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Hedging Instruments (Tables)
 6 Months Ended
Jul. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Information on Location and Amounts of Derivative Gains and Losses in Condensed Consolidated Financial Statements
Information on the location and amounts of derivative gains and losses in the condensed consolidated financial statements is as follows:
 
 
Three Months Ended July 31,
 
2013
 
2012
(in thousands)
Pre-Tax Gain
(Loss) Recognized
in OCI (Effective
Portion)
 
Gain (Loss)
Reclassified from
Accumulated OCI
into Earnings
(Effective Portion)
 
Pre-Tax Loss 
Recognized
in OCI
(Effective Portion)
 
Loss Reclassified
from Accumulated
OCI into Earnings
(Effective Portion)
Derivatives in Cash Flow Hedging
   Relationships:
 
 
 
 
 
 
 
Foreign exchange forward contracts a 
$
191

 
$
3,139

 
$
(3,824
)
 
$
(1,732
)
Put option contracts a 
(8
)
 
662

 
(308
)
 
(6
)
Precious metal forward contracts a 
(2,415
)
 
(1,008
)
 
(4,800
)
 
(2,084
)
Forward-starting interest rate swaps b
—

 
(386
)
 
(18,650
)
 
(134
)
 
$
(2,232
)
 
$
2,407

 
$
(27,582
)
 
$
(3,956
)
 
Six Months Ended July 31,
 
2013
 
2012
(in thousands)
Pre-Tax Gain
(Loss) Recognized
in OCI (Effective
Portion)
 
Gain (Loss)
Reclassified from
Accumulated OCI
into Earnings
(Effective Portion)
 
Pre-Tax Gain
(Loss) Recognized
in OCI
(Effective Portion)
 
Loss Reclassified
from Accumulated
OCI into Earnings
(Effective Portion)
Derivatives in Cash Flow Hedging
   Relationships:
 
 
 
 
 
 
 
Foreign exchange forward contracts a 
$
9,367

 
$
5,068

 
$
4,261

 
$
(4,313
)
Put option contracts a 
1,270

 
930

 
(409
)
 
(129
)
Precious metal forward contracts a 
(7,399
)
 
(1,933
)
 
(7,712
)
 
(3,139
)
Forward-starting interest rate swaps b
—

 
(776
)
 
(26,511
)
 
(134
)
 
$
3,238

 
$
3,289

 
$
(30,371
)
 
$
(7,715
)