Investment Securities (Schedule of amortized cost and estimated fair value by contractual maturity of debt securities - HTM) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Held-to-Maturity Amortized Cost
Due in one year or less	$ 1,563
Due after one year through five years	2,418
Due after five years through ten years	1,596
Sub-total	5,577
Securities - held-to-maturity	6,011	$ 6,052
Held-to-Maturity Fair Value
Due in one year or less	1,565
Due after one year through five years	2,446
Due after five years through ten years	1,685
Sub-total	5,696
Fair Value	6,137	6,030
Mortgage-backed securities - residential
Held-to-Maturity Amortized Cost
Securities - held-to-maturity	434	458
Held-to-Maturity Fair Value
Fair Value	$ 441	$ 463

Amount of investment in debt security measured at amortized cost (held-to-maturity).

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