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		26,460,000		10,000	26,450,000	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				1,000,308
Purchases and retirement of capital stock, value		(301,369,000)		(73,000)	(301,296,000)	0	0	0
Purchases and retirement of preferred stock, shares			(250,000)
Purchases and retirement of preferred stock, value		(2,538,000)	(12,464,000)				(2,538,000)
Purchases and retirement of capital stock, shares				(7,330,512)
Other comprehensive income (loss)	[1]	38,742,000		0	0	38,376,000	0	366,000
Dividends on preferred stock and amortization of issue costs, preferred stock			693,000
Dividends on preferred stock and amortization of issue costs, accumulated deficit		(15,406,000)		0	0	0	(15,406,000)	0
Acquisition of noncontrolling interest		248,000						248,000
Net income (loss)		122,521,000		0	0	0	122,166,000	355,000
Redeemable preferred stock, carrying amount at Sep. 30, 2011			304,810,000
Balance, value at Sep. 30, 2011		2,313,652,000		2,845,000	5,306,679,000	(140,602,000)	(2,855,860,000)	590,000
Balance, shares at Sep. 30, 2011				284,496,080
Redeemable preferred stock, shares outstanding at Sep. 30, 2011			6,111,000
Balance, value at Jun. 30, 2011		2,368,792,000		2,871,000	5,407,010,000	(141,746,000)	(2,899,597,000)	254,000
Redeemable preferred stock, carrying amount at Jun. 30, 2011			317,045,000
Balance, shares at Jun. 30, 2011				287,099,439
Redeemable preferred stock, shares outstanding at Jun. 30, 2011			6,361,000
Stock-based compensation related activity, net of forfeitures, value		8,449,000		1,000	8,448,000	0	0	0
Stock-based compensation related activity, net of forfeitures, shares				88,793
Purchases and retirement of capital stock, value		(108,806,000)		(27,000)	(108,779,000)	0	0	0
Purchases and retirement of preferred stock, shares			(250,000)
Purchases and retirement of preferred stock, value		(2,538,000)	(12,464,000)				(2,538,000)
Purchases and retirement of capital stock, shares				(2,692,152)
Other comprehensive income (loss)	[1]	1,127,000		0	0	1,144,000	0	(17,000)
Dividends on preferred stock and amortization of issue costs, preferred stock			229,000
Dividends on preferred stock and amortization of issue costs, accumulated deficit		(5,003,000)		0	0	0	(5,003,000)	0
Acquisition of noncontrolling interest		(248,000)						(248,000)
Net income (loss)		51,383,000		0	0	0	51,278,000	105,000
Redeemable preferred stock, carrying amount at Sep. 30, 2011			304,810,000
Balance, value at Sep. 30, 2011		2,313,652,000		2,845,000	5,306,679,000	(140,602,000)	(2,855,860,000)	590,000
Balance, shares at Sep. 30, 2011				284,496,080
Redeemable preferred stock, shares outstanding at Sep. 30, 2011			6,111,000
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		33,813,000		12,000	33,801,000	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)	(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
Stock-based compensation related activity, net of forfeitures, shares				1,124,969
Purchases and retirement of capital stock, value		(35,984,000)		(7,000)	(35,977,000)	0	0	0
Purchases and retirement of capital stock, shares				(699,177)
Other comprehensive income (loss)	[1]	44,661,000		0	0	45,363,000	0	(702,000)
Disposition of noncontrolling interest		368,000						368,000
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)		210,532,000		0	0	0	208,089,000	2,443,000
Redeemable preferred stock, carrying amount at Sep. 30, 2012		0	0
Balance, value at Sep. 30, 2012		2,942,805,000		2,932,000	5,615,263,000	(71,633,000)	(2,606,485,000)	2,728,000
Balance, shares at Sep. 30, 2012		293,161,069		293,161,069
Redeemable preferred stock, shares outstanding at Sep. 30, 2012		0	0
Balance, value at Jun. 30, 2012		2,865,998,000		2,930,000	5,599,106,000	(89,065,000)	(2,648,530,000)	1,557,000
Redeemable preferred stock, carrying amount at Jun. 30, 2012			0
Balance, shares at Jun. 30, 2012				293,038,013
Redeemable preferred stock, shares outstanding at Jun. 30, 2012			0
Stock-based compensation related activity, net of forfeitures, value		16,470,000		2,000	16,468,000	0	0	0
Stock-based compensation related activity, net of forfeitures, shares				127,860
Purchases and retirement of capital stock, value		(311,000)		0	(311,000)	0	0	0
Purchases and retirement of capital stock, shares				(4,804)
Other comprehensive income (loss)	[1]	17,470,000		0	0	17,432,000	0	38,000
Disposition of noncontrolling interest		0						0
Net income (loss)		43,178,000		0	0	0	42,045,000	1,133,000
Redeemable preferred stock, carrying amount at Sep. 30, 2012		0
Balance, value at Sep. 30, 2012		$ 2,942,805,000		$ 2,932,000	$ 5,615,263,000	$ (71,633,000)	$ (2,606,485,000)	$ 2,728,000
Balance, shares at Sep. 30, 2012		293,161,069		293,161,069
Redeemable preferred stock, shares outstanding at Sep. 30, 2012		0

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