Equity Transactions and Stock-Based Compensation Plans Schedule of Restricted Stock Activity (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 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	151,500	130,570	356,813	233,473
Granted, Weighted-Average Grant-Date Fair Value per Unit	$ 7.04	$ 12.51	$ 8.21	$ 10.97
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