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Investment Securities (Held-to-maturity Securities with Unrealized Loss) (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
securities
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
securities
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
securities
Schedule of Held-to-maturity Securities [Line Items]          
Less than 12 months, fair value $ 637   $ 637   $ 9,397
Less than 12 months, unrealized loss $ 1   $ 1   $ 68
Less than 12 months, no. of securities | securities 1   1   2
12 months or more, fair value $ 0   $ 0   $ 890
12 months or more, unrealized loss $ 0   $ 0   $ 27
12 months or more, no. of securities | securities 0   0   1
Total fair value $ 637   $ 637   $ 10,287
Total unrealized loss 1   1   95
Gross losses realized 0 $ 0 3 $ 87  
Securities Investment [Member]          
Schedule of Held-to-maturity Securities [Line Items]          
Interest Receivable 3,400   3,400   3,600
Residential mortgage-backed securities          
Schedule of Held-to-maturity Securities [Line Items]          
Less than 12 months, fair value 637   637   7,731
Less than 12 months, unrealized loss $ 1   $ 1   $ 67
Less than 12 months, no. of securities | securities 1   1   1
12 months or more, fair value $ 0   $ 0   $ 890
12 months or more, unrealized loss $ 0   $ 0   $ 27
12 months or more, no. of securities | securities 0   0   1
Total fair value $ 637   $ 637   $ 8,621
Total unrealized loss 1   1   94
Commercial mortgage-backed securities          
Schedule of Held-to-maturity Securities [Line Items]          
Less than 12 months, fair value         1,666
Less than 12 months, unrealized loss         $ 1
Less than 12 months, no. of securities | securities         1
12 months or more, fair value         $ 0
12 months or more, unrealized loss         $ 0
12 months or more, no. of securities | securities         0
Total fair value         $ 1,666
Total unrealized loss $ 0   $ 0   $ 1