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Securities - Unrealized Losses (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Amortized cost and fair values of securities    
Less than 12 Months $ 1,663 $ 0
12 Months or More 976 2,633
Total 2,639 2,633
Unrealized loss of securities    
Less than 12 Months, Unrealized Loss (6) 0
12 Months or More (3) (40)
Unrealized Loss (9) (40)
Mortgage Backed Securities Residential [Member]    
Amortized cost and fair values of securities    
Less than 12 Months 0 0
12 Months or More 0 904
Total 0 904
Unrealized loss of securities    
Less than 12 Months, Unrealized Loss 0 0
12 Months or More 0 (38)
Unrealized Loss 0 (38)
Collateralized mortgage obligations - residential [Member]    
Amortized cost and fair values of securities    
Less than 12 Months 1,663 0
12 Months or More 976 1,729
Total 2,639 1,729
Unrealized loss of securities    
Less than 12 Months, Unrealized Loss (6) 0
12 Months or More (3) (2)
Unrealized Loss $ (9) $ (2)