Investments, Amortized Cost, Gross Unrealized Gains and Losses and Fair Value of Investment (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Securities [Abstract]
Amortized cost	$ 318,444	$ 287,521
Gross unrealized gains	5,497	7,912
Gross unrealized losses	(1,974)	(244)
Fair value	321,967	295,189
U.S. Agency Securities [Member]
Debt Securities [Abstract]
Amortized cost	78,375	79,065
Gross unrealized gains	2,020	2,403
Gross unrealized losses	(686)	(52)
Fair value	79,709	81,416
U.S. Treasury Securities [Member]
Debt Securities [Abstract]
Amortized cost	39,995	27,442
Gross unrealized gains	458	601
Gross unrealized losses	(91)	0
Fair value	40,362	28,043
Obligations of State and Political Subdivisions [Member]
Debt Securities [Abstract]
Amortized cost	101,007	100,089
Gross unrealized gains	1,771	2,938
Gross unrealized losses	(433)	(55)
Fair value	102,345	102,972
Corporate Obligations [Member]
Debt Securities [Abstract]
Amortized cost	6,902	6,413
Gross unrealized gains	86	96
Gross unrealized losses	(5)	0
Fair value	6,983	6,509
Mortgage-backed Securities in Government Sponsored Entities [Member]
Debt Securities [Abstract]
Amortized cost	92,165	74,512
Gross unrealized gains	1,162	1,874
Gross unrealized losses	(759)	(137)
Fair value	$ 92,568	$ 76,249

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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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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