Commitments And Contingencies (Narrative) (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2019 USD ($) claim	Dec. 31, 2018 USD ($)
James J. Cotter, Jr., Derivative Litigation [Member]
Commitments And Contingencies [Line Items]
Settlement awarded	$ 1,550,000
Litigation expense	782,000	$ 3,500,000
Coverage limit	$ 10,000,000
Employment Litigation [Member]
Commitments And Contingencies [Line Items]
Number of new claims filed | claim	2