Equity Transactions and Stock-Based Compensation Plans (Schedule of Restricted Stock Unit Activity) (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Time-Based RSUs [Member]
Number of Shares [Abstract]
Granted, Number of Award Units	0	0	151,919	347,335
Weighted-Average Price Per Share [Abstract]
Granted, Weighted-Average Grant-Date Fair Value per Unit	$ 0.00		$ 4.08	$ 8.44
Performance-Based RSUs [Member]
Number of Shares [Abstract]
Granted, Number of Award Units	145,107	0	439,773	321,606
Weighted-Average Price Per Share [Abstract]
Granted, Weighted-Average Grant-Date Fair Value per Unit	$ 8.34		$ 5.76	$ 9.90