Commitments And Contingencies (Details)				1 Months Ended
	Apr. 26, 2017 complaint	Oct. 17, 2016 plaintiff	Aug. 17, 2016 complaint	Dec. 29, 2016 complaint
Securities Complaints [Member]
Loss Contingencies [Line Items]
Number of complaints			3
Number of plaintiffs | plaintiff		6
Derivative Complaints [Member]
Loss Contingencies [Line Items]
Number of complaints				2
Barnes Complaint [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Number of complaints	2