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	162,104				148,699			148,699	13,405
Other comprehensive income, net of tax	21,660	[1]					20,737	20,737	923
Exercise of stock options (in shares)			464,196
Exercise of stock options	2,458		464	1,994				2,458
Share vesting (in shares)			996,252
Share vesting			997	(997)
Purchase of treasury shares	(9,526)					(9,526)		(9,526)
Stock-based compensation charges	14,655			14,655				14,655
Distributions to noncontrolling interests	(2,523)								(2,523)
Ending balance at Sep. 30, 2011	1,701,095		242,252	1,372,968	249,072	(95,261)	(142,980)	1,626,051	75,044
Ending balance (in shares) at Sep. 30, 2011			242,251,921
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	173,644				166,109			166,109	7,535
Other comprehensive income, net of tax	21,623	[1]					21,522	21,522	101
Exercise of stock options (in shares)			191,984
Exercise of stock options	889		192	697				889
Share vesting (in shares)			810,786
Share vesting	(36)		811	(811)		(36)		(36)
Purchase of treasury shares	(2,862)					(2,862)		(2,862)
Stock-based compensation charges	11,449			11,449				11,449
Distributions to noncontrolling interests	(15,728)								(15,728)
Ending balance at Sep. 30, 2012	$ 1,922,691		$ 243,419	$ 1,387,311	$ 405,212	$ (98,725)	$ (80,508)	$ 1,856,709	$ 65,982
Ending balance (in shares) at Sep. 30, 2012			243,419,194

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