Commitments and Contingencies Gain Contingency (Details) - Positive Outcome of Litigation [Member] $ in Thousands	Jan. 31, 2017 USD ($)
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	$ 13,750
Trademark Infringement Award, Profits [Member]
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	5,500
Trademark Infringement Award, Punitive Damages [Member]
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	$ 8,250