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Benefit Plans (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Benefit Plans (Textual) [Abstract]        
Accumulated liability for retirement benefits plan $ 3,465,000 $ 3,182,000 $ 2,957,000 $ 2,760,000
Benefit Plans (Additional Textual) [Abstract]        
Maximum percentage of employer match for employee voluntary contributions 5.00%      
Maximum allowable amount of voluntary contributions by participants for 2017 $ 18,000      
Additional catch-up deferral for plan participants over the age of 50 6,000      
Total expense under the contribution retirement plan 337,000 $ 361,000 $ 349,000  
Officer's Plan        
Benefit Plans (Textual) [Abstract]        
Accumulated liability for retirement benefits plan 2,900,000      
Director's Plan        
Benefit Plans (Textual) [Abstract]        
Accumulated liability for retirement benefits plan $ 600,000      
Term of age        
Benefit Plans (Textual) [Abstract]        
Minimum Age Requirement for Additional Allowable Contributions 50 years      
Supplemental Employee Retirement Plans, Defined Benefit        
Benefit Plans (Textual) [Abstract]        
Accumulated liability for retirement benefits plan $ 3,500,000      
Plan assets $ 0      
Supplemental Employee Retirement Plans, Defined Benefit | Directors and Officers        
Benefit Plans (Textual) [Abstract]        
Post-retirement benefits plan duration 15 years      
Director Retirement Agreements annual benefit $ 10,000      
Director retirement benefits plan duration 10 years      
Supplemental Employee Retirement Plans, Defined Benefit | Executive Officer        
Benefit Plans (Textual) [Abstract]        
Expected benefit expense as specified in the agreements for the entire year 2018 $ 352,000      
Benefits expected to be paid in 2019 approximately $ 164,000