Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Restricted Stock and Units) (Details)

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Stock-Based Compensation (Restricted Stock and Units) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Class of Stock [Line Items]      
Restricted Stock or Unit Expense   $ 4,017,000 $ 2,124,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Nonvested at beginning of the year, Shares   711,003  
Granted, Shares   1,343,178  
Vested, Shares   (1,966,930)  
Forfeited, Shares   (87,251)  
Nonvested at end of the year, Shares 711,003 0 711,003
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Nonvested at beginning of the year, Weighted-Average Grant Date Fair Value   $ 2.81  
Granted, Weighted-Average Grant Date Fair Value   1.73  
Vested, Weighted-Average Grant Date Fair Value   (2.73) $ (7.83)
Forfeited, Weighted-Average Grant Date Fair Value   3.61  
Nonvested at end of the year, Weighted-Average Grant Date Fair Value $ 2.81 $ 0.00 $ 2.81
Nonvested, Average Remaining Vesting Period   0 years 1 year 8 months 12 days
Granted, Average Remaining Vesting Period   0 years  
Nonvested at beginning of the period, Aggregate Intrinsic Value   $ 1,273,000  
Nonvested at end of the period, Aggregate Intrinsic Value $ 1,273,000 $ 0 $ 1,273,000
Granted, Aggregate Instrinsic Value   $ 0  
Aggregate fair value of restricted stock and restricted stock units vested   5,400,000 $ 1,700,000
Chief Financial Officer [Member]      
Class of Stock [Line Items]      
Stock Issued During Period, Value, New Issues $ 75,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Granted, Shares 41,899    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Granted, Average Remaining Vesting Period 3 years    
Granted, Aggregate Instrinsic Value $ 75,000    
Accelerated Share-based Compensation Expense [Member]      
Class of Stock [Line Items]      
Restricted Stock or Unit Expense   $ 2,000,000