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 $190 and $1,017 for the three months ended March 31, 2012 and 2011, respectively	16,232	6	16,226
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation, including tax benefit of $190 and $1,017 for the three months ended March 31, 2012 and 2011, respectively (in shares)		578,218
Stock repurchases	(10,971)	(4)	(10,967)
Stock repurchases (in shares)		(384,169)
Parent cash dividends declared	(37,601)			(37,601)
Comprehensive Income (Loss):
Currency translation adjustment	22,478				22,518	(40)
Net income (loss)	74,619			73,460		1,159
Noncontrolling interests dividends	(33)					(33)
Balance at Mar. 31, 2011	2,017,589	2,003	1,233,914	721,169	52,000	8,503
Balance (in shares) at Mar. 31, 2011		200,258,115
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 $190 and $1,017 for the three months ended March 31, 2012 and 2011, respectively	8,568	2	8,566
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation, including tax benefit of $190 and $1,017 for the three months ended March 31, 2012 and 2011, respectively (in shares)		144,581
Stock repurchases	(34,688)	(11)	(34,677)
Stock repurchases (in shares)		(1,103,149)
Parent cash dividends declared	(42,791)			(42,791)
Comprehensive Income (Loss):
Currency translation adjustment	27,947				27,489	458
Net income (loss)	55,980			55,350		630
Noncontrolling interests equity contributions	39					39
Noncontrolling interests dividends	(508)					(508)
Balance at Mar. 31, 2012	$ 1,268,803	$ 1,712	$ 317,492	$ 915,126	$ 25,286	$ 9,187
Balance (in shares) at Mar. 31, 2012	171,182,398	171,182,398