CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Items, Net	Noncontrolling Interests
Balance at Dec. 31, 2010	$ 1,952,865	$ 2,001	$ 1,228,655	$ 685,310	$ 29,482	$ 7,417
Balance (in shares) at Dec. 31, 2010		200,064,066
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation, including tax benefit of $309 and $578 for the nine months ended September 30, 2012 and 2011, respectively	94,486	37	94,449
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		3,753,404
Stock repurchases	(548,455)	(172)	(548,283)
Stock repurchases (in shares)		(17,201,540)
Parent cash dividends declared	(135,102)			(135,102)
Currency translation adjustment	(24,814)				(23,930)	(884)
Net income (loss)	365,591			363,482		2,109
Noncontrolling interests equity contributions	217					217
Noncontrolling interests dividends	(1,484)					(1,484)
Balance at Sep. 30, 2011	1,703,304	1,866	774,821	913,690	5,552	7,375
Balance (in shares) at Sep. 30, 2011		186,615,930
Balance at Dec. 31, 2011	1,254,256	1,721	343,603	902,567	(2,203)	8,568
Balance (in shares) at Dec. 31, 2011	172,140,966	172,140,966
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation, including tax benefit of $309 and $578 for the nine months ended September 30, 2012 and 2011, respectively	45,164	11	45,153
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)		1,095,330
Stock repurchases	(34,688)	(11)	(34,677)
Stock repurchases (in shares)		(1,103,149)
Parent cash dividends declared	(135,642)			(135,642)
Currency translation adjustment	21,197				20,473	724
Net income (loss)	148,648			146,214		2,434
Noncontrolling interests equity contributions	336					336
Noncontrolling interests dividends	(1,146)					(1,146)
Parent purchase of noncontrolling interests	1,000					1,000
Balance at Sep. 30, 2012	$ 1,299,125	$ 1,721	$ 354,079	$ 913,139	$ 18,270	$ 11,916
Balance (in shares) at Sep. 30, 2012	172,133,147	172,133,147