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Equity Transactions and Stock-Based Compensation Plans (Schedule of Restricted Stock and Unit Activity) (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Apr. 30, 2016
Time-Based RSUs [Member]      
Number of Shares [Abstract]      
Equity Instruments Other than Options, Grants in Period 231,834 151,919  
Weighted-Average Price Per Share [Abstract]      
Granted, Weighted-Average Grant-Date Fair Value per Unit $ 1.31 $ 4.08  
Performance-Based RSUs [Member]      
Number of Shares [Abstract]      
Equity Instruments Other than Options, Grants in Period 0 294,666  
Weighted-Average Price Per Share [Abstract]      
Granted, Weighted-Average Grant-Date Fair Value per Unit $ 0.00 $ 4.49  
Subsequent Event [Member] | Performance-Based RSUs, 2013 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Award, Actual Achievement Level, Percentage     72.10%