Debt and Capital Lease Obligations - Debt Covenants (Details)
$ in Millions
3 Months Ended
Apr. 30, 2018
USD ($)
Actual  
Interest Coverage Ratio must equal or exceed minimum 2.86
Leverage Ratio must not exceed maximum 2.14
ABS Excluded Leverage Ratio must not exceed maximum 1.20
Cash Recovery Percent must exceed stated amount 5.51%
Capital Expenditures, net, must not exceed maximum $ 11.5
Required Minimum/ Maximum  
Interest Coverage Ratio must equal or exceed minimum 1.25
Leverage Ratio must not exceed maximum 4.00
ABS Excluded Leverage Ratio must not exceed maximum 2.00
ABS Excluded Leverage Ratio must not exceed maximum 4.45%
Capital Expenditures, net, must not exceed maximum $ 75.0
Determination period 12 months