Summary Of Significant Accounting Policies (Timing Of Performance Obligation) (Narrative) (Details) - Defense [Member] - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-01-01	Dec. 31, 2019
Minimum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Fulfullment period of unsatisfied performance obligations	18 months
Maximum [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Fulfullment period of unsatisfied performance obligations	24 months