Debt and Capital Lease Obligations - Debt Covenants (Details) $ in Millions	3 Months Ended
	Apr. 30, 2017 USD ($)
Debt Disclosure [Abstract]
Debt Instrument, Actual Interest Coverage Ratio	1.27
Debt Instrument, Actual Leverage Ratio	2.42
Debt Instrument, Maximum Leverage Ratio	4
Debt Instrument, Actual ABS Excluded Leverage Ratio	0.78
Debt Instrument, Maximum ABS Excluded Leverage Ratio	2
Debt Instrument, Actual Cash Recovery Percentage	6.00%
ABS Excluded Leverage Ratio must not exceed maximum	4.45%
Capital Expenditures, net, must not exceed maximum	$ 4.5
Maximum Capital Expenditures, Net	$ 75.0