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Hedging Instruments (Tables)
6 Months Ended
Jul. 31, 2011
Hedging Instruments [Abstract]  
Derivative gains and losses in the Condensed Consolidated Statements of Earnings
                                 
    Three Months Ended July 31,  
    2011     2010  
    Pre-Tax Gain     Pre-Tax Loss     Pre-Tax Gain     Pre-Tax Loss  
    Recognized in     Recognized in     Recognized in     Recognized in  
    Earnings on     Earnings on     Earnings on     Earnings on  
(in thousands)   Derivatives     Hedged Item     Derivatives     Hedged Item  
Derivatives in Fair Value Hedging Relationships:
                               
Interest rate swap agreements a
  $ 1,775     $ (1,486 )   $ 4,441     $ (3,899 )
 
                       
                                 
    Six Months Ended July 31,  
    2011     2010  
    Pre-Tax Gain     Pre-Tax Loss     Pre-Tax Gain     Pre-Tax Loss  
    Recognized in     Recognized in     Recognized in     Recognized in  
    Earnings on     Earnings on     Earnings on     Earnings on  
(in thousands)   Derivatives     Hedged Item     Derivatives     Hedged Item  
Derivatives in Fair Value Hedging Relationships:
                               
Interest rate swap agreements a
  $ 1,750     $ (1,492 )   $ 4,906     $ (4,297 )
 
                       
                                 
    Three Months Ended July 31,  
    2011     2010  
            Amount of (Loss)             Amount of (Loss)  
            Gain Reclassified             Gain Reclassified  
    Pre-Tax Loss     from Accumulated     Pre-Tax Loss     from Accumulated  
    Recognized in OCI     OCI into Earnings     Recognized in OCI     OCI into Earnings  
(in thousands)   (Effective Portion)     (Effective Portion)     (Effective Portion)     (Effective Portion)  
Derivatives in Cash Flow Hedging Relationships:
                               
Foreign exchange forward contracts b
  $ (8,959 )   $ (1,156 )   $ (1,968 )   $ (37 )
Put option contracts b
    (51 )     (701 )     (1,769 )     (692 )
Precious metal collars b
          213       (1 )     (466 )
Precious metal forward contracts b
    (518 )     910       (1,435 )     322  
 
                       
 
  $ (9,528 )   $ (734 )   $ (5,173 )   $ (873 )
 
                       
                                 
    Six Months Ended July 31,  
    2011     2010  
            Amount of (Loss)             Amount of (Loss)  
    Pre-Tax (Loss)     Gain Reclassified     Pre-Tax (Loss)     Gain Reclassified  
    Gain Recognized     from Accumulated     Gain Recognized     from Accumulated  
    in OCI (Effective     OCI into Earnings     in OCI (Effective     OCI into Earnings  
(in thousands)   Portion)     (Effective Portion)     Portion)     (Effective Portion)  
Derivatives in Cash Flow Hedging Relationships:
                               
Foreign exchange forward contracts b
  $ (10,158 )   $ (2,053 )   $ 643     $ (266 )
Put option contracts b
    (61 )     (1,339 )     (1,416 )     (1,507 )
Precious metal collars b
          607       276       (1,178 )
Precious metal forward contracts b
    2,073       1,815       1,370       460  
 
                       
 
  $ (8,146 )   $ (970 )   $ 873     $ (2,491 )
 
                       
                 
    Pre-Tax Gain (Loss) Recognized in Earnings  
    on Derivative  
    Three Months Ended     Three Months Ended  
(in thousands)   July 31, 2011     July 31, 2010  
Derivatives Not Designated as Hedging Instruments:
               
Foreign exchange forward contracts a
  $ 94 c   $ (99 )c
Call option contracts b
    25       82  
Put option contracts b
    (25 )     (82 )
 
           
 
  $ 94     $ (99 )
 
           
                 
    Pre-Tax Gain (Loss) Recognized in Earnings  
    on Derivative  
    Six Months Ended     Six Months Ended  
(in thousands)   July 31, 2011     July 31, 2010  
Derivatives Not Designated as Hedging Instruments:
               
Foreign exchange forward contracts a
  $ 541 c   $ (614 )c
Call option contracts b
    92       148  
Put option contracts b
    (92 )     (148 )
 
           
 
  $ 541     $ (614 )
 
           
     
a  
The gain or loss recognized in earnings is included within Interest and other expenses, net on the Company’s Condensed Consolidated Statement of Earnings.
 
b  
The gain or loss recognized in earnings is included within Cost of sales on the Company’s Condensed Consolidated Statement of Earnings.
 
c  
Gains or losses on the undesignated foreign exchange forward contracts substantially offset foreign exchange losses or gains on the liabilities and transactions being hedged.