Shares and Stockholders' Equity (Reconciliation Of The Denominator Calculations Of Basic And Diluted EPS) (Details)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
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	262,738,542	270,265,766
Shares to cover exercise of outstanding warrants	7,194,803	10,150,108
Shares to cover conversion of preferred stock		152,512
Shares to cover non-vested stock	1,559,679	1,282,721
Average stock options outstanding during the period	3,898,853	1,726,615
Assumed acquisition of shares with assumed proceeds from exercising outstanding warrants	(1,514,514)	(3,630,023)
Assumed acquisition of shares with assumed proceeds and benefits from exercising stock options (at average market price for the period)	(2,699,754)	(1,272,272)
Shares repurchaseable from measured but unrecognized stock option expense	(105,046)	(83,328)
Average deferred compensation shares	1,042,441
Weighted-average shares, as used in diluted calculation	272,115,004	278,592,099