CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock, at Cost	Non-controlling Interests
Balance, value at Dec. 31, 2010	$ 4,054,125	$ 2,142	$ 2,311,421	$ 3,867,420	$ 10,626	$ (2,158,129)	$ 20,645
Balance, shares at Dec. 31, 2010		170,717
Net income (loss)	(46,662)			(53,861)			7,199
Other comprehensive income, net of tax	21,583				21,583
Dividends declared	(15,763)			(15,763)
Distributions to noncontrolling interests	(5,268)						(5,268)
Issuance of common stock under benefit plans, value	4,667	7	562			4,098
Issuance of common stock under benefit plans, shares		839
Stock-based compensation expense	18,945		18,121			824
Exercise of stock options, value	53,788		(11,032)			64,820
Exercise of stock options, shares		1,285
Shares to cover employee payroll tax withholdings on stock issued under benefit plans, value	(19,013)		(3)	(19,010)
Shares to cover employee payroll tax withholdings on stock issued under benefit plans, shares		(334)
Tax benefits associated with stock-based compensation plans	5,765		5,765
Purchases of treasury stock, value	(835,001)					(835,001)
Purchases of treasury stock, shares		(15,378)
Other	838						838
Balance, value at Mar. 31, 2011	3,238,004	2,146	2,305,827	3,797,796	32,209	(2,923,388)	23,414
Balance, shares at Mar. 31, 2011		157,129
Balance, value at Dec. 31, 2011	3,714,999	2,146	2,347,518	4,263,599	(8,067)	(2,912,324)	22,127
Balance, shares at Dec. 31, 2011		157,420
Net income (loss)	168,515			159,118			9,397
Other comprehensive income, net of tax	18,627				18,627
Dividends declared	(27,070)			(27,070)
Distributions to noncontrolling interests	(5,884)						(5,884)
Issuance of common stock under benefit plans, value	4,587	8	659			3,920
Issuance of common stock under benefit plans, shares		851
Stock-based compensation expense	20,068		19,258			810
Exercise of stock options, value	64,399		(6,978)			71,377
Exercise of stock options, shares		1,401
Shares to cover employee payroll tax withholdings on stock issued under benefit plans, value	(17,733)	(3)	(17,730)
Shares to cover employee payroll tax withholdings on stock issued under benefit plans, shares		(307)
Tax benefits associated with stock-based compensation plans	4,425		4,425
Purchases of treasury stock, value	(50,000)					(50,000)
Purchases of treasury stock, shares		(847)
Other	1,124						1,124
Balance, value at Mar. 31, 2012	$ 3,896,057	$ 2,151	$ 2,347,152	$ 4,395,647	$ 10,560	$ (2,886,217)	$ 26,764
Balance, shares at Mar. 31, 2012		158,518