Employee Benefit Plans (Schedule of Allocation of Plan Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Debt and equity instruments included in the plan assets	$ 12,132
Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Debt and equity instruments included in the plan assets	11,891
Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Debt and equity instruments included in the plan assets	241
(Level 1) Quoted Prices in Active Markets for Identical Assets or Liabilities
Defined Benefit Plan Disclosure [Line Items]
Debt and equity instruments included in the plan assets	12,132
(Level 1) Quoted Prices in Active Markets for Identical Assets or Liabilities | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Debt and equity instruments included in the plan assets	11,891
(Level 1) Quoted Prices in Active Markets for Identical Assets or Liabilities | Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Debt and equity instruments included in the plan assets	241
JVB Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Debt and equity instruments included in the plan assets	$ 12,182	$ 13,117