Securities (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) Security	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) Security	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) Security
Debt Securities, Available-for-sale [Abstract]
Amortized cost	$ 144,593		$ 144,593		$ 150,976
Gross unrealized gains	1,587		1,587		298
Gross unrealized losses	(727)		(727)		(3,027)
Fair value	145,453		145,453		148,247
Securities Available-for-sale [Abstract]
Realized gains on sales of securities	0	$ 51	36	$ 131
Realized losses on sales of securities	0	(11)	(10)	(11)
Net realized gain	0	$ 40	26	$ 120
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	5		5		59
More Than Twelve Months	722		722		2,968
Total	727		727		3,027
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	3,012		3,012		14,427
More Than Twelve Months	56,374		56,374		91,252
Total	$ 59,386		$ 59,386		$ 105,679
Unrealized loss position, Number of securities | Security	28		28		88
U.S. Treasury Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized cost	$ 12,377		$ 12,377		$ 12,323
Gross unrealized gains	103		103		6
Gross unrealized losses	0		0		(1)
Fair value	12,480		12,480		12,328
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months					1
More Than Twelve Months					0
Total					1
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months					2,484
More Than Twelve Months					0
Total					2,484
Obligations of U.S. Government Agencies [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized cost	11,633		11,633		10,868
Gross unrealized gains	16		16		2
Gross unrealized losses	(77)		(77)		(156)
Fair value	11,572		11,572		10,714
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	5		5		47
More Than Twelve Months	72		72		109
Total	77		77		156
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	3,012		3,012		6,014
More Than Twelve Months	5,565		5,565		3,206
Total	8,577		8,577		9,220
Obligations of States and Political Subdivisions [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized cost	41,303		41,303		49,194
Gross unrealized gains	830		830		155
Gross unrealized losses	(1)		(1)		(512)
Fair value	42,132		42,132		48,837
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	0		0		10
More Than Twelve Months	1		1		502
Total	1		1		512
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	0		0		5,829
More Than Twelve Months	1,527		1,527		23,727
Total	1,527		1,527		29,556
Mortgage-backed Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized cost	72,254		72,254		73,444
Gross unrealized gains	564		564		93
Gross unrealized losses	(645)		(645)		(2,346)
Fair value	72,173		72,173		71,191
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	0		0		0
More Than Twelve Months	645		645		2,346
Total	645		645		2,346
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	0		0		0
More Than Twelve Months	49,086		49,086		63,930
Total	49,086		49,086		63,930
Money Market Investments [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized cost	3,484		3,484		1,897
Gross unrealized gains	0		0		0
Gross unrealized losses	0		0		0
Fair value	3,484		3,484		1,897
Corporate Bonds and Other Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized cost	3,542		3,542		3,250
Gross unrealized gains	74		74		42
Gross unrealized losses	(4)		(4)		(12)
Fair value	3,612		3,612		3,280
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	0		0		1
More Than Twelve Months	4		4		11
Total	4		4		12
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	0		0		100
More Than Twelve Months	196		196		389
Total	$ 196		$ 196		$ 489