Consolidated Statements of Stockholders' Equity and Comprehensive Income (Unaudited) (USD $) In Thousands, except Share data	Total	Common Stock	Accumulated Other Comprehensive Income	Additional Paid-in Capital	Accumulated Deficit	Series A Preferred Stock [Member]	Series B Preferred Stock [Member]
Beginning Balance at Dec. 31, 2011	$ 704,145	$ 3,753	$ 71	$ 10,484,400	$ (9,784,092)	$ 0	$ 13
Beginning Balance (in shares) at Dec. 31, 2011		3,753,201,929				0	12,500,000
Comprehensive income, net of tax	107,718		(56)		107,774
Issuance of common stock to employees and employee benefit plans, net of forfeitures	1,308	1		1,307
Issuance of common stock to employees and employee benefit plans, net of forfeitures (in shares)		598,972
Share-based payment expense	13,643			13,643
Exercise of stock options and vesting of restricted stock units	22,765	35		22,730
Exercise of stock options and vesting of restricted stock units (in shares)		34,954,824
Ending Balance at Mar. 31, 2012	$ 849,579	$ 3,789	$ 15	$ 10,522,080	$ (9,676,318)	$ 0	$ 13
Ending Balance (in shares) at Mar. 31, 2012		3,788,755,725				0	12,500,000