Equity Transactions and Stock-Based Compensation Plans Schedule of Restricted Stock Activity (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Granted, Number of Award Units			49,748	32,360
Granted, Weighted-Average Grant-Date Fair Value per Unit			$ 8.04	$ 12.36
Time-Based RSUs [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Granted, Number of Award Units	0	12,750	356,813	246,223
Granted, Weighted-Average Grant-Date Fair Value per Unit		$ 15.50	$ 8.21	$ 11.20
Performance-Based RSUs [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Granted, Number of Award Units	0	0	221,495	146,479
Granted, Weighted-Average Grant-Date Fair Value per Unit			$ 9.85	$ 10.23