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Stock-Based Compensation - Restricted Stock Awards, Textuals (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock awards issued, net of forfeitures $ 1,300 $ 2,200 $ 2,900
Restricted Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense 440 907 1,400
Tax benefit 93 $ 191 $ 488
Total unrecognized compensation expense $ 76    
Weighted average, recognition period 2 months 15 days    
Restricted Stock Awards | Award 1      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years    
Restricted Stock Awards | Award 2      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years