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Stock-Based Compensation - Stock Options (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Number of Stock Options      
Balance at the beginning of the period (in shares) 326,460    
Forfeited (in shares) (42,516)    
Expired (in shares) (196,447)    
Balance at the end of the period (in shares) 87,497 326,460  
Exercisable at the end of the period (in shares) 87,497    
Weighted Average Exercise Price      
Balance at the beginning of the period (in dollars per share) $ 11.79    
Forfeited (in dollars per share) 12.48    
Expired (in dollars per share) 11.88    
Balance at the end of the period (in dollars per share) 11.23 $ 11.79  
Exercisable at the end of the period (in dollars per share) $ 11.23    
Weighted Average Remaining Contractual Term      
Outstanding at the end of the period (in years) 6 months 29 days    
Exercisable at the end of the period (in years) 6 months 29 days    
Intrinsic value of outstanding options $ 0    
Options granted (in shares) 0 0 0
Options vested (in shares) 0 0 0
Excess tax benefits from disqualifying dispositions $ 0 $ 0 $ 0
Options exercised (in shares) 0 0 0
Proceeds from exercise of stock options $ 0 $ 0 $ 0
Stock options      
Weighted Average Remaining Contractual Term      
Unrecognized compensation expense related to share-based compensation plans $ 0