Commitments And Contingencies (Schedule Of Future Minimum Lease Payments) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
2014	$ 55,300
2015	47,100
2016	39,600
2017	24,600
2018	20,500
Thereafter	35,600
Total payments	$ 222,700