Business And Summary Of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014	Jan. 31, 2015
Accounting Policies [Abstract]
Operating Expenses, Restatement and Remediation Related	$ 164	$ 5,378	$ 782	$ 17,614
Gain (Loss) Related to Litigation Settlement	21,527	0	60,038	0
Accounts receivable sold	390,300		390,300		$ 310,900
Discount fees on sale of accounts receivable	$ 987	$ 1,400	$ 1,900	$ 2,700