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Share Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Share Based Compensation [Abstract]          
Number of additional shares approved for grant (in shares)       400,000  
Shares issued on deferral basis credited percentage of current value 90.00%     90.00%  
Total compensation cost not yet recognized $ 2,500     $ 2,500  
Total compensation cost not yet recognized, period for recognition       2 years  
Long-Term Incentive Plan [Member]          
Share Based Compensation [Abstract]          
Total compensation expense recognized 400 $ 400   $ 800 $ 800
Tax benefit relating to compensation expense recognized $ 100 $ 100   $ 200 $ 200
Restricted Stock [Member] | Long-Term Incentive Plan [Member]          
Share Based Compensation [Abstract]          
Restricted stock and Performance stock units granted (in shares) 0 3,551   52,996 56,267
Restricted Stock [Member] | Long-Term Incentive Plan [Member] | Vesting Over Three Years [Member]          
Share Based Compensation [Abstract]          
Restricted stock and Performance stock units granted (in shares)     2,000.000    
Vesting period     3 years    
Restricted Stock [Member] | Long-Term Incentive Plan [Member] | Cliff Vest After Three Years [Member]          
Share Based Compensation [Abstract]          
Vesting period       3 years 3 years
Performance Stock Units [Member] | Long-Term Incentive Plan [Member]          
Share Based Compensation [Abstract]          
Restricted stock and Performance stock units granted (in shares) 0 0   20,897 22,016
Performance Stock Units [Member] | Long-Term Incentive Plan [Member] | Cliff Vest After Three Years [Member]          
Share Based Compensation [Abstract]          
Vesting period       3 years 3 years
Performance feature comparison period       3 years  
Non-Employee Directors [Member]          
Share Based Compensation [Abstract]          
Number of additional shares approved for grant (in shares)       200,000  
Total compensation expense recognized $ 90 $ 60   $ 170 $ 110
Tax benefit relating to compensation expense recognized $ 20 $ 10   $ 40 $ 20
Directors [Member]          
Share Based Compensation [Abstract]          
Shares issues as retainer fees (in shares)       11,000.000 5,000.000