Securities (Schedule of Securities with Unrealized Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	$ 62,706	$ 94,322
Less than 12 Months Unrealized Loss	(219)	(887)
12 Months or More Fair Value	168,306	405,289
12 Months or More Unrealized Loss	(1,967)	(13,192)
Total Fair Value	231,012	499,611
Total Unrealized Loss	(2,186)	(14,079)
Obligations of State and Political Subdivisions
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	512	37,936
Less than 12 Months Unrealized Loss	(4)	(286)
12 Months or More Fair Value	0	49,071
12 Months or More Unrealized Loss	0	(1,037)
Total Fair Value	512	87,007
Total Unrealized Loss	(4)	(1,323)
MBS/CMO - Residential
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	62,194	56,386
Less than 12 Months Unrealized Loss	(215)	(601)
12 Months or More Fair Value	168,306	356,218
12 Months or More Unrealized Loss	(1,967)	(12,155)
Total Fair Value	230,500	412,604
Total Unrealized Loss	$ (2,182)	$ (12,756)