Shares and Stockholders' Equity (Reconciliation Of The Denominator Calculations Of Basic And Diluted EPS) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 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	260,371,956	263,546,308	261,785,387	266,701,799
Shares to cover exercise of outstanding warrants	3,485,992	9,920,368	4,929,079	10,073,503
Shares to cover conversion of preferred stock		1,455		99,716
Shares to cover non-vested stock	1,499,529	1,601,684	1,476,448	1,411,833
Average stock options outstanding during the period	3,863,508	3,206,314	3,810,763	2,511,175
Assumed acquisition of shares with assumed proceeds from exercising outstanding warrants	(689,803)	(2,199,597)	(1,026,460)	(2,911,005)
Assumed acquisition of shares with assumed proceeds and benefits from exercising stock options (at average market price for the period)	(2,720,155)	(2,191,630)	(2,657,408)	(1,792,019)
Shares repurchaseable from measured but unrecognized stock option expense	(63,286)	(190,894)	(84,600)	(138,683)
Average deferred compensation shares	1,037,370		1,036,683
Weighted-average shares, as used in diluted calculation	266,785,111	273,694,008	269,269,892	275,956,319