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Securities, Amortized Cost and Fair Value of Securities Available for Sale (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Securities Available for Sale [Abstract]    
Amortized cost $ 70,817 $ 72,198
Gross unrealized gains 399 780
Gross unrealized (losses) (1,533) (825)
Fair value 69,683 72,153
Obligations of U.S. Government Corporations and Agencies [Member]    
Securities Available for Sale [Abstract]    
Amortized cost 53,313 52,872
Gross unrealized gains 26 113
Gross unrealized (losses) (1,315) (608)
Fair value 52,024 52,377
Obligations of States and Political Subdivisions [Member]    
Securities Available for Sale [Abstract]    
Amortized cost 14,754 15,124
Gross unrealized gains 60 191
Gross unrealized (losses) (208) (60)
Fair value 14,606 15,255
Corporate Bonds [Member]    
Securities Available for Sale [Abstract]    
Amortized cost 2,362 3,816
Gross unrealized gains 313 476
Gross unrealized (losses) 0 (153)
Fair value 2,675 [1] 4,139
Mutual Funds [Member]    
Securities Available for Sale [Abstract]    
Amortized cost 388 386
Gross unrealized gains 0 0
Gross unrealized (losses) (10) (4)
Fair value $ 378 $ 382
[1] Current Moody’s Ratings is B2.