Commitments And Contingencies (Details) - complaint				1 Months Ended
	Oct. 03, 2017	Apr. 26, 2017	Aug. 17, 2016	Dec. 29, 2016
Securities Complaints [Member]
Loss Contingencies [Line Items]
Number of complaints			3
Securities Complaints [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Period required to file reply	45 days
Derivative Complaints [Member]
Loss Contingencies [Line Items]
Number of complaints				2
Barnes Complaint [Member]
Loss Contingencies [Line Items]
Number of complaints		2