Securities (Schedule of Securities with Unrealized Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	$ 15,043	$ 94,322
Less than 12 Months Unrealized Loss	(66)	(887)
12 Months or More Fair Value	265,382	405,289
12 Months or More Unrealized Loss	(3,085)	(13,192)
Total Fair Value	280,425	499,611
Total Unrealized Loss	(3,151)	(14,079)
Obligations of State and Political Subdivisions
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	4,889	37,936
Less than 12 Months Unrealized Loss	(30)	(286)
12 Months or More Fair Value	1,331	49,071
12 Months or More Unrealized Loss	(10)	(1,037)
Total Fair Value	6,220	87,007
Total Unrealized Loss	(40)	(1,323)
MBS/CMO - Residential
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	10,154	56,386
Less than 12 Months Unrealized Loss	(36)	(601)
12 Months or More Fair Value	264,051	356,218
12 Months or More Unrealized Loss	(3,075)	(12,155)
Total Fair Value	274,205	412,604
Total Unrealized Loss	$ (3,111)	$ (12,756)