Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Stock-Based Awards (Details)

v3.19.1
Stock-Based Compensation - Stock-Based Awards (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Jul. 27, 2018
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]        
Reverse stock split ratio 15      
Nonvested RSUs        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Nonvested, Beginning Balance (in shares)   302,338    
Granted (in shares)   107,863 180,728 219,742
Vested (in shares)   (156,524)    
Forfeited (in shares)   (18,079)    
Nonvested, Ending Balance (in shares)   235,598 302,338  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]        
Nonvested, Beginning Balance (in dollars per share) | $ / shares   $ 27.10    
Granted (in dollars per share) | $ / shares   12.51 $ 21.19 $ 31.06
Vested (in dollars per share) | $ / shares   29.87    
Forfeited (in dollars per share) | $ / shares   23.82    
Nonvested, Ending Balance (in dollars per share) | $ / shares   $ 18.84 $ 27.10  
Stock-based compensation expense, RSUs | $   $ 2.8 $ 4.0 $ 7.5
Fair value of units vested in period | $   4.7 $ 8.6 $ 10.0
Unrecognized compensation cost | $   $ 1.4    
Weighted-average vesting period   27 months    
Time-based Phantom Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]        
Stock award vesting period   3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Nonvested, Beginning Balance (in shares)   68,759    
Granted (in shares)   106,530 43,245 79,248
Vested (in shares)   (28,387)    
Forfeited (in shares)   (4,117)    
Nonvested, Ending Balance (in shares)   142,785 68,759  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]        
Stock-based compensation expense, RSUs | $   $ 0.3 $ 0.0 $ 1.4
Time-based Phantom Stock Units | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]        
Stock award vesting period   1 year    
Time-based Phantom Stock Units | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]        
Stock award vesting period   3 years    
2010 Long-Term Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized under stock plan   1,120,000    
2010 Long-Term Incentive Plan | Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]        
Shares remaining available under Stock Plan   252,072