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Stock-Based Compensation (Summary of Unvested Stock Options) (Details) - $ / shares
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Employee Service Share-based Compensation, Nonvested Awards, Stock Options, Outstanding [Roll Forward]      
Unvested, beginning of period (in shares) 101,836    
Granted (in shares) 0    
Vested (in shares) (49,336)    
Cancelled/Forfeited (in shares) (1,667)    
Unvested, end of period (in shares) 50,833 101,836  
Employee Service Share-based Compensation, Nonvested Awards, Stock Options, Weighted Average Grant Date Fair Value [Roll Forward]      
Unvested, weighted average grant date fair value, beginning of period (in dollars per share) $ 12.67    
Granted, weighted average grant date fair value (in dollars per share) 0.00 $ 10.33 $ 16.56
Vested, weighted average grant date fair value (in dollars per share) 12.74    
Cancelled/Forfeited, weighted average grant date fair value (in dollars per share) 10.33    
Unvested, weighted average grant date fair value, end of period (in dollars per share) $ 12.67 $ 12.67