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Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2012
Shareholders' Equity [Abstract]  
Summary Of Share Option Activity Under The Stock Option Plan
                                                 
 
 
2012
 
 
2011
 
 
2010
 
 
 
Number
of
options
 
 
Weighted
average
exercise
price
 
 
Number
of
options
 
 
Weighted
average
exercise
price
 
 
Number
of
options
 
 
Weighted
average
exercise
price
 
Outstanding – beginning of  the year
 
  
1,450,890
     $
37.07
 
 
 
1,635,305
 
 
$
35.96
 
 
 
1,858,250
 
 
$
35.24
 
  Granted
 
  
     30,000
      
     35.21
 
 
 
 63,300
 
 
 
50.74
 
 
 
28,000
 
 
 
52.23
 
  Exercised
 
  
  (69,898
 )     
     33.19
 
 
 
(226,965
)
 
 
32.41
 
 
 
(223,020
)
 
 
32.53
 
  Forfeited
 
  
  (25,500
 )     
51.83
 
 
 
(20,750
)
 
 
42.33
 
 
 
(27,925
)
 
 
31.91
 
Outstanding – end of the year
 
  
1,385,492
     $
36.95
 
 
 
1,450,890
 
 
$
37.07
 
 
 
1,635,305
 
 
$
35.96
 
Options exercisable at the end of the year
 
  
1,271,266
    
$
 36.07
 
 
 
1,292,806
 
 
$
35.17
 
 
 
963,289
 
 
$
34.70
 
Summary Of Options Outstanding Separated Into Ranges Of Exercise Prices
                                             
 
 
 
Options outstanding
 
 
Options exercisable
 
 
 
 
Exercise price
 
 
 
Number
of
options
 
 
Weighted
average
remaining
contractual
life (years)
 
 
Weighted
average
exercise
price
per share
 
 
 
Number
of
options
 
 
Weighted
average
exercise
price
per share
 
 
$33.10 - $63.85
 
 
 
1,385,492
 
 
  
1.24
 
 
$
36.95
 
 
 
1,271,266
 
 
$
36.07
 
Compensation Expenses Before Tax
                         
 
 
Year ended December 31,
 
 
 
2012
 
 
2011
 
 
2010
 
Cost of revenues
 
$
1,785
 
 
$
924
 
 
$
2,353
 
R&D and marketing expenses
 
 
425
 
 
 
458
 
 
 
954
 
General and administration expenses
 
 
1,116
 
 
 
614
 
 
 
1,904
 
 
 
$
3,326
 
 
$
1,996
 
 
$
5,211
 
Weighted Average Exercise Price And Fair Value Of Options Granted
                         
 
 
Less than market price
 
 
 
Year ended December 31,
 
 
 
2012
 
 
2011
 
 
2010
 
Weighted average exercise price per share
 
$
35.21
 
 
$
50.74
 
 
$
52.23
 
Weighted average fair value per share on grant date
 
$
  8.45
 
 
$
12.12
 
 
$
11.99
 
Computation Of Basic And Diluted Net Earnings Per Share
 
F.
Computation of basic and diluted net earnings per share:
 
Year ended
December 31, 2012
 
 
Year ended
December 31, 2011
 
 
Year ended
December 31, 2010
 
 
 
Net income
to shareholders
of ordinary
shares
 
 
Weighted
average
number
of
shares (*)
 
 
Per
Share
amount
 
 
Net income
to shareholders
of ordinary
shares
 
 
Weighted
average
number of
shares (*)
 
 
 
Per
Share
amount
 
 
Net income
to shareholders
of ordinary
shares
 
 
Weighted
average
number
of
shares (*)
 
 
Per
Share
amount
 
Basic net earnings
 
$
167,879
      
42,190
 
  
$
3.98
 
 
$
90,288
 
 
 
42,764
 
 
$
2.11
 
 
$
183,498
 
 
 
42,645
 
 
$
4.30
 
 
 
 
                  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Effect of dilutive securities:
 
 
                  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Employee stock options
 
 
-
      
87
 
      
 
 
 
-
 
 
 
367
 
 
 
 
 
 
 
-
 
 
 
572
 
 
 
 
 
Diluted net earnings
 
$
167,879
      
42,277
 
   $
3.97
 
 
$
90,288
 
 
 
43,131
 
 
$
2.09
 
 
$
183,498
 
 
 
43,217
 
 
$
4.25
 
 
(*) In thousands