Contingencies (Minimum Self Insurance Payments) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2015
Self Insurance, Future Estimated Payments Due
Estimated self insurance payments due in 2015	$ 400
Estimated self insurance payments due in 2016	375
Estimated self insurance payments due in 2017	375
Estimated self insurance payments due in 2018	375
Estimated self insurance payments due in 2019	375
Estimated self insurance payments due thereafter	250
Estimated self insurance payments, gross	2,150
Discount to net present value	(20)
Estimated self insurance payments, net	$ 2,130