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Fair Value of Financial Instruments (Tables)
9 Months Ended
Oct. 31, 2013
Oct. 31, 2012
Fair Value Disclosures [Abstract]    
Financial Assets and Liabilities Carried at Fair Value
Financial assets and liabilities carried at fair value at October 31, 2013 are classified in the table below in one of the three categories described above: 
 
Carrying
Value
 
Estimated Fair Value
 
Total Fair
Value
(in thousands)
 
Level 1
 
Level 2
 
Level 3
 
Marketable securities a
$
52,201

 
$
52,201

 
$

 
$

 
$
52,201

Derivatives designated as hedging
   instruments:
 
 
 
 
 
 
 
 
 
Precious metal forward contracts b
952

 

 
952

 

 
952

Foreign exchange forward contracts b
8,590

 

 
8,590

 

 
8,590

Derivatives not designated as hedging
   instruments:
 
 
 
 
 
 
 
 
 
Foreign exchange forward contracts b
353

 

 
353

 

 
353

Total financial assets
$
62,096

 
$
52,201

 
$
9,895

 
$

 
$
62,096

 
Carrying
Value
 
Estimated Fair Value
 
Total Fair
Value
(in thousands)
 
Level 1
 
Level 2
 
Level 3
 
Derivatives designated as hedging
   instruments:
 
 
 
 
 
 
 
 
 
Precious metal forward contracts c
$
824

 
$

 
$
824

 
$

 
$
824

Foreign exchange forward contracts c
490

 

 
490

 

 
490

Derivatives not designated as hedging
   instruments:
 
 
 
 
 
 
 
 
 
Foreign exchange forward contracts c
27

 

 
27

 

 
27

Total financial liabilities
$
1,341

 
$

 
$
1,341

 
$

 
$
1,341

Financial assets and liabilities carried at fair value at October 31, 2012 are classified in the table below in one of the three categories described above:
 
 
Carrying
Value
 
Estimated Fair Value
 
Total Fair
Value
(in thousands)
 
Level 1
 
Level 2
 
Level 3
 
Marketable securities a
$
42,399

 
$
42,399

 
$

 
$

 
$
42,399

Time deposits b
1,362

 
1,362

 

 

 
1,362

Derivatives designated as hedging
   instruments:
 
 
 
 
 
 
 
 
 
Precious metal forward contracts b
783

 

 
783

 

 
783

Put option contracts b
95

 

 
95

 

 
95

Foreign exchange forward contracts b
2,762

 

 
2,762

 

 
2,762

Derivatives not designated as hedging
   instruments:
 
 
 
 
 
 
 
 
 
Foreign exchange forward contracts b
55

 

 
55

 

 
55

Total financial assets
$
47,456

 
$
43,761

 
$
3,695

 
$

 
$
47,456

 
Carrying
Value
 
Estimated Fair Value
 
Total Fair
Value
(in thousands)
 
Level 1
 
Level 2
 
Level 3
 
Derivatives designated as hedging
   instruments:
 
 
 
 
 
 
 
 
 
Precious metal forward contracts c
$
1,144

 
$

 
$
1,144

 
$

 
$
1,144

Foreign exchange forward contracts c
12

 

 
12

 

 
12

Derivatives not designated as hedging
   instruments:
 
 
 
 
 
 
 
 
 
Foreign exchange forward contracts c
824

 

 
824

 

 
824

Total financial liabilities
$
1,980

 
$

 
$
1,980

 
$

 
$
1,980