Commitments and Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Oct. 31, 2015	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014	Jan. 31, 2015
Loss Contingencies
Loss Contingency Accrual, Period Increase (Decrease)		$ (9,563)	$ (6,229)	$ (9,563)	$ (6,229)
SPAIN | Interest Expense
Loss Contingencies
Loss Contingency Accrual, Period Increase (Decrease)		(9,000)
SPAIN | Value added tax assessment
Loss Contingencies
Loss Contingency Accrual, Period Increase (Decrease)		(16,400)	$ (6,229)		$ (6,229)
SPAIN | Accrued Liabilities
Loss Contingencies
Loss Contingency Accrual, Period Increase (Decrease)		(25,400)
Loss Contingency Accrual		17,100		17,100		$ 43,700
BRAZIL
Loss Contingencies
Loss Contingency, Estimate of Possible Loss		19,400		19,400		24,600
European Subsidiary [Member] | Accrued Liabilities
Loss Contingencies
Loss Contingency Accrual		6,800		6,800
Synthetic Lease
Loss Contingencies
Residual Value Guarantee, Aggregate Amount		133,800		133,800
Operating Leases, Future Minimum Payments Due		2,700		2,700
Financial Guarantee
Loss Contingencies
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 17,500		$ 17,500		$ 5,500
Scenario, Forecast [Member] | SPAIN | Accrued Liabilities
Loss Contingencies
Loss Contingency Accrual, Payments	$ 12,500