Securities - Schedule of Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Available for Sale Securities, Amortized Cost
Due in one year or less, Amortized Cost	$ 30,577
Due from one year to five years, Amortized Cost	118,179
Due from five years to ten years, Amortized Cost	32,427
Due after ten years, Amortized Cost	21,243
Available for Sale Securities, with single maturity date, Amortized Cost	202,426
Total Available for sale securities, Amortized Cost	256,381	$ 275,468
Available for Sale Securities, Fair Value
Due in one year or less, Fair Value	30,540
Due from one year to five years, Fair Value	117,532
Due from five years to ten years, Fair Value	32,363
Due after ten years, Fair Value	21,100
Available for Sale Securities, with single maturity date, Fair Value	201,535
Available for Sale Securities, Fair Value	255,609	275,029
Held to Maturity Securities, Amortized Cost
Due after ten years, Amortized Cost	8,557
Held to Maturity Securities, with single maturity date, Amortized Cost	8,557
Held to maturity securities, Amortized Cost	8,557	29,352
Held to Maturity Securities, Fair Value
Due after ten years, Fair Value	7,527
Held to Maturity Securities, with single maturity date, Fair Value	7,527
Held to Maturity Securities, Fair Value	7,527	$ 30,821
Mutual Fund
Available for Sale Securities, Amortized Cost
Available for Sale Securities, without single maturity date, Amortized Cost	5,000
Available for Sale Securities, Fair Value
Available for Sale Securities, without single maturity date, Fair Value	5,006
Mortgage-backed Securities, Residential
Available for Sale Securities, Amortized Cost
Available for Sale Securities, without single maturity date, Amortized Cost	33,537
Available for Sale Securities, Fair Value
Available for Sale Securities, without single maturity date, Fair Value	33,663
Asset Backed Securities
Available for Sale Securities, Amortized Cost
Available for Sale Securities, without single maturity date, Amortized Cost	11,883
Available for Sale Securities, Fair Value
Available for Sale Securities, without single maturity date, Fair Value	11,845
SBA Pooled Securities
Available for Sale Securities, Amortized Cost
Available for Sale Securities, without single maturity date, Amortized Cost	3,535
Available for Sale Securities, Fair Value
Available for Sale Securities, without single maturity date, Fair Value	$ 3,560

Available for sale securities equity maturities without single maturity date amortized cost.

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

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Amount after adjustments of available-for-sale debt securities at cost, maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of available-for-sale debt securities maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount after adjustments of available-for-sale debt securities at cost, maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of available-for-sale debt securities maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of investment in available-for-sale debt securities with a single maturity date.

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Amount of investment in available-for-sale debt securities with a single maturity date at cost, after adjustments, including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in the statement of income and fair value hedge accounting adjustments.

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Amount after adjustments of available-for-sale debt securities at cost, maturing in the next fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of available-for-sale debt securities maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of available-for-sale debt securities at cost, net of adjustments, that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the cost over several maturity groupings. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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Fair value of held-to-maturity debt securities maturing after the tenth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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