Financing Arrangements - Letters of Credit Outstanding (Details) - USD ($) $ in Thousands		Jan. 31, 2018	Jan. 31, 2017
JPMorgan Chase and Wells Fargo
Line of Credit Facility [Line Items]
Letters of credit outstanding (a)	[1]	$ 1,097	$ 514

[1] Any draws required under the LOC' would be settled with available cash or borrowings under the Credit Agreement.