Employee Benefit Plans (Schedule of Assumptions used to Determine Projected Benefit Obligation of the SERP) (Details) - Supplemental Executive Retirement Plan [Member]		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rate		3.00%	4.10%	3.50%
Rate of increase in compensation levels	[1]

[1] 6.0% graded down to 3.25% over the first seven years of service.