Securities - Schedule of Marketable Securities in Unrealized Loss Position (Details) $ in Thousands	Dec. 31, 2018 USD ($) security	Dec. 31, 2017 USD ($) security
Available for sale:
Total number in a loss position | security	45	36
Less than 12 months, estimated fair value	$ 5,416	$ 29,417
Less than 12 months, unrealized loss	(53)	(294)
12 months and greater, estimated fair value	35,038	10,581
12 months and greater, unrealized loss	(1,197)	(436)
Estimated fair value	40,454	39,998
Unrealized loss	$ (1,250)	$ (730)
Held to maturity:
Held to maturity, Total number in a loss position | security	9	6
Held to maturity, Less than 12 months Estimated fair value	$ 1,277	$ 0
Held to maturity, Less than 12 months Unrealized loss	(15)	0
Held to maturity, 12 months and greater, Estimated fair value	6,687	7,455
Held to maturity, 12 months and greater, Unrealized loss	(269)	(253)
Held to maturity, Total Estimated fair value	7,964	7,455
Held to maturity, Total Unrealized loss	$ (284)	$ (253)
U.S. Government sponsored entities
Available for sale:
Total number in a loss position | security	5	5
Less than 12 months, estimated fair value	$ 0	$ 3,732
Less than 12 months, unrealized loss	0	(40)
12 months and greater, estimated fair value	5,642	1,958
12 months and greater, unrealized loss	(116)	(34)
Estimated fair value	5,642	5,690
Unrealized loss	$ (116)	$ (74)
Held to maturity:
Held to maturity, Total number in a loss position | security	2	2
Held to maturity, Less than 12 months Estimated fair value	$ 0	$ 0
Held to maturity, Less than 12 months Unrealized loss	0	0
Held to maturity, 12 months and greater, Estimated fair value	2,434	2,933
Held to maturity, 12 months and greater, Unrealized loss	(94)	(93)
Held to maturity, Total Estimated fair value	2,434	2,993
Held to maturity, Total Unrealized loss	$ (94)	$ (93)
State and political subdivisions
Available for sale:
Total number in a loss position | security	4	2
Less than 12 months, estimated fair value	$ 0	$ 476
Less than 12 months, unrealized loss	0	(6)
12 months and greater, estimated fair value	3,129	1,792
12 months and greater, unrealized loss	(120)	(50)
Estimated fair value	3,129	2,268
Unrealized loss	$ (120)	$ (56)
Residential mortgage-backed securities
Available for sale:
Total number in a loss position | security	31	22
Less than 12 months, estimated fair value	$ 4,445	$ 20,646
Less than 12 months, unrealized loss	(23)	(218)
12 months and greater, estimated fair value	20,480	4,028
12 months and greater, unrealized loss	(597)	(168)
Estimated fair value	24,925	24,674
Unrealized loss	$ (620)	$ (386)
Held to maturity:
Held to maturity, Total number in a loss position | security	5	2
Held to maturity, Less than 12 months Estimated fair value	$ 1,277	$ 0
Held to maturity, Less than 12 months Unrealized loss	(15)	0
Held to maturity, 12 months and greater, Estimated fair value	821	979
Held to maturity, 12 months and greater, Unrealized loss	(37)	(18)
Held to maturity, Total Estimated fair value	2,098	979
Held to maturity, Total Unrealized loss	$ (52)	$ (18)
Commercial mortgage-backed securities
Held to maturity:
Held to maturity, Total number in a loss position | security	2	2
Held to maturity, Less than 12 months Estimated fair value	$ 0	$ 0
Held to maturity, Less than 12 months Unrealized loss	0	0
Held to maturity, 12 months and greater, Estimated fair value	3,432	3,543
Held to maturity, 12 months and greater, Unrealized loss	(138)	(142)
Held to maturity, Total Estimated fair value	3,432	3,543
Held to maturity, Total Unrealized loss	$ (138)	$ (142)
Corporate and other securities
Available for sale:
Total number in a loss position | security	5	7
Less than 12 months, estimated fair value	$ 971	$ 4,563
Less than 12 months, unrealized loss	(30)	(30)
12 months and greater, estimated fair value	5,787	2,803
12 months and greater, unrealized loss	(364)	(184)
Estimated fair value	6,758	7,366
Unrealized loss	$ (394)	$ (214)