Investments, Gross Unrealized Losses and Fair Value and Net Unrealized Gains (Losses) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) Security	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) Security	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Available-for-sale, Debt Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than twelve months, Fair value	$ 37,549		$ 37,549		$ 25,180
Twelve months or greater, Fair value	40,310		40,310		126,094
Total, Fair value	77,859		77,859		151,274
Less than twelve months, Gross unrealized losses	(128)		(128)		(76)
Twelve months or greater, Gross unrealized losses	(133)		(133)		(1,908)
Total, Gross Unrealized Losses	$ (261)		$ (261)		(1,984)
Number of securities owned with fair value less than cost | Security	48		48
Equity securities [Abstract]
Net gains (losses) recognized in equity securities during the period	$ 29	$ (4)	$ 70	$ 9
Less: Net gains realized on the sale of equity securities during the period	0	0	0	0
Net unrealized gains (losses)	29	$ (4)	70	$ 9
Investment securities pledged as collateral	220,800		220,800		221,200
U.S. Agency Securities [Member]
Available-for-sale, Debt Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than twelve months, Fair value	13,096		13,096		5,981
Twelve months or greater, Fair value	26,192		26,192		52,673
Total, Fair value	39,288		39,288		58,654
Less than twelve months, Gross unrealized losses	(44)		(44)		(5)
Twelve months or greater, Gross unrealized losses	(53)		(53)		(635)
Total, Gross Unrealized Losses	(97)		(97)		(640)
U.S. Treasury Securities [Member]
Available-for-sale, Debt Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than twelve months, Fair value	1,989		1,989		4,948
Twelve months or greater, Fair value	0		0		28,410
Total, Fair value	1,989		1,989		33,358
Less than twelve months, Gross unrealized losses	(1)		(1)		(31)
Twelve months or greater, Gross unrealized losses	0		0		(424)
Total, Gross Unrealized Losses	(1)		(1)		(455)
Obligations of State and Political Subdivisions [Member]
Available-for-sale, Debt Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than twelve months, Fair value	2,185		2,185		8,979
Twelve months or greater, Fair value	1,519		1,519		12,441
Total, Fair value	3,704		3,704		21,420
Less than twelve months, Gross unrealized losses	(15)		(15)		(22)
Twelve months or greater, Gross unrealized losses	(2)		(2)		(155)
Total, Gross Unrealized Losses	(17)		(17)		(177)
Mortgage-backed Securities in Government Sponsored Entities [Member]
Available-for-sale, Debt Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than twelve months, Fair value	20,279		20,279		5,272
Twelve months or greater, Fair value	12,599		12,599		32,570
Total, Fair value	32,878		32,878		37,842
Less than twelve months, Gross unrealized losses	(68)		(68)		(18)
Twelve months or greater, Gross unrealized losses	(78)		(78)		(694)
Total, Gross Unrealized Losses	$ (146)		$ (146)		$ (712)