,184)					(2,184)		(2,184)
Stock-based compensation charges	3,294			3,294				3,294
Distributions to noncontrolling interests	(15,733)								(15,733)
Ending balance at Mar. 31, 2012	$ 1,787,327		$ 243,085	$ 1,379,153	$ 301,861	$ (98,011)	$ (99,921)	$ 1,726,167	$ 61,160
Ending balance (in shares) at Mar. 31, 2012			243,085,098

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