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Subordinated Debentures (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended
Dec. 31, 2018
Mar. 31, 2019
Dec. 31, 2008
Dec. 31, 2003
Subsidiary, Sale of Stock [Line Items]        
Subordinated debentures $ 14,767,000 $ 14,776,000   $ 5,155,000
Holding Company's investment in the common stock       $ 155,000
Private Placement [Member]        
Subsidiary, Sale of Stock [Line Items]        
Holding Company, closed a pooled private offering       5,000
Trust preferred securities with a liquidation amount       $ 1
Subordinated Debt [Member]        
Subsidiary, Sale of Stock [Line Items]        
Maturity date   Dec. 30, 2033    
Required principal payments over next five years   $ 0    
Number of years with no principal repayment   5 years    
Maximum number of years for deferred interest payments   5 years    
Subordinated Debt [Member] | Subordinated debentures mature on December 30, 2033 [Member]        
Subsidiary, Sale of Stock [Line Items]        
Holding Company may redeem the subordinated debentures in a principal amount with integral multiples     $ 1  
Percentage in which holding company redeem subordinated debentures     100.00%  
Trust preferred securities and subordinated debentures have a stated percentage 5.65% 5.44%    
Subordinated Debt [Member] | London Interbank Offered Rate (LIBOR) [Member] | Subordinated debentures mature on December 30, 2033 [Member]        
Subsidiary, Sale of Stock [Line Items]        
Variable rate spread   2.85%    
Subordinated Debt [Member] | Private Placement [Member] | Fixed-To-Floating Rate Subordinated Notes [Member]        
Subsidiary, Sale of Stock [Line Items]        
Maturity date Dec. 30, 2028      
Subordinated notes $ 10,000,000 $ 9,621,000    
Debt issuance costs $ 388,000      
Interest rate 7.00%      
Subordinated Debt [Member] | Private Placement [Member] | London Interbank Offered Rate (LIBOR) [Member] | Fixed-To-Floating Rate Subordinated Notes [Member]        
Subsidiary, Sale of Stock [Line Items]        
Variable rate spread 4.14%