Condensed Consolidated Statement of Equity (USD $)		Total	Redeemable Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]
Balance, value at Dec. 31, 2010		$ 2,444,994,000		$ 2,908,000	$ 5,581,525,000	$ (178,978,000)	$ (2,960,082,000)	$ (379,000)
Redeemable preferred stock, carrying amount at Dec. 31, 2010			316,581,000
Balance, shares at Dec. 31, 2010				290,826,284
Redeemable preferred stock, shares outstanding at Dec. 31, 2010			6,361,000
Stock-based compensation related activity, net of forfeitures, value		10,147,000		9,000	10,138,000	0	0	0
Conversion of redeemable convertible preferred stock into common stock, preferred stock amount converted			0
Stock-based compensation related activity, net of forfeitures, shares				917,919
Purchases and retirement of capital stock, value		(42,225,000)		(10,000)	(42,215,000)	0	0	0
Purchases and retirement of capital stock, shares				(1,026,331)
Other comprehensive income (loss)	[1]	15,157,000		0	0	14,781,000	0	376,000
Dividends on preferred stock and amortization of issue costs, preferred stock			232,000
Dividends on preferred stock and amortization of issue costs, accumulated deficit		(5,201,000)		0	0	0	(5,201,000)	0
Net income (loss)		40,124,000		0	0	0	40,017,000	107,000
Redeemable preferred stock, carrying amount at Mar. 31, 2011			316,813,000
Balance, value at Mar. 31, 2011		2,462,996,000		2,907,000	5,549,448,000	(164,197,000)	(2,925,266,000)	104,000
Balance, shares at Mar. 31, 2011				290,717,872
Redeemable preferred stock, shares outstanding at Mar. 31, 2011			6,361,000
Balance, value at Dec. 31, 2011		2,386,864,000		2,844,000	5,312,342,000	(116,996,000)	(2,811,945,000)	619,000
Redeemable preferred stock, carrying amount at Dec. 31, 2011		305,032,000	305,032,000
Balance, shares at Dec. 31, 2011		284,449,372		284,449,372
Redeemable preferred stock, shares outstanding at Dec. 31, 2011		6,111,000	6,111,000
Stock-based compensation related activity, net of forfeitures, value		9,230,000		9,000	9,221,000	0	0	0
Conversion of redeemable convertible preferred stock into common stock, preferred stock shares converted			(6,111,000)
Conversion of redeemable convertible preferred stock into common stock, preferred stock amount converted			(305,180,000)
Conversion of redeemable convertible preferred stock into common stock, common stock shares issued				8,285,905
Conversion of redeemable convertible preferred stock into common stock, common stock amount issued		305,180,000		83,000	305,097,000	0	0	0
Stock-based compensation related activity, net of forfeitures, shares				883,941
Purchases and retirement of capital stock, value		(35,476,000)		(7,000)	(35,469,000)	0	0	0
Purchases and retirement of capital stock, shares				(690,733)
Other comprehensive income (loss)	[1]	23,227,000		0	0	23,953,000	0	(726,000)
Dividends on preferred stock and amortization of issue costs, preferred stock			148,000
Dividends on preferred stock and amortization of issue costs, accumulated deficit		(2,629,000)		0	0	0	(2,629,000)	0
Net income (loss)		50,270,000		0	0	0	50,031,000	239,000
Redeemable preferred stock, carrying amount at Mar. 31, 2012		0	0
Balance, value at Mar. 31, 2012		$ 2,736,666,000		$ 2,929,000	$ 5,591,191,000	$ (93,043,000)	$ (2,764,543,000)	$ 132,000
Balance, shares at Mar. 31, 2012		292,928,485		292,928,485
Redeemable preferred stock, shares outstanding at Mar. 31, 2012		0	0

[1] See the statement of operations and other comprehensive income (loss) for the allocation of the components of "other comprehensive income (loss)."