Securities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) Security	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) Security
Debt Securities, Available-for-sale [Abstract]
Amortized cost	$ 158,599		$ 150,976
Gross unrealized gains	748		298
Gross unrealized loss	(1,528)		(3,027)
Fair value	157,819		148,247
Securities Available-for-sale [Abstract]
Realized gains on sales of securities	36	$ 80
Realized losses on sales of securities	(10)	0
Net realized gain	26	$ 80
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	35		59
More Than Twelve Months	1,493		2,968
Total	1,528		3,027
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	15,754		14,427
More Than Twelve Months	81,991		91,252
Total	$ 97,745		$ 105,679
Unrealized loss position, Number of securities | Security	57		88
U.S. Treasury Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized cost	$ 22,350		$ 12,323
Gross unrealized gains	39		6
Gross unrealized loss	(2)		(1)
Fair value	22,387		12,328
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	2		1
More Than Twelve Months	0		0
Total	2		1
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	9,998		2,484
More Than Twelve Months	0		0
Total	9,998		2,484
Obligations of U.S. Government Agencies [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized cost	13,163		10,868
Gross unrealized gains	7		2
Gross unrealized loss	(125)		(156)
Fair value	13,045		10,714
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	33		47
More Than Twelve Months	92		109
Total	125		156
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	5,756		6,014
More Than Twelve Months	4,707		3,206
Total	10,463		9,220
Obligations of States and Political Subdivisions [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized cost	41,832		49,194
Gross unrealized gains	388		155
Gross unrealized loss	(78)		(512)
Fair value	42,142		48,837
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	0		10
More Than Twelve Months	78		502
Total	78		512
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	0		5,829
More Than Twelve Months	14,070		23,727
Total	14,070		29,556
Mortgage-backed Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized cost	74,876		73,444
Gross unrealized gains	261		93
Gross unrealized loss	(1,314)		(2,346)
Fair value	73,823		71,191
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	0		0
More Than Twelve Months	1,314		2,346
Total	1,314		2,346
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	0		0
More Than Twelve Months	62,822		63,930
Total	62,822		63,930
Money Market Investments [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized cost	2,636		1,897
Gross unrealized gains	0		0
Gross unrealized loss	0		0
Fair value	2,636		1,897
Corporate Bonds and Other Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized cost	3,742		3,250
Gross unrealized gains	53		42
Gross unrealized loss	(9)		(12)
Fair value	3,786		3,280
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]
Less Than Twelve Months	0		1
More Than Twelve Months	9		11
Total	9		12
Securities Available-for-Sale, Fair Value [Abstract]
Less than Twelve Months	0		100
More Than Twelve Months	392		389
Total	$ 392		$ 489