Stock Plans (Restricted Shares Outstanding) (Details) (Restricted Stock [Member], USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at beginning of period (in shares)	6,234,000
Shares granted (in shares)	3,741,000	521,000
Shares vested (in shares)	(2,254,000)
Shares forfeited (in shares)	(57,000)
Balance at end of period (in shares)	7,664,000
Balance at beginning of period (in dollars per shares)	$ 4.80
Restricted stock granted (in dollars per shares)	$ 4.71
Restricted stock vested (in dollars per shares)	$ 5.25
Restricted stock forfeited (in dollars per shares)	$ 4.50
Balance at end of period (in dollars per shares)	$ 4.63	$ 4.09
Balance at beginning of period	$ 28,988,000
Restricted stock granted	21,359,000	2,100,000
Restricted stock vested	12,867,000	7,200,000
Balance at end of period	$ 43,764,000	$ 21,300,000