Share-Based Compensation (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended				9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Two Thousand Twelve Stock Option Plan [Member]	May 31, 2012 Two Thousand Twelve Stock Option Plan [Member]	Sep. 30, 2012 1997 Plan [Member]	Sep. 30, 2012 2005 Plan [Member]	May 31, 2005 2005 Plan [Member]	Dec. 31, 2012 Expected to be recognized during 2012 [Member]	Dec. 31, 2013 Expected to be recognized during 2013 [Member]	Dec. 31, 2014 Expected to be recognized during 2014 [Member]
Common stock on date granted term period, years					5		5	10
Shares available for grants					1,500,000	1,500,000		20,635	1,500,000
Combined share-based compensation expense for 2005 Plan and 1997 Plan			$ 1,924,000	$ 2,912,000
Expenses, stock options	1,923,000	2,904,000
Expenses, restricted stock	1,000	8,000
Unrecognized compensation cost	$ 692,000									$ 244,000	$ 400,000	$ 48,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					5 years			10 years