Debt and Capital Lease Obligations - Debt Covenants (Details) $ in Millions	9 Months Ended
	Oct. 31, 2017 USD ($)
Debt Disclosure [Abstract]
Debt Instrument, Actual Interest Coverage Ratio	1.75
Minimum Interest Coverage Ratio	1.10
Debt Instrument, Actual Leverage Ratio	2.49
Debt Instrument, Maximum Leverage Ratio	4
Debt Instrument, Actual ABS Excluded Leverage Ratio	1.71
Debt Instrument, Maximum ABS Excluded Leverage Ratio	2
Debt Instrument, Actual Cash Recovery Percentage	4.80%
ABS Excluded Leverage Ratio must not exceed maximum	4.45%
Capital Expenditures, net, must not exceed maximum	$ 1.0
Maximum Capital Expenditures, Net	$ 75.0