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Investments, Amortized Cost, Gross Unrealized Gains and Losses and Fair Value of Investment (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Securities [Abstract]
Amortized cost	$ 233,556	$ 242,242
Gross unrealized gains	3,402	752
Gross unrealized losses	(218)	(1,984)
Fair value	236,740	241,010
U.S. Agency Securities [Member]
Debt Securities [Abstract]
Amortized cost	92,468	106,516
Gross unrealized gains	1,869	509
Gross unrealized losses	(106)	(640)
Fair value	94,231	106,385
U.S. Treasury Securities [Member]
Debt Securities [Abstract]
Amortized cost	33,843	33,813
Gross unrealized gains	254	0
Gross unrealized losses	(1)	(455)
Fair value	34,096	33,358
Obligations of State and Political Subdivisions [Member]
Debt Securities [Abstract]
Amortized cost	57,831	52,074
Gross unrealized gains	691	150
Gross unrealized losses	(7)	(177)
Fair value	58,515	52,047
Corporate Obligations [Member]
Debt Securities [Abstract]
Amortized cost	3,000	3,000
Gross unrealized gains	80	34
Gross unrealized losses	0	0
Fair value	3,080	3,034
Mortgage-backed Securities in Government Sponsored Entities [Member]
Debt Securities [Abstract]
Amortized cost	46,414	46,839
Gross unrealized gains	508	59
Gross unrealized losses	(104)	(712)
Fair value	$ 46,818	$ 46,186

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).

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