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Investment Securities - Contractual Maturities of Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Available for Sale Amortized Cost
Due within one year	$ 899
Due over one to five years	1,319
Due over five to ten years	4,742
Due over ten years	33,520
Amortized Cost	90,268	$ 95,944
Available for Sale Fair Value
Due within one year	906
Due over one to five years	1,311
Due over five to ten years	4,765
Due over ten years	33,624
Available-for-sale Securities, Fair Value	89,349	94,606
Collaterized mortgage obligations
Available for Sale Amortized Cost
Mortgage-backed, due in monthly installments	24,063	31,997
Available for Sale Fair Value
Mortgage-backed, due in monthly installments	23,514	31,585
Agency mortgage-backed securities
Available for Sale Amortized Cost
Mortgage-backed, due in monthly installments	25,725	27,110
Available for Sale Fair Value
Mortgage-backed, due in monthly installments	$ 25,229	$ 26,683

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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