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Other Income (Expense), Net (Tables)
 12 Months Ended
Jan. 31, 2012
Other Income and Expenses [Abstract]  
Schedule of Other Nonoperating Income (Expense)
Other income (expense), net, for the fiscal years ended January 31, 2012, 2011 and 2010 is comprised of the following:
 
 
Fiscal Years Ended January 31,
 
 
2012
 
2011
 
2010
 
 
(In thousands)
Realized gains on investments, net
 
$
24,414

 
$
23,810

 
$
10,775

Impairment of auction rate securities
 
—

 
(407
)
 
(6,914
)
Foreign currency transaction losses, net
 
1,382

 
857

 
(1,898
)
Realized and unrealized losses on derivatives, net
 
(896
)
 
(2,761
)
 
(1,118
)
Realized and unrealized losses on interest rate swap, net
 
—

 
(3,102
)
 
(13,591
)
Impairment of UBS put
 
—

 
(6,696
)
 
(6,889
)
Proceeds from settlement of CTI claims
 
4,750

 
—

 
—

Impairment of investment
 
—

 
(2,110
)
 
(242
)
Dividend income
 
94

 
158

 
1,635

Other, net
 
(513
)
 
(113
)
 
(5,200
)
 
 
$
29,231

 
$
9,636

 
$
(23,442
)