Stock Plans (Details) (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
All Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of stock-based compensation plans	5
Number of stock-based compensation plans under which no further awards may be granted (the EIP)	3
EIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for grant under the plans (in shares)	12,540,761
Two plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under two plans (in shares)	7,090,425
Stock Options [Member]
Options Outstanding [Abstract]
Balance at beginning of period (in shares)	1,507,000
Options granted (in shares)	0
Options exercised (in shares)	(10,000)
Options canceled, forfeited or lapsed (in shares)	(567,000)
Balance at end of period (in shares)	930,000
Exercisable at end of period (in shares)	930,000
Weighted average option price per share [Abstract]
Balance at beginning of period (in dollars per share)	$ 10.50
Options granted (in dollars per share)	$ 0
Options exercised (in dollars per share)	$ 8.19
Options canceled, forfeited or lapsed (in dollars per share)	$ 11.52
Balance at end of period (in dollars per share)	$ 9.92
Exercisable at end of period (in dollars per share)	$ 9.92
Weighted average remaining life of options in years [Abstract]
Balance at beginning of period (in years)	1.7
Balance at end of period (in years)	1.5
Exercisable at end of period (in years)	1.5
Aggregate intrinsic value [Abstract]
Balance at beginning of period	$ 603,000
Options exercised	12,000
Balance at end of period	0
Exercisable at end of period	0
Restricted Stock [Member]
Restricted shares outstanding [Roll Forward]
Balance at beginning of period (in shares)	4,440,000
Restricted stock granted (in shares)	1,721,000	3,244,000
Restricted stock vested (in shares)	(1,135,000)
Restricted stock forfeited (in shares)	(163,000)
Balance at end of period (in shares)	4,863,000
Weighted average fair value of restricted stock per share [Abstract]
Balance at beginning of period (in dollars per share)	$ 8.29
Restricted stock granted (in dollars per share)	$ 9.41	$ 7.53
Restricted stock vested (in dollars per share)	$ 9.54
Restricted stock forfeited (in dollars per share)	$ 8.03
Balance at end of period (in dollars per share)	$ 8.41
Aggregate fair value [Abstract]
Balance at beginning of period	43,199,000
Restricted stock granted	10,513,000	26,500,000
Restricted stock vested	6,933,000	7,100,000
Balance at end of period	29,711,000	36,600,000
Remaining unrecognized compensation cost associated with unvested restricted stock awards	$ 29,600,000
Weighted average period over which unvested restricted stock awards unrecognized compensation cost is expected (in years)	2