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Securities - Amortized Cost and Fair Value of Available-for-sale Securities (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 177,915,000	$ 153,566,000
Gross Unrealized Gains	172,000	165,000
Gross Unrealized Losses	(5,048,000)	(1,787,000)
Fair Value	173,038,716	151,944,567
U.S. Government-sponsored enterprises (GSEs) [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	29,127,000	26,207,000
Gross Unrealized Gains	0	1,000
Gross Unrealized Losses	(1,143,000)	(432,000)
Fair Value	27,984,000	25,776,000
Municipal securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	40,438,000	9,122,000
Gross Unrealized Gains	4,000	28,000
Gross Unrealized Losses	(829,000)	(147,000)
Fair Value	39,613,000	9,003,000
Other debt securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	976,000	974,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(52,000)	(24,000)
Fair Value	924,000	950,000
Mortgage-backed securities (GSEs) [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	107,374,000	117,263,000
Gross Unrealized Gains	168,000	136,000
Gross Unrealized Losses	(3,024,000)	(1,184,000)
Fair Value	$ 104,518,000	$ 116,215,000

X

- Definition

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).

+ References

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-Topic 320
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-Section 50
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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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Amortized cost 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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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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