Share-Based Compensation (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended		3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Mar. 31, 2011 2005 Plan [Member]	Jun. 30, 2012 2005 Plan [Member]	Sep. 30, 2012 2005 Plan [Member]	Mar. 31, 2011 Outside Of The Plan [Member]	Jun. 30, 2012 Outside Of The Plan [Member]	Mar. 31, 2011 Nonvested Shares [Member] 2005 Plan [Member]	Jun. 30, 2012 Nonvested Shares [Member] 2005 Plan [Member]	Sep. 30, 2012 Nonvested Shares [Member] 2005 Plan [Member]	Mar. 31, 2011 Nonvested Shares [Member] Outside Of The Plan [Member]	Jun. 30, 2012 Nonvested Shares [Member] Outside Of The Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, options	1,120,000		1,785,000	970,000		250,000	150,000	1,669,800	2,602,500		190,000	105,000
Nonvested shares awarded	3,949,000	2,102,000
Number of share available for awards					13,116,699					1,604,199
Weighted average remaining contractual life for stock options, outstanding	5 years 15 days
Weighted average remaining contractual life for stock options, exercisable	4 years 7 days
Total unrecognized compensation cost	$ 1.7
Unrecognized compensation cost related to shares of nonvested stock grants	$ 1.1
Unrecognized compensation cost expected to be recognized over weighted average period, years	1 year 9 months 18 days