Equity Transactions and Stock-Based Compensation Plans Narrative (Details) (USD $)	3 Months Ended		9 Months Ended				3 Months Ended	9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2011 Performance-Based RSUs, 2011 [Member]	Sep. 30, 2012 Performance-Based RSUs, 2012 [Member]	Jun. 30, 2011 Restricted Stock [Member]	Sep. 30, 2012 Restricted Stock [Member]	Sep. 30, 2011 Restricted Stock [Member]	Sep. 30, 2012 Stock Options [Member]	Sep. 30, 2012 Stock Option [Member]	Sep. 30, 2011 Stock Option [Member]	Sep. 30, 2012 Stock Option [Member]	Sep. 30, 2011 Stock Option [Member]	Sep. 30, 2012 Restricted Stock Units (RSUs) [Member] Time-Based RSUs [Member]	Sep. 30, 2011 Restricted Stock Units (RSUs) [Member] Time-Based RSUs [Member]	Sep. 30, 2012 Restricted Stock Units (RSUs) [Member] Time-Based RSUs [Member]	Sep. 30, 2011 Restricted Stock Units (RSUs) [Member] Time-Based RSUs [Member]	Sep. 30, 2011 Restricted Stock Units (RSUs) [Member] Performance-Based RSUs, 2011 [Member]	Sep. 30, 2012 Restricted Stock Units (RSUs) [Member] Performance-Based RSUs, 2012 [Member]	Sep. 30, 2012 Restricted Stock Units (RSUs) [Member] Performance-Based RSUs [Member]	Sep. 30, 2011 Restricted Stock Units (RSUs) [Member] Performance-Based RSUs [Member]	Sep. 30, 2012 Restricted Stock Units (RSUs) [Member] Performance-Based RSUs [Member]	Sep. 30, 2011 Restricted Stock Units (RSUs) [Member] Performance-Based RSUs [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period									3 years	3 years								3 years	39 months	39 months
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period										10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross											0	0	530,156	602,298
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	6,750	25,233	170,016	337,045
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 4.27	$ 10.02	$ 4.02	$ 6.95
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period								49,748	32,360						0	12,750	356,813	246,223			0	0	221,495	146,479
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value								$ 8.04	$ 12.36							$ 15.50	$ 8.21	$ 11.20					$ 9.85	$ 10.23
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Converted (to) from Other Award Type							166,918
Share-based Compensation Arrangement by Share-based Payment Award, Basis for Determining Award on Market Factors, Percentage					33.33%	33.33%
Share-based Compensation Arrangement by Share-based Payment Award, Basis for Determining Award on Individual Performance Factors, Percentage					66.67%	66.67%