Debt (Components Of Debt) (Details) (USD $)	Oct. 31, 2013	Jan. 31, 2013	Oct. 31, 2013 Senior Notes	Jan. 31, 2013 Senior Notes	Sep. 30, 2012 Senior Notes	Oct. 31, 2013 Other Committed And Uncommitted Revolving Credit Facilities Expiring on Various Dates Through Fiscal 2017	Jul. 31, 2013 Other Committed And Uncommitted Revolving Credit Facilities Expiring on Various Dates Through Fiscal 2017	Jan. 31, 2013 Other Committed And Uncommitted Revolving Credit Facilities Expiring on Various Dates Through Fiscal 2017
Debt Instrument [Line Items]
Debt, face value			$ 350,000,000	$ 350,000,000	$ 350,000,000
Less-unamortized debt discount			(1,039,000)	(1,238,000)	(1,300,000)
Senior Notes			348,961,000	348,762,000
Capital leases	5,841,000	6,243,000
Revolving credit loan						45,587,000		166,975,000
Debt and Capital Lease Obligations	400,389,000	521,980,000
Less-current maturities (included as "Revolving credit loans and current portion of long-term debt, net")	(46,154,000)	(167,522,000)
Long-term debt, less current maturities	$ 354,235,000	$ 354,458,000
Debt instrument expiration year							2017