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Securities - Schedule of Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Available for Sale Securities, Amortized Cost
Due in one year or less, Amortized Cost	$ 20,615
Due from one year to five years, Amortized Cost	89,283
Due from five years to ten years, Amortized Cost	20,723
Due after ten years, Amortized Cost	10,354
Available for Sale Securities, with single maturity date, Amortized Cost	140,975
Total Available for sale securities, Amortized Cost	185,579	$ 251,381
Available for Sale Securities, Fair Value
Due in one year or less, Fair Value	20,509
Due from one year to five years, Fair Value	87,951
Due from five years to ten years, Fair Value	20,278
Due after ten years, Fair Value	10,205
Available for Sale Securities, with single maturity date, Fair Value	138,943
Available for Sale Securities, Fair Value	183,184	250,603
Held to Maturity Securities, Amortized Cost
Due from five years to ten years, Amortized Cost	3,352
Due after ten years, Amortized Cost	5,321
Held to Maturity Securities, with single maturity date, Amortized Cost	8,673
Held to maturity securities, Amortized Cost	8,673	8,557
Held to Maturity Securities, Fair Value
Due from five years to ten years, Fair Value	3,282
Due after ten years, Fair Value	4,811
Held to Maturity Securities, with single maturity date, Fair Value	8,093
Held to Maturity Securities, Fair Value	8,093	$ 7,527
Mortgage-backed Securities, Residential
Available for Sale Securities, Amortized Cost
Available for Sale Securities, without single maturity date, Amortized Cost	30,525
Available for Sale Securities, Fair Value
Available for Sale Securities, without single maturity date, Fair Value	30,238
Asset Backed Securities
Available for Sale Securities, Amortized Cost
Available for Sale Securities, without single maturity date, Amortized Cost	10,713
Available for Sale Securities, Fair Value
Available for Sale Securities, without single maturity date, Fair Value	10,666
SBA Pooled Securities
Available for Sale Securities, Amortized Cost
Available for Sale Securities, without single maturity date, Amortized Cost	3,366
Available for Sale Securities, Fair Value
Available for Sale Securities, without single maturity date, Fair Value	$ 3,337

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