Shares and Stockholders' Equity (Reconciliation Of The Denominator Calculations Of Basic And Diluted EPS) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reconciliation of the denominator (number of shares) in the calculations of basic and diluted earnings (loss) per common share
Weighted-average shares, as used in basic calculation	263,546,308	277,883,878	266,701,799	282,989,766
Shares to cover exercise of outstanding warrants	9,920,368	10,150,192	10,073,503	10,150,218
Shares to cover conversion of preferred stock	1,455	153,886	99,716	154,165
Shares to cover non-vested stock	1,601,684	1,141,821	1,411,833	1,087,724
Average stock options outstanding during the period	3,206,314	513,722	2,511,175	540,976
Assumed acquisition of shares with assumed proceeds from exercising outstanding warrants	(2,199,597)	(4,840,576)	(2,911,005)	(4,787,407)
Assumed acquisition of shares with assumed proceeds and benefits from exercising stock options (at average market price for the period)	(2,191,630)	(352,501)	(1,792,019)	(371,115)
Shares repurchaseable from measured but unrecognized stock option expense	(190,894)	(210)	(138,683)	(5,553)
Weighted-average shares, as used in diluted calculation	273,694,008	284,650,212	275,956,319	289,758,774