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Securities - Amortized Cost and Fair Value of Available-for-sale Securities (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 198,944,000	$ 204,217,000
Gross Unrealized Gains	1,622,000	441,000
Gross Unrealized Losses	(2,293,000)	(2,970,000)
Fair Value	198,272,685	201,687,683
U.S. Government-sponsored enterprises (GSEs) [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	39,106,000	44,117,000
Gross Unrealized Gains	21,000	12,000
Gross Unrealized Losses	(299,000)	(626,000)
Fair Value	38,828,000	43,503,000
Municipal securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	58,260,000	55,248,000
Gross Unrealized Gains	1,506,000	276,000
Gross Unrealized Losses	(838,000)	(363,000)
Fair Value	58,928,000	55,161,000
Other debt securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	978,000	977,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(43,000)	(67,000)
Fair Value	935,000	910,000
Mortgage-backed securities (GSEs) [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	100,600,000	103,875,000
Gross Unrealized Gains	95,000	153,000
Gross Unrealized Losses	(1,113,000)	(1,914,000)
Fair Value	$ 99,582,000	$ 102,114,000

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).

+ References

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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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