Securities - Summary of Debt Securities - Available for Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 102,566	$ 100,446
Gross Unrealized Gains	70	159
Gross Unrealized Losses	(2,750)	(1,255)
Fair Value	99,886	99,350
U.S. Treasury and federal agency
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,536	4,541
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(125)	(69)
Fair Value	4,411	4,472
U.S. government sponsored entities and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	21,007	14,136
Gross Unrealized Gains	20	2
Gross Unrealized Losses	(437)	(212)
Fair Value	20,590	13,926
U.S. agency mortgage-backed securities: residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	23,236	20,904
Gross Unrealized Gains	0	7
Gross Unrealized Losses	(692)	(153)
Fair Value	22,544	20,758
U.S. agency collateralized mortgage obligations: residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	21,168	22,607
Gross Unrealized Gains	32	25
Gross Unrealized Losses	(946)	(708)
Fair Value	20,254	21,924
State and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	25,112	29,249
Gross Unrealized Gains	12	87
Gross Unrealized Losses	(464)	(96)
Fair Value	24,660	29,240
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,507	9,009
Gross Unrealized Gains	6	38
Gross Unrealized Losses	(86)	(17)
Fair Value	$ 7,427	$ 9,030

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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