Shares and Stockholders' Equity (Reconciliation Of The Denominator Calculations Of Basic And Diluted EPS) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 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	262,271,670	266,367,162	262,503,816	268,305,694
Shares to cover exercise of outstanding warrants	4,106,444	10,150,032	5,650,623	10,150,070
Shares to cover conversion of preferred stock		146,840		149,661
Shares to cover non-vested stock	1,370,136	1,351,093	1,464,908	1,316,907
Average stock options outstanding during the period	3,669,928	2,600,595	3,784,391	2,163,605
Assumed acquisition of shares with assumed proceeds from exercising outstanding warrants	(875,064)	(2,903,393)	(1,194,789)	(3,266,708)
Assumed acquisition of shares with assumed proceeds and benefits from exercising stock options (at average market price for the period)	(2,552,316)	(1,912,155)	(2,626,035)	(1,592,213)
Shares repurchaseable from measured but unrecognized stock option expense	(85,468)	(141,826)	(95,257)	(112,577)
Average deferred compensation shares	1,030,237		1,036,339
Weighted-average shares, as used in diluted calculation	268,935,567	275,658,348	270,523,996	277,114,439