Stock Plans (Restricted Shares Outstanding) (Details) (Restricted Stock [Member], USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at beginning of period (in shares)	7,049,000	4,847,000	4,440,000
Shares granted (in shares)	3,360,000	3,976,000	1,734,000
Shares vested (in shares)	(3,097,000)	(1,387,000)	(1,146,000)
Shares forfeited (in shares)	(1,078,000)	(387,000)	(181,000)
Balance at end of period (in shares)	6,234,000	7,049,000	4,847,000
Balance at beginning of period (in dollars per shares)	$ 6.08	$ 8.40	$ 8.29
Restricted stock granted (in dollars per shares)	$ 4.10	$ 4.18	$ 9.38
Restricted stock vested (in dollars per shares)	$ 6.78	$ 8.78	$ 9.52
Restricted stock forfeited (in dollars per shares)	$ 5.26	$ 5.99	$ 7.99
Balance at end of period (in dollars per shares)	$ 4.80	$ 6.08	$ 8.40
Balance at beginning of period	$ 30,169	$ 24,962	$ 43,199
Restricted stock granted	15,626	17,017	8,930
Restricted stock vested	14,403	5,937	5,899
Balance at end of period	$ 28,988	$ 30,169	$ 24,962