Securities - Schedule of Securities with Gross Unrealized Losses, Investment Category and Length of Time in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Securities in Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 0	$ 18,080
Less than 12 months, unrealized (losses)	0	(135)
12 months or more, fair value	34,270	41,272
12 months or more, unrealized (losses)	(418)	(1,273)
Total, fair value	34,270	59,352
Total, unrealized (losses)	(418)	(1,408)
Obligations of U.S. Government Corporations and Agencies [Member]
Securities in Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	0	14,901
Less than 12 months, unrealized (losses)	0	(104)
12 months or more, fair value	33,977	37,186
12 months or more, unrealized (losses)	(401)	(1,186)
Total, fair value	33,977	52,087
Total, unrealized (losses)	(401)	(1,290)
Obligations of States and Political Subdivisions [Member]
Securities in Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	0	3,179
Less than 12 months, unrealized (losses)	0	(31)
12 months or more, fair value	293	4,086
12 months or more, unrealized (losses)	(17)	(87)
Total, fair value	293	7,265
Total, unrealized (losses)	$ (17)	$ (118)