Securities (Schedule of Investments' Gross Unrealized Losses and Fair Value Aggregated by Security Type and Length of Time that Individual Securities have been in a Continuous Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Schedule of Investments [Line Items]
Less than 12 Months, Fair Value	$ 32,768	$ 29,629
Less than 12 Months, Unrealized Losses	(130)	(433)
12 Months or More, Fair Value	67,714	186,285
12 Months or More, Unrealized Losses	(850)	(7,011)
Total, Fair Value	100,482	215,914
Total, Unrealized Losses	(980)	(7,444)
States and Political Subdivisions [Member]
Schedule of Investments [Line Items]
Less than 12 Months, Fair Value	7,697	19,140
Less than 12 Months, Unrealized Losses	(12)	(390)
12 Months or More, Fair Value	481	56,740
12 Months or More, Unrealized Losses	(2)	(1,600)
Total, Fair Value	8,178	75,880
Total, Unrealized Losses	(14)	(1,990)
Corporate Obligations [Member]
Schedule of Investments [Line Items]
Less than 12 Months, Fair Value	0	2,045
Less than 12 Months, Unrealized Losses	0	(21)
12 Months or More, Fair Value	3,109	6,595
12 Months or More, Unrealized Losses	(4)	(235)
Total, Fair Value	3,109	8,640
Total, Unrealized Losses	(4)	(256)
Mortgage-backed Securities-Government Sponsored Entities [Member]
Schedule of Investments [Line Items]
Less than 12 Months, Fair Value	25,071	8,444
Less than 12 Months, Unrealized Losses	(118)	(22)
12 Months or More, Fair Value	64,124	122,950
12 Months or More, Unrealized Losses	(844)	(5,176)
Total, Fair Value	89,195	131,394
Total, Unrealized Losses	$ (962)	$ (5,198)