Contractual Obligations, Commitments and Contingent Liabilities (Schedule of Commitments) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Commitments [Line Items]
Other Commitment	$ 126,990	$ 129,376
Residential mortgage- home equity [Member]
Other Commitments [Line Items]
Other Commitment	49,294	52,251
Residential Mortgage - Construction [Member]
Other Commitments [Line Items]
Other Commitment	6,790	13,512
Commercial Loan [Member]
Other Commitments [Line Items]
Other Commitment	63,668	56,968
Consumer Loan [Member]
Other Commitments [Line Items]
Other Commitment	3,847	4,012
Standby Letters of Credit [Member]
Other Commitments [Line Items]
Other Commitment	$ 3,391	$ 2,633