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 $)
 12 Months Ended 17 Months Ended 18 Months Ended 33 Months Ended
Dec. 31, 2013
Dec. 31, 2012
May 24, 2015
Jun. 08, 2015
Sep. 22, 2016
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 553,097   581,709 581,709 581,709
Granted, Shares 248,473        
Vested, Shares (160,762)        
Forfeited, Shares (59,099)        
Nonvested at end of the year, Shares 581,709 553,097      
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 $ 7.60   $ 4.81 $ 4.81 $ 4.81
Granted, Weighted-Average Grant Date Fair Value $ 5.10        
Vested, Weighted-Average Grant Date Fair Value $ 6.74 $ 5.53      
Forfeited, Weighted-Average Grant Date Fair Value $ 7.41        
Nonvested at end of the year, Weighted-Average Grant Date Fair Value $ 4.81 $ 7.60      
Nonvested, Average Remaining Vesting Period     1 year 4 months 26 days 1 year 5 months 10 days  
Granted, Average Remaining Vesting Period         2 years 8 months 23 days
Nonvested at beginning of the period, Aggregate Intrinsic Value $ 4,204,000   $ 2,660,000 $ 2,660,000 $ 2,660,000
Granted, Aggregate Instrinsic Value $ 1,195,000        
Aggregate fair value of restricted stock and restricted stock units vested $ 1,100,000 $ 800,000