Investments, Amortized Cost, Gross Unrealized Gains and Losses and Fair Value of Investment (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Securities [Abstract]
Amortized cost	$ 280,551	$ 237,807
Gross unrealized gains	7,594	3,201
Gross unrealized losses	(307)	(302)
Fair value	287,838	240,706
U.S. Agency Securities [Member]
Debt Securities [Abstract]
Amortized cost	78,095	83,410
Gross unrealized gains	2,647	1,523
Gross unrealized losses	(44)	(70)
Fair value	80,698	84,863
U.S. Treasury Securities [Member]
Debt Securities [Abstract]
Amortized cost	27,430	27,394
Gross unrealized gains	737	267
Gross unrealized losses	0	0
Fair value	28,167	27,661
Obligations of State and Political Subdivisions [Member]
Debt Securities [Abstract]
Amortized cost	89,678	60,667
Gross unrealized gains	2,297	865
Gross unrealized losses	(127)	(77)
Fair value	91,848	61,455
Corporate Obligations [Member]
Debt Securities [Abstract]
Amortized cost	6,423	3,250
Gross unrealized gains	84	78
Gross unrealized losses	0	0
Fair value	6,507	3,328
Mortgage-backed Securities in Government Sponsored Entities [Member]
Debt Securities [Abstract]
Amortized cost	78,925	63,086
Gross unrealized gains	1,829	468
Gross unrealized losses	(136)	(155)
Fair value	$ 80,618	$ 63,399

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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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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