Stock Plans (Details) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
All Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of stock-based compensation plan	5
Number of stock-based compensation plans under which no further awards may be granted (the EIP)	3
Shares authorized for grant under the plans (in shares)	12,540,761
Shares available for grant the plans (in shares)	3,281,422
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Measurement period	3 years
Period considered for evaluating performance metrics	90 days
Number of shares granted (in shares)	930,020
Expense recognized during the period	$ 200,000
Restricted Stock [Member]
Number of Shares [Roll Forward]
Balance at beginning of period (in shares)	4,847,000
Restricted stock granted (in shares)	3,816,000	1,712,000
Restricted stock vested (in shares)	(1,173,000)
Restricted stock forfeited (in shares)	(250,000)
Balance at end of period (in shares)	7,240,000
Weighted Average Grant Date Fair Value [Abstract]
Balance at beginning of period (in dollars per shares)	$ 8.40
Restricted stock granted (in dollars per shares)	$ 4.19	$ 9.4
Restricted stock vested (in dollars per shares)	$ 8.99
Restricted stock forfeited (in dollars per shares)	$ 6.15
Balance at end of period (in dollars per shares)	$ 6.17
Aggregate Fair Value [Abstract]
Balance at beginning of period	24,962,000
Restricted stock granted	14,615,000	13,800,000
Restricted stock vested	4,493,000	7,900,000
Balance at end of period	27,730,000	41,000,000
Remaining unrecognized compensation cost associated with unvested restricted stock awards	33,000,000
Weighted average period over which unvested restricted stock awards unrecognized compensation cost is expected to be recognized (in years)	2
Stock Options [Member]
Shares Subject to Option [Roll forward]
Balance at beginning of period (in shares)	895,000
Options granted (in shares)	0	0
Options exercised (in shares)	0	10,000
Options canceled, forfeited or lapsed (in shares)	(338,000)
Balance at end of period (in shares)	557,000
Exercisable at end of period (in shares)	557,000
Weighted Average Option Price Per Share [Abstract]
Balance at beginning of period (in dollars share)	$ 9.94
Options granted (in dollars per share)	$ 0
Options exercised (in dollars per share)	$ 0
Options canceled, forfeited or lapsed (in dollars per share)	$ 8.19
Balance at end of period (in dollars per share)	$ 11.01
Exercisable at end of period (in dollars per share)	$ 11.01
Weighted Average Remaining Life in Years [Abstract]
Balance at beginning of period (in years)	1.3
Balance at end of period (in years)	1.4
Exercisable at end of period (in years)	1.4
Aggregate Intrinsic Value [Abstract]
Balance at beginning of period	0
Balance at end of period	0	0
Exercisable at end of period	0	0
Cash received upon exercise of options during the period		$ 100,000