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Long-term Compensation Plans - Stock Options (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award    
Stock options (in shares) 229,724 256,202
Weighted average strike price (in dollars per share) $ 11.28 $ 13.30
Weighted average grant date fair value (in dollars per share) 5.15 $ 6.05
Weighted average exercise price of outstanding options (in dollars per share) $ 13.30  
Outstanding stock options vested (in shares) 66,464  
Vested options outstanding, aggregate intrinsic value $ 0.2  
Nonvested options (in shares) 233,415  
Aggregate intrinsic value of nonvested options $ 0.1  
Exercise Price $13.50    
Share-based Compensation Arrangement by Share-based Payment Award    
Number of outstanding options (in shares) 49,130  
Employee Stock Option    
Share-based Compensation Arrangement by Share-based Payment Award    
Vesting period 3 years  
Award expiration period 10 years