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Deferred Compensation Plans (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Postemployment Benefits [Abstract]    
Participant's maximum compensation deferral percentage 90.00%  
Company owned life insurance $ 966,000 $ 312,000
Loss (gain) on company owned life insurance 67,000 (12,000)
Deferred compensation obligation $ 992,000 $ 261,000
Deferred restricted stock shares 104,590  
Deferred compensation arrangement with individual, shares issued (in shares) 32,037  
Deferred compensation arrangement, fair value of shares issued $ 816,373