Summary of Significant Accounting Policies Foreign Currency (Details) (USD $)	3 Months Ended	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Foreign Currency [Abstract]
Net Gain (Loss) on Foreign Currency Transactions		$ (3,726,000)	$ 4,672,000	$ (2,147,000)
Transaction Gain Related to Arbitration Award	$ 7,489,000		$ 7,489,000