Debt (Components Of Debt) (Details) (USD $)			9 Months Ended			9 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2011	Jan. 31, 2011	Oct. 31, 2011 Convertible Senior Debentures [Member]	Jan. 31, 2011 Convertible Senior Debentures [Member]	Dec. 31, 2006 Convertible Senior Debentures [Member]	Oct. 31, 2011 Loan Payable To Brightstar Corporation, Interest At LIBOR Plus 4.0% Payable Annually, Due September 2015 [Member]	Jan. 31, 2011 Loan Payable To Brightstar Corporation, Interest At LIBOR Plus 4.0% Payable Annually, Due September 2015 [Member]	Oct. 31, 2011 Other Committed And Uncommitted Revolving Credit Facilities, Expiring On Various Dates Through Fiscal 2012 [Member]	Oct. 31, 2010 Other Committed And Uncommitted Revolving Credit Facilities, Expiring On Various Dates Through Fiscal 2012 [Member]	Jan. 31, 2011 Other Committed And Uncommitted Revolving Credit Facilities, Expiring On Various Dates Through Fiscal 2012 [Member]	Oct. 31, 2011 Interest-Free Revolving Credit Loan Payable To Brightstar Corporation [Member]	Jan. 31, 2011 Interest-Free Revolving Credit Loan Payable To Brightstar Corporation [Member]
Debt Instrument [Line Items]
Convertible senior debentures, face value			$ 350,000,000	$ 350,000,000	$ 350,000,000
Less-unamortized debt discount	(1,300,000)		(1,285,000)	(8,993,000)
Convertible senior debentures, net			348,715,000	341,007,000
Capital leases	7,080,000	7,325,000
Loan payable						15,940,000	15,203,000
Revolving credit loan								62,660,000		92,931,000	38,737,000	38,045,000
Long-term debt	473,132,000	494,511,000
Less-current maturities (included as "Revolving credit loans and current portion of long-term debt, net")	(411,909,000)	(434,435,000)
Total long-term debt	$ 61,223,000	$ 60,076,000
Convertible senior debentures, semi-annual interest rate			2.75%		2.75%
Annual interest rate on loans payable in addition to LIBOR						4.00%	4.00%
Debt, maturity date			Dec. 01, 2026			Sep. 01, 2015
Revolving credit loans, interest rate								7.99%		3.27%
Revolving credit loans, expiration date									2012