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Securities - Schedule of Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Available for Sale Securities, Amortized Cost
Due in one year or less, Amortized Cost	$ 97,927
Due from one year to five years, Amortized Cost	142,072
Due from five years to ten years, Amortized Cost	33,653
Due after ten years, Amortized Cost	9,434
Available for Sale Securities, with single maturity date, Amortized Cost	283,086
Available for sale securities, Amortized Cost	337,988	$ 251,381
Available for Sale Securities, Fair Value
Due in one year or less, Fair Value	97,560
Due from one year to five years, Fair Value	141,574
Due from five years to ten years, Fair Value	33,370
Due after ten years, Fair Value	9,314
Available for Sale Securities, with single maturity date, Fair Value	281,818
Available for Sale Securities, Fair Value	336,423	250,603
Held to Maturity Securities, Amortized Cost
Due from five years to ten years, Amortized Cost	6,648
Due after ten years, Amortized Cost	1,839
Held to Maturity Securities, with single maturity date, Amortized Cost	8,487
Held to maturity securities, Amortized Cost	8,487	8,557
Held to Maturity Securities, Fair Value
Due from five years to ten years, Fair Value	5,713
Due after ten years, Fair Value	1,613
Held to Maturity Securities, with single maturity date, Fair Value	7,326
Held to Maturity Securities, Fair Value	7,326	7,527
Mortgage-backed Securities, Residential
Available for Sale Securities, Amortized Cost
Available for Sale Securities, without single maturity date, Amortized Cost	39,971
Available for sale securities, Amortized Cost	39,971	33,537
Available for Sale Securities, Fair Value
Available for Sale Securities, without single maturity date, Fair Value	39,736
Available for Sale Securities, Fair Value	39,736	33,663
Asset Backed Securities
Available for Sale Securities, Amortized Cost
Available for Sale Securities, without single maturity date, Amortized Cost	10,165
Available for sale securities, Amortized Cost	10,165	11,883
Available for Sale Securities, Fair Value
Available for Sale Securities, without single maturity date, Fair Value	10,145
Available for Sale Securities, Fair Value	10,145	11,845
SBA Pooled Securities
Available for Sale Securities, Amortized Cost
Available for Sale Securities, without single maturity date, Amortized Cost	4,766
Available for sale securities, Amortized Cost	4,766	3,535
Available for Sale Securities, Fair Value
Available for Sale Securities, without single maturity date, Fair Value	4,724
Available for Sale Securities, Fair Value	$ 4,724	$ 3,560

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